Log in

Relevant bibliographies by topics / Geomagnetic anomaly / Journal articles

To see the other types of publications on this topic, follow the link: Geomagnetic anomaly.

Journal articles on the topic 'Geomagnetic anomaly'

Author: Grafiati

Published: 4 June 2025

Last updated: 1 August 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Geomagnetic anomaly.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Hasibuan, Jamaludin, Asdiati Berutu, Halimahtun Sakdiah, and Rahmatsyah Rahmatsyah. "Studi Penentuan Anomali Situs Purbakala di Tapanuli Tengah Dengan Metode Geomagnetik." Wahana Fisika 2, no. 1 (2017): 1. http://dx.doi.org/10.17509/wafi.v2i1.7040.

Full text

Abstract:

Penelitian penentuan anomali magnetik situs arkeologi di Tapanuli Tengah dengan metode geomagnetik telah dilakukan untuk mengetahui adanya penampang anomali magnetik di lokasi Lobu Tua. Metode pengukuran Geomagnet menggunakan tipe PPM (Proton Precession Magnetometer) Elsec 770, pengambilan data dilakukan secara acak dengan jumlah titik yang diperoleh 51 titik pengukuran, pengolahan data menggunakan surfer 11 untuk mendapatkan peta kontur dan Mag2DC for windows. Hasil penelitian menunjukkan bahwa penyebaran struktur pelapis Lobu Tua menggunakan metode geomagnet menyebar secara vertikal dan hori

APA, Harvard, Vancouver, ISO, and other styles

2

Andriani, Fitria Dwi, Mimin Iryanti, and Indriana Lucky Sari. "Analisis Pola Waktu Mula Anomali Polarisasi Sinyal Sebelum Gempa Bumi Di Wilayah Aceh Dan Sumatera Utara." Wahana Fisika 2, no. 2 (2017): 54. http://dx.doi.org/10.17509/wafi.v2i2.9372.

Full text

Abstract:

Telah dilakukan penelitian mengenai pola waktu mula anomali polarisasi sinyal geomagnet yang dapat dijadikan sebagai parameter dalam menentukan tanda atau gejala sebelum gempa bumi dengan menggunakan data komponen magnetik yang diperoleh dari pengamatan geomagnetik di Obsevatorim Badan Meteorologi Klimatologi Geofisika Tungtungan. Penelitian ini bertujuan untuk mengetahui pola waktu mula anomali polarisasi sebelum gempa bumi di wilayah Aceh dan Sumatera Utara terjadi. Gempa bumi yang di invertigasi merupakan gempa bumi yang terjadi di Sumatera Utara dan Aceh pada periode 2012-2015 dan memiliki

APA, Harvard, Vancouver, ISO, and other styles

3

Patmawidjaya, Tatang, and Subagio Subagio. "PENELITIAN GAYABERAT DAN GEOMAGNIT KEPULAUAN ARU, CEKUNGAN WOKAM." JURNAL GEOLOGI KELAUTAN 12, no. 1 (2016): 1. http://dx.doi.org/10.32693/jgk.12.1.2014.241.

Full text

Abstract:

Paparan Arafura di bagian selatan Kepulauan Aru merupakan depresi Lempeng Indo-Australia yang ditunjukkan oleh anomali gayaberat dan geomagnet tinggi. Sedangkan depresi di bagian utara yang tertahan Palung Aru diperlihatkan oleh anomali gayaberat tinggi dan anomali geomagnet rendah. Anomali ini diduga sebagai penebalan batuan metamorf yang mengalami pangangkatan sebagai alas cekungan Wokam. Analisis data gayaberat dan geomagnet mengindikasikan penurunan cekungan ini ke arah utara. Penurunan anomali gayaberat ke arah Pulau Wokam yang berarah baratdaya-timurlaut di selatan dan baratlaut-tenggara

APA, Harvard, Vancouver, ISO, and other styles

4

Ahyar, Asep Saepul, and Bambang Sunardi. "KORELASI POLARISASI MAGNET Z/H UNTUK IDENTIFIKASI PREKURSOR GEMPA DI SEKITAR PELABUHAN RATU." Spektra: Jurnal Fisika dan Aplikasinya 2, no. 3 (2017): 179–86. http://dx.doi.org/10.21009/spektra.023.03.

Full text

Abstract:

Abstrak Efek seismo-elektromagnetik yang berlangsung dalam rentang frekuensi luas yang mendahului gempa telah banyak dilaporkan dalam beberapa penelitian sebelumnya. Efek tersebut diharapkan dapat dimanfaatkan dalam mitigasi bencana gempa. Penelitian ini membahas penerapan metode korelasi polarisasi magnet komponen Z/H untuk mengidentifikasi prekursor gempa di sekitar Pelabuhan Ratu. Data yang dipergunakan adalah data magnet tiga komponen selama 31 hari sebelum kejadian gempa. Identifikasi anomali geomagnet dilakukan dengan menerapkan metode korelasi polarisasi magnet Z/H untuk menghitun

APA, Harvard, Vancouver, ISO, and other styles

5

Adrianto, Febri Adrianto, Refrizon, and Arif Ismul Hadi. "Model 2D of Subsurface Structures in the Dempo Magnetic Area of Pagar Alam City Using Geomagnetic Method." Jurnal Kumparan Fisika 6, no. 3 (2023): 167–76. http://dx.doi.org/10.33369/jkf.6.3.167-176.

Full text

Abstract:

ABSTRAK Metode geomagnetik digunakan dalam penelitian ini untuk membuat model 2D struktur bawah permukaan di kawasan Dempo Magnet kota Pagar Alam berdasarkan sebaran anomali. Terdapat 48 titik pengukuran pada lokasi penelitian. Pengolahan data dilakukan dengan membuat peta anomali magnetik total. Koreksi diurnal dan koreksi international geomagnetic reference field (IGRF) dilakukan untuk mendapatkan nilai anomali magnetik total. Data magnetik tersebut kemudian diolah untuk memisahkan anomali regional dan anomali residual menggunakan bandpass filter, kemudian dilakukan transformasi reduksi ke k

APA, Harvard, Vancouver, ISO, and other styles

6

Maspupu, John, and Setyanto C. D. Pranoto. "MODEL PARSIAL HARI TENANG VARIASI MEDAN GEOMAGNET SEBAGAI FUNGSI HARI DALAM SETAHUN, USIA BULAN DAN WAKTU LOKAL DI STASION GEOMAGNET TONDANO." JURNAL GEOLOGI KELAUTAN 12, no. 1 (2016): 43. http://dx.doi.org/10.32693/jgk.12.1.2014.245.

Full text

Abstract:

Penentuan suatu model parsial hari tenang variasi medan geomagnet di stasion geomagnet Tondano merupakan fungsi Date of Year (DOY), Lunar Age (LA), dan Local Time (LT). Diperoleh tiga model parsial hari tenang variasi medan geomagnet yaitu = g(DOY), = h(LA), dan = m(LT). Kontribusi dari DOY terhadap hari tenang variasi medan geomagnet sangatlah kecil (sebesar 0,784.10-3 %). Kontribusi faktor fisis lainnya diduga berperan terhadap hari tenang variasi medan geomagnet . Informasi hasil analisis model parsial variasi hari tenang terhadap usia bulan menunjukkan adanya anomali di sekitar lokasi peng

APA, Harvard, Vancouver, ISO, and other styles

7

Sarmili, Lili, and Lukman Arifin. "INDIKASI GUNUNGAPI BAWAH LAUT DI PERAIRAN SANGEANG SUMBAWA NUSA TENGGARA BARAT." JURNAL GEOLOGI KELAUTAN 13, no. 2 (2016): 75. http://dx.doi.org/10.32693/jgk.13.2.2015.263.

Full text

Abstract:

Penelitian dengan menggunakan metode seismik pantul saluran ganda (multichannel) dan geomagnet mengindikasikan adanya gunungapi bawah laut. Dari penampang rekaman seismik dapat ditafsirkan bahwa Gunungapi bawah laut ditandai dengan bentuk tonjolan atau terobosan menembus dasar laut. Dari data megnetik kelautan diperoleh bahwa pada lokasi gunungapi bawah laut diketahui nilai anomali intensitas magnet total cukup tinggi yaitu sekitar 124 nT. Umumnya anomali intensitas magnet tinggi terdapat di bagian selatan daerah penelitian yang ditafsirkan juga sebagai penipisan kerak atau adanya Gunungapi ba

APA, Harvard, Vancouver, ISO, and other styles

8

Fazriyanti, Lina, Arif Tahjono, and Febty Febriani. "Analisis Anomali Sinyal Geomagnetik Menggunakan Metode Detrended Fluctuation Analysis Pada Gempa Bumi Magnitudo 6,1 di Lebak, Banten." Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics 3, no. 1 (2020): 53–60. http://dx.doi.org/10.15408/fiziya.v3i1.15091.

Full text

Abstract:

Abstrak. Secara geografis Pulau Jawa berhadapan langsung dengan zona tumbukan lempeng Eurasia dan Indo-Australia yang menyebabkan wilayah tersebut rawan terjadinya gempa bumi, salah satunya gempa tersebut yaitu di Lebak, Banten dengan magnitudo 6,1. Maka diperlukan usaha untuk meminimalisir resiko gempa bumi, seperti pengamatan prediksi jangka pendek melalui fenomena medan magnetik bumi. Tujuan dari penelitian ini adalah untuk menganalisis apakah terdapat anomali sinyal geomagnetic Ultra Low Frequency (ULF) sebelum gempa bumi terjadi. Penelitian ini menggunakan data geomagnetik periode Januari

APA, Harvard, Vancouver, ISO, and other styles

9

Yu, Ziqiang, Mengchun Pan, Zhongyan Liu, Yujing Xu, Guanjie You, and Qi Zhang. "Research on magnetic anomaly detection method assisted by geomagnetic map." Journal of Physics: Conference Series 2486, no. 1 (2023): 012062. http://dx.doi.org/10.1088/1742-6596/2486/1/012062.

Full text

Abstract:

Abstract Magnetic anomaly detection is a detection technology for underwater/underground ferromagnetic targets. In the geomagnetic anomaly area, the change of magnetic feld is very complicated, and the detection ability of traditional detection methods will decline sharply. To solve this problem, we construct a high-precision local geomagnetic map, which turns geomagnetic anomalies into known prior information to assist detection. Firstly, the accuracy of local geomagnetic map is improved by the optimized variation function of interpolation algorithm and an efficient mapping strategy. Secondly

APA, Harvard, Vancouver, ISO, and other styles

10

Su, Wei. "Magnetic Anomaly Data Detection of Local Marine Geomagnetic Field Model considering Robust Trend Surface Scientific Calculation Algorithm." Scientific Programming 2022 (May 9, 2022): 1–10. http://dx.doi.org/10.1155/2022/4055976.

Full text

Abstract:

As a momentous part of marine data detection, modeling the marine geomagnetic field and detecting its magnetic data have momentous theoretical and practical value for obtaining its geomagnetic field parameters and characteristic distribution and then carrying out marine environment research. The detection of magnetic anomaly data of local marine geomagnetic field model has become a momentous prerequisite for obtaining key parameter info of local ocean and subsequent development and utilization. On account of this, this paper first analyzes the detection of local marine geomagnetic anomaly data

APA, Harvard, Vancouver, ISO, and other styles

11

Sobitnyak, L. I., M. I. Ryabov, M. I. Orlyuk, et al. "COMPARATIVE ANALYSIS OF MAGNETIC STORMS IN THE ODESSA MAGNETIC ANOMALY REGION WITH PLANETARY AND IONOSPHERIC STORMS DURING THE MONITORING PROGRAM AT RT "URAN-4" (1987 – 2010)." Odessa Astronomical Publications 36 (December 4, 2023): 183–87. http://dx.doi.org/10.18524/1810-4215.2023.36.290585.

Full text

Abstract:

This work is a continuation of the study of the response of the Odesa geomagnetic anomaly to the manifestations of solar and planetary geomagnetic activity. Not far from the territory of this magnetic anomaly there is the geomagnetic observatory "Odesa" and the decameter radio telescope "URAN-4" of the RI NASU. A catalogue of magnetic storms for the period 1987-1994 and 2000-2009 was compiled for the monitoring program of high-power space radio sources at RT "URAN-4" using the database of the geomagnetic observatory "Odesa". In this paper, a comparative analysis of the features of the manifest

APA, Harvard, Vancouver, ISO, and other styles

12

RYABOV, M. I., A. L. SUKHAREV, M. I. ORLYUK, et al. "Space weather effects in Odesa magnetic anomaly." Astronomical and Astrophysical Transactions, Volume 34, Numéro 4 (March 31, 2025): 299–316. https://doi.org/10.17184/eac.9276.

Full text

Abstract:

Analysis of large time series of geomagnetic data obtained at the Odesa and Lviv geomagnetic observatories in Ukraine reveals the difficulty of determining geomagnetic (including sudden) storms. Calculation of traditionally used K-indexes has some disadvantages: they provide no link to the physical features of magnetic storms’ development, do not account for their duration, and evaluate geomagnetic activity only in three-hour intervals. Here we considered the use of neural network clustering and wavelet analysis for detecting geomagnetic storms in large data series over one or several months.

APA, Harvard, Vancouver, ISO, and other styles

13

Sutaji, Hadi Imam, Abdul Wahid, and Ali Warsito. "PEMETAAN ZONA POTENSI TAMBANG MANGAN DAERAH NAIP KABUPATAN TIMOR TENGAH SELATAN DENGAN METODE GEOMAGNETIK." Jurnal Fisika : Fisika Sains dan Aplikasinya 5, no. 1 (2020): 30–36. http://dx.doi.org/10.35508/fisa.v5i1.1533.

Full text

Abstract:

Abstrak  Telah dipemetakan zona potensi tambang mangan daerah Naip Kabupatan Timor Tengah Selatan menggunakan metode geomagnetik. Tujuan penelitian ini adalah mengetahui struktur perlapisan dan pola sebaran batuan bawah permukaan yang diduga mengandung mangan. Hasil penelitian diinterpretasikan secara kualitatif dan kuantitatif. Interpretasi kualitatif menunjukkan anomali rendah bernilai antara -10 sampai < 50 nT sebagian besar berada pada bagian selatan dan anomali tinggi yaitu 50 sampai 220 nT, umumnya terdapat di bagian utara lokasi penelitian. Anomali rendah diinterpretasika

APA, Harvard, Vancouver, ISO, and other styles

14

Wu, Pan, and Minghui Wei. "Analysis of Magnetic Anomaly Characteristics of Underground Non-Coplanar Cross-buried Iron Pipelines." Journal of Environmental and Engineering Geophysics 25, no. 2 (2020): 223–33. http://dx.doi.org/10.2113/jeeg19-092.

Full text

Abstract:

The non-coplanar cross-buried pipelines are a common way of pipeline wiring. In order to investigate the magnetic anomaly characteristics of the non-coplanar cross-buried pipelines and guide the site operation, the influences of a series of factors on the magnetic anomaly of the non-coplanar cross-buried pipelines are analyzed. Based on the principle of magnetic dipole construction, a forward model is established for the magnetic anomaly characteristics of the subsurface non-coplanar cross-buried pipelines. The basic characteristics of magnetic anomaly for the non-coplanar cross-buried pipelin

APA, Harvard, Vancouver, ISO, and other styles

15

Б.Даариймаа та Ц.Баатарчулуун. "Монгол орны тектоник хагарлын системийг геосоронзон гажлын орноор үнэлсэн дүн". Геологийн асуудлууд 15 (23 лютого 2023): 58–67. http://dx.doi.org/10.22353/.v15i01.2273.

Full text

Abstract:

Magnetic anomaly map of Mongolia and its directional derivative maps were used to estimate the some fault parameters of different types of faults in the Mongolian territory. Direction and location of majority of faults, including deep-seated faults, were determined in good accordance with geomagnetic anomaly and its horizontal and vertical derivative maps. Also, some probable faults have been investigated according to the geomagnetic anomaly peculiarities.

APA, Harvard, Vancouver, ISO, and other styles

16

Tserendug, Shoovdor, Bayanjargal Genden, Tumen Nasan-Ochir, and Tsoodol Zolbadral. "heat flow losing via earth's surface around of Khulj hot spring." Mongolian Geoscientist 28, no. 56 (2023): 34–41. http://dx.doi.org/10.5564/mgs.v28i56.2671.

Full text

Abstract:

In this paper, we extracted values of geomagnetic anomaly sourced in the lithosphere from the total intensity of geomagnetic that is measured on the 750 points on an area (100x100 km2) around the Khulj hot springs. The two-dimensional map of the distribution of the anomaly geomagnetic corresponding to this area was made via these extracted values of anomaly geomagnetic. The method of spectral analysis was used to estimate the Curie Point Depth, which is lost magnetic characteristics of the lithosphere with a temperature of 580o C and the depth of layer sourcing anomaly geomagnetic with high co

APA, Harvard, Vancouver, ISO, and other styles

17

Liu, Yifei, Ning Zhang, Zhangsong Shi, and Hongcan Gu. "Research on a matching detection method for magnetic anomaly of underwater targets." AIP Advances 13, no. 2 (2023): 025248. http://dx.doi.org/10.1063/5.0137954.

Full text

Abstract:

In the field of aviation anti-submarine warfare, magnetic detection systems often result in a large number of false alarms due to the inability to effectively distinguish between a local geomagnetic anomaly in the background field and a target magnetic anomaly. To address this problem, this paper proposes a matching detection method for the magnetic anomaly of underwater targets. This method is based on the measured data of the magnetic anomaly in the sea area, and the geomagnetic reference map of the area is generated by interpolation of the Kriging method; then, the background field signal e

APA, Harvard, Vancouver, ISO, and other styles

18

Ariani, Novi Dwi, Thaqibul Fikri Niyartama, and Nugroho Budi Wibowo. "PEMETAAN SEBARAN BATUAN PENYUSUN PAGAR CANDI DI SITUS CANDI LOSARI DUSUN LOSARI, DESA SALAM, KECAMATAN SALAM, KABUPATEN MAGELANG BERDASARKAN METODE MAGNETIK." Berkala Arkeologi 33, no. 1 (2013): 121–31. http://dx.doi.org/10.30883/jba.v33i1.10.

Full text

Abstract:

Mapping geophysics research was conducted by geomagnetic method to know anomaly pattern of magnetic pole and to know distribution location and depth of temple gate composing stone in Losari Temple Site by using magnetic data. Data collection used Proton Precessions Magnetometer (PPM) G-856AX by area width of 88 km x 40 km and measurement space of 3 meter used looping method. Field data was corrected by daily variation and IGRF (International Geomagnetics Reference Field) correction and then reduction to pole. The slice modeling was conducted on local anomaly map on height of 6 meter. The resul

APA, Harvard, Vancouver, ISO, and other styles

19

Sobitnyak, L. I., M. I. Ryabov, M. I. Orlyuk, et al. "ANALYSIS OF THE MAGNETIC STORMS CATALOG FOR MONITORING RADIO SOURCE FLUXE DATA WITH THE URAN-4 RADIO TELESCOPE IN THE ODESA MAGNETIC ANOMALY ZONE." Radio physics and radio astronomy 25, no. 4 (2020): 324–30. http://dx.doi.org/10.15407/rpra25.04.324.

Full text

Abstract:

Purpose: Compilation of a digital catalog of magnetic storms in the Odesa magnetic anomaly zone in order to find the reasons for possible changes in the radiation fluxes of cosmic radio sources, according to observations at the URAN-4 radio telescope. Design/methodology/approach: Since 1987 until now, the radio flux of powerful galactic and extragalactic radio sources has been monitored at the URAN-4 radio telescope of the Odesa Observatory of the Institute of Radio Astronomy of the National Academy of Sciences of Ukraine. The monitoring program includes radio galaxies 3C274, 3C405 and superno

APA, Harvard, Vancouver, ISO, and other styles

20

Izhovkina, N. I., S. N. Artekha, N. S. Erokhin, and L. A. Mikhailovskaya. "Atmospheric vortices in a geomagnetic anomaly." Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa 18, no. 2 (2021): 299–306. http://dx.doi.org/10.21046/2070-7401-2021-18-2-299-306.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

OSHIMA, Shoichi, Toshiro KANEKO, Ken-ei ONODERA, et al. "Geomagnetic Anomaly Distribution of Iwo-zima." Journal of Geography (Chigaku Zasshi) 94, no. 6 (1985): 502–15. http://dx.doi.org/10.5026/jgeography.94.502.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Chamalaun, F. H., and P. Cunneen. "The canning basin geomagnetic induction anomaly." Australian Journal of Earth Sciences 37, no. 4 (1990): 401–8. http://dx.doi.org/10.1080/08120099008727940.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Huang, Ying, Peimin Zhu, and Shaodong Li. "Feasibility Study on Earthquake Prediction Based on Impending Geomagnetic Anomalies." Applied Sciences 14, no. 1 (2023): 263. http://dx.doi.org/10.3390/app14010263.

Full text

Abstract:

By deploying a magnetic monitoring network in the earthquake-prone areas of Sichuan, China, and conducting long-term observations, processing, and analysis of real-time geomagnetic data, it can be observed that the pre-earthquake geomagnetic anomalies are highly correlated with the occurrence time of earthquakes. We propose a novel algorithm that obtains a new quantity by accumulating geomagnetic anomaly energy to eliminate external environmental interference and take its gradient as a measure for predicting the occurrence time of an earthquake. Through observations of a large amount of geomag

APA, Harvard, Vancouver, ISO, and other styles

24

Gendenpuntsag, Bayanjargal, Batmagnai Erdenechimeg, Nasan-Ochir Tumen, Tserendug Shoovdor, and Otgonbold Nyamdorj. "Using the processing and modelling of the geomagnetic method for exploring mineral deposits: A case study at the gold area in Dashbalbar, Dornod." Mongolian Journal of Astronomy and Geophysics 11, no. 1 (2024): 13–24. https://doi.org/10.5564/mjag.v11i1.4184.

Full text

Abstract:

This paper presents the results of geomagnetic measurements conducted along 23 profiles in the 740-hectare Uvur Khooloi area, located 35 km northwest of the centre of Dashbalbar Sum, Dornod Province. The data were processed and combined with the geological map of the area for interpretation. In this study, anomalies associated with the lithosphere were extracted from the total geomagnetic field measurements on the Earth’s surface, and an anomaly distribution map was created for the area. The magnetic anomaly map for Uvur Khooloi revealed a linear structure approximately 120 meters wide, with a

APA, Harvard, Vancouver, ISO, and other styles

25

Trindade, Ricardo I. F., Plinio Jaqueto, Filipe Terra-Nova, et al. "Speleothem record of geomagnetic South Atlantic Anomaly recurrence." Proceedings of the National Academy of Sciences 115, no. 52 (2018): 13198–203. http://dx.doi.org/10.1073/pnas.1809197115.

Full text

Abstract:

The diminishing strength of the Earth’s magnetic dipole over recent millennia is accompanied by the increasing prominence of the geomagnetic South Atlantic Anomaly (SAA), which spreads over the South Atlantic Ocean and South America. The longevity of this feature at millennial timescales is elusive because of the scarcity of continuous geomagnetic data for the region. Here, we report a unique geomagnetic record for the last ∼1500 y that combines the data of two well-dated stalagmites from Pau d’Alho cave, located close to the present-day minimum of the anomaly in central South America. Magneti

APA, Harvard, Vancouver, ISO, and other styles

26

He, Liming, Cong Guo, Quanyou Yue, Shixuan Zhang, Zenghui Qin, and Junfei Zhang. "A Novel Ionospheric Disturbance Index to Evaluate the Global Effect on BeiDou Navigation Satellite System Signal Caused by the Moderate Geomagnetic Storm on May 12, 2021." Sensors 23, no. 3 (2023): 1183. http://dx.doi.org/10.3390/s23031183.

Full text

Abstract:

In this paper, we propose a new method to quantitatively evaluate the quality of the carrier phase observation signals of the BeiDou Navigation Satellite System (BDS) during weak and moderate geomagnetic storms. We take a moderate geomagnetic storm that occurred on 12 May 2021 during the 25th solar cycle as an example. The results show that the newly defined PAS (Percentage of Affected Satellites) index shows significant anomaly changes during the moderate geomagnetic storm. Its variation trend has good correlations with the geomagnetic storm Kp index and Dst index. The anomaly stations are ma

APA, Harvard, Vancouver, ISO, and other styles

27

Ming, Lulu, Fuyang Ke, Xiangxiang Hu, Wanganyin Cui, and Pan Zhao. "GNSS/AQUA Fusion Study of Atmospheric Response Characteristics and Interaction Mechanisms during the 2022 Tonga Volcanic Eruption." Atmosphere 14, no. 11 (2023): 1619. http://dx.doi.org/10.3390/atmos14111619.

Full text

Abstract:

A large-scale underwater volcanic eruption occurred at the volcano of Hunga Tonga-Hunga Ha’apai (HTHH) on 15 January 2022. At present, there is no consensus on the ionospheric response characteristics and interaction mechanism during volcanic eruptions. Based on the Global Navigation Satellite System (GNSS), AQUA satellite’s Atmospheric Infrared Sounder (AIRS), the experiment studies the response characteristics of the ionosphere and gravity waves during the eruption of the volcano and their interaction mechanisms and the International Real-Time Geomagnetic Observation Network (INTERMAGNET). F

APA, Harvard, Vancouver, ISO, and other styles

28

Zheng, Hui, Hubiao Wang, Lin Wu, Hua Chai, and Yong Wang. "Simulation Research on Gravity-Geomagnetism Combined Aided Underwater Navigation." Journal of Navigation 66, no. 1 (2012): 83–98. http://dx.doi.org/10.1017/s0373463312000343.

Full text

Abstract:

Gravity Aided Navigation (GravAN) and Geomagnetism Aided Navigation (GeomAN) are two methods for correcting Inertial Navigation System (INS) errors of Autonomous Underwater Vehicles (AUVs) without compromising the AUV mission. One requirement for applying these methods is the relatively large field feature variations along the navigation trajectory. But in some regions with small gravity or geomagnetic variation, it is very difficult to achieve a reliable result solely by GravAN or GeomAN. If these two methods were combined, gravity and geomagnetism information could be complementary and the a

APA, Harvard, Vancouver, ISO, and other styles

29

Bolzan, Maurício J. A., Clezio M. Denardini, and Alexandre Tardelli. "Comparison of <i>H</i> component geomagnetic field time series obtained at different sites over South America." Annales Geophysicae 36, no. 3 (2018): 937–43. http://dx.doi.org/10.5194/angeo-36-937-2018.

Full text

Abstract:

Abstract. The geomagnetic field in the Brazilian sector is influenced by the South American Magnetic Anomaly (SAMA) that causes a decrease in the magnitude of the local geomagnetic field when compared to other regions in the world. Thus, the magnetometer network and data set of space weather over Brazil led by Embrace are important tools for promoting the understanding of geomagnetic fields over Brazil. In this sense, in this work we used the H component of geomagnetic fields obtained at different sites in South America in order to compare results from the phase coherence obtained from wavelet

APA, Harvard, Vancouver, ISO, and other styles

30

Pokhotelov, Dimitry, Isabel Fernandez-Gomez, and Claudia Borries. "Polar tongue of ionisation during geomagnetic superstorm." Annales Geophysicae 39, no. 5 (2021): 833–47. http://dx.doi.org/10.5194/angeo-39-833-2021.

Full text

Abstract:

Abstract. During the main phase of geomagnetic storms, large positive ionospheric plasma density anomalies arise at middle and polar latitudes. A prominent example is the tongue of ionisation (TOI), which extends poleward from the dayside storm-enhanced density (SED) anomaly, often crossing the polar cap and streaming with the plasma convection flow into the nightside ionosphere. A fragmentation of the TOI anomaly contributes to the formation of polar plasma patches partially responsible for the scintillations of satellite positioning signals at high latitudes. To investigate this intense plas

APA, Harvard, Vancouver, ISO, and other styles

31

Meloni, A., L. V. Medford, and L. J. Lanzerotti. "Geomagnetic anomaly detected at hydromagnetic wave frequencies." Journal of Geophysical Research 90, B5 (1985): 3569. http://dx.doi.org/10.1029/jb090ib05p03569.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Aggson, T. L., N. C. Maynard, F. A. Herrero, H. G. Mayr, L. H. Brace, and M. C. Liebrecht. "Geomagnetic equatorial anomaly in zonal plasma flow." Journal of Geophysical Research 92, A1 (1987): 311. http://dx.doi.org/10.1029/ja092ia01p00311.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Chen, Chieh-Hung, Jann-Yenq Liu, Pei-Ying Lin, et al. "Pre-seismic geomagnetic anomaly and earthquake location." Tectonophysics 489, no. 1-4 (2010): 240–47. http://dx.doi.org/10.1016/j.tecto.2010.04.018.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

SUKHAREV, A., M. ORLYUK, M. RYABOV, et al. "Results of comparison of fast variations of geomagnetic field and ionospheric scintillations of 3C 144 radio source in the area of Odessa geomagnetic anomaly." Astronomical and Astrophysical Transactions, Volume 33, Numéro 1 (July 1, 2022): 67–88. http://dx.doi.org/10.17184/eac.6481.

Full text

Abstract:

From November 2017 to May 2019 at the Astronomical Observatory of Odessa I.I. Mechnikov National University, the variational component of the geomagnetic field was monitored to study short-periodic geomagnetic variations in the central part of the Odessa regional magnetic anomaly. The measurements were carried out using a LEMI-008 precision fluxgate magnetometer with a sampling rate of 1 Hz. The aim of this work is to compare the manifestation of short-periodic geomagnetic oscillations (which in some cases coincided with periods of geomagnetic pulsations) and ionospheric scintillations of the

APA, Harvard, Vancouver, ISO, and other styles

35

He, Fei, Yong Wei, and Weixing Wan. "Equatorial aurora: the aurora-like airglow in the negative magnetic anomaly." National Science Review 7, no. 10 (2020): 1606–15. http://dx.doi.org/10.1093/nsr/nwaa083.

Full text

Abstract:

Abstract The most fantastic optical phenomena in the Earth's upper atmosphere are the auroras. They are highly informative indicators of solar activity, geomagnetic activity, upper atmospheric structures and dynamics, and magnetospheric energetic particles. An area where the geomagnetic field differs significantly from the expected symmetric dipole, such as at the South Atlantic Anomaly, where the magnetic field intensity is low, gives rise to stronger precipitation of energetic particles into the upper atmosphere. Impact excitation and the subsequent airglow emissions exhibit aurora-like dyna

APA, Harvard, Vancouver, ISO, and other styles

36

Xiong, Pan, Gang Bian, Qiang Liu, Shaohua Jin, and Xiaodong Yin. "Multiscale Bayes Adaptive Threshold Wavelet Transform Geomagnetic Basemap Denoising Taking Residual Constraints into Account." Sensors 24, no. 12 (2024): 3847. http://dx.doi.org/10.3390/s24123847.

Full text

Abstract:

To achieve high-precision geomagnetic matching navigation, a reliable geomagnetic anomaly basemap is essential. However, the accuracy of the geomagnetic anomaly basemap is often compromised by noise data that are inherent in the process of data acquisition and integration of multiple data sources. In order to address this challenge, a denoising approach utilizing an improved multiscale wavelet transform is proposed. The denoising process involves the iterative multiscale wavelet transform, which leverages the structural characteristics of the geomagnetic anomaly basemap to extract statistical

APA, Harvard, Vancouver, ISO, and other styles

37

Nurdin, Nur Hidayat, Muh Altin Massinai, and Sabrianto Aswad. "IDENTIFIKASI POLA SEBARAN INTRUSI BATUAN BAWAH PERMUKAAN MENGGUNAKAN METODE GEOMAGNET DI SUNGAI JENELATA KABUPATEN GOWA." JURNAL GEOCELEBES 1, no. 1 (2017): 17. http://dx.doi.org/10.20956/geocelebes.v1i1.1776.

Full text

Abstract:

AbstrakPenelitian ini dilakukan di Sungai Jenelata, Kabupaten Gowa, Sulawesi Selatan mengunakan metode geomagnet . Tujuan dari penelitian ini yaitu mengidentifikasi struktur geologi bawah permukaan pada daerah penelitian. Jumlah titik pengukuran sebanyak 248 dengan area seluas 70 × 300 meter. Akuisisi data dilakukan dengan menggunakan satu alat magnetometer. Sementara pengolahan data menggunakan koreksi harian dan koreksi IGRF serta filter upward continuation. Pemodelan dilakukan dengan metode forward modeling dengan menggunakan perangkat lunak Mag2DC. Medan magnetik total berkisar antara 42.4

APA, Harvard, Vancouver, ISO, and other styles

38

Wahyudi, Eko J. "Inverse modeling using geomagnetic data of field camp geophysics in Karangsambung (2005-2019)." IOP Conference Series: Earth and Environmental Science 1227, no. 1 (2023): 012040. http://dx.doi.org/10.1088/1755-1315/1227/1/012040.

Full text

Abstract:

Abstract Geomagnetic data from field camp surveys in Karangsambung 2005-2019 were collected and merged. Before 2020 (the restriction of Covid-19 pandemic), there are 4713 and 5984 data of field and base observation in the study area. The purpose of works in this paper are presenting the data collection, simple data processing, and simple calculation of inverse modeling. Fifteen surveys from each year of field camp data acquisition are merged with 2017 survey as reference. The data observation from proton magnetometer are corrected with geomagnetic regional field and diurnal variation (using av

APA, Harvard, Vancouver, ISO, and other styles

39

He, Fei, Yong Wei, Stefano Maffei, et al. "Equatorial auroral records reveal dynamics of the paleo-West Pacific geomagnetic anomaly." Proceedings of the National Academy of Sciences 118, no. 20 (2021): e2026080118. http://dx.doi.org/10.1073/pnas.2026080118.

Full text

Abstract:

Localized regions of low geomagnetic intensity such as the South Atlantic Anomaly allow energetic particles from the Van Allen radiation belt to precipitate into the atmosphere and have been linked to a signature in the form of red aurora–like airglow visible to the naked eye. Smoothed global geomagnetic models predict a low-intensity West Pacific Anomaly (WPA) during the sixteenth to nineteenth centuries characterized by a simple time dependence. Here, we link the WPA to an independent database of equatorial aurorae recorded in Seoul, South Korea. These records show a complex fluctuating beha

APA, Harvard, Vancouver, ISO, and other styles

40

Daud, Yunus, Syamsu Rosid, Fikri Fahmi, Faris Maulana Yunus, and Reza Muflihendri. "Geomagnetic Survey to Explore High-Temperature Geothermal System in Blawan-Ijen, East Java, Indonesia." E3S Web of Conferences 31 (2018): 02003. http://dx.doi.org/10.1051/e3sconf/20183102003.

Full text

Abstract:

Ijen geothermal area is high-temperature geothermal system located in Bondowoso regency, East Java. It is categorized as caldera-hosted geothermal system which is covered by quaternary andesitic volcanic rocks with steep topography at the surrounding. Several surface thermal manifestations are found, such as altered rocks near Mt. Kukusan and a group of Blawan hotsprings in the northern part of the caldera. Geomagnetic survey was conducted at 72 stations which is distributed inside the caldera to delineate the existence of hydrothermal activity. Magnetic anomaly was obtained by reducing total

APA, Harvard, Vancouver, ISO, and other styles

41

Tatsuta, K., Y. Hobara, S. Pal, and M. Balikhin. "Sub-ionospheric VLF signal anomaly due to geomagnetic storms: a statistical study." Annales Geophysicae 33, no. 11 (2015): 1457–67. http://dx.doi.org/10.5194/angeo-33-1457-2015.

Full text

Abstract:

Abstract. We investigate quantitatively the effect of geomagnetic storms on the sub-ionospheric VLF/LF (Very Low Frequency/Low Frequency) propagations for different latitudes based on 2-year nighttime data from Japanese VLF/LF observation network. Three statistical parameters such as average signal amplitude, variability of the signal amplitude, and nighttime fluctuation were calculated daily for 2 years for 16–21 independent VLF/LF transmitter–receiver propagation paths consisting of three transmitters and seven receiving stations. These propagation paths are suitable to simultaneously study

APA, Harvard, Vancouver, ISO, and other styles

42

Chaidir, Fauzi Yul, Okta Dwi Puspita, Gilvandro Rumahorbo, and Hafiz Hamdalah. "Analysis of Geomagnetic and Geoelectric Data to Identify the Potential of Gold Deposits (Case Study: Randu Kuning, Wonogiri, Central Java)." IOP Conference Series: Earth and Environmental Science 830, no. 1 (2021): 012052. http://dx.doi.org/10.1088/1755-1315/830/1/012052.

Full text

Abstract:

Abstract The gold deposit of the low sulfidation epithermal system at the Randu Kuning prospect, Wonogiri, Central Java is the effect of magmatism during the Oligocene due to microdiorite intrusion. The magmatism causes a mineralization process that fills the fractures in the rock. The mineralized of ores that formed in the study area are pyrite, chalcopyrite, sphalerite, galena, electrum and native gold, magnetite and hematite. The appropriate geophysical method to this case study is using the geomagnetic and geoelectric Induced Polarization method. The application of the geomagnetic method a

APA, Harvard, Vancouver, ISO, and other styles

43

Engbers, Yael A., Andrew J. Biggin, and Richard K. Bono. "Elevated paleomagnetic dispersion at Saint Helena suggests long-lived anomalous behavior in the South Atlantic." Proceedings of the National Academy of Sciences 117, no. 31 (2020): 18258–63. http://dx.doi.org/10.1073/pnas.2001217117.

Full text

Abstract:

Earth’s magnetic field is presently characterized by a large and growing anomaly in the South Atlantic Ocean. The question of whether this region of Earth’s surface is preferentially subject to enhanced geomagnetic variability on geological timescales has major implications for core dynamics, core−mantle interaction, and the possibility of an imminent magnetic polarity reversal. Here we present paleomagnetic data from Saint Helena, a volcanic island ideally suited for testing the hypothesis that geomagnetic field behavior is anomalous in the South Atlantic on timescales of millions of years. O

APA, Harvard, Vancouver, ISO, and other styles

44

White, A., and P. R. Milligan. "Geomagnetic variation anomaly on Eyre Peninsula, South Australia." Exploration Geophysics 17, no. 1 (1986): 32–34. http://dx.doi.org/10.1071/eg986032.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Lin, Jiangfa, Gang Wang, Saizhen Zhang, and Yaosong Chen. "The wavelet property of the geomagnetic anomaly signal." Communications in Nonlinear Science and Numerical Simulation 2, no. 4 (1997): 244–48. http://dx.doi.org/10.1016/s1007-5704(97)90011-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Li, Zhen, Zhen Tao, and Lianhai Cao. "Analysis of Ionospheric Anomalies before Earthquakes of Mw6.5 and above in Japan from 2011 to 2022." Atmosphere 15, no. 8 (2024): 887. http://dx.doi.org/10.3390/atmos15080887.

Full text

Abstract:

In this study, a TEC variation window value was selected based on the wavelet power spectrum method to analyze the seismic–ionospheric coupling relationship. In the full-time domain, a 27-day periodicity of the wavelet power spectrum was obtained that passed the 95% significance test. The sliding interquartile range method was used to analyze earthquakes above Mw6.5 in Japan from 2011 to 2022, excluding the hybrid effects between earthquakes close to one another. The sunspot number (SSN), 10.7 cm radio flux (F10.7), total solar irradiance (TSI), solar wind velocity (Vsw), geomagnetic activity

APA, Harvard, Vancouver, ISO, and other styles

47

Mironov, Victor L. "Geomagnetic Anomaly in the Growth Response of Peat Moss Sphagnum riparium to Temperature." Plants 13, no. 1 (2023): 48. http://dx.doi.org/10.3390/plants13010048.

Full text

Abstract:

Temperature plays an essential role in a plant’s life. The current investigation reveals that photoreceptors, whose activity is affected by the geomagnetic field, are a critical element of its perception. This knowledge suggests that plants’ responses to temperature could shift in different geomagnetic conditions. To test this hypothesis, we studied the change in the growth response of the peat moss Sphagnum riparium to temperature with a gradual increase in the geomagnetic Kp index. Growth data for this species were collected from Karelian mires by detailed monitoring over eight full growing

APA, Harvard, Vancouver, ISO, and other styles

48

Jurica, Jan. "Geomagnetic field mapping." Journal of the ASB Society 1, no. 1 (2020): 22–29. http://dx.doi.org/10.51337/jasb20201228003.

Full text

Abstract:

This work focuses on creating maps of the geomagnetic field and areas of increased cosmic radiation surrounding the Earth. Data were measured by Proba-V satellite at Low-Earth orbit 820 kilometres above the Earth during 2015. The actual measured data were compared with the calculated magnetic values. The created maps serve to a better understanding of the shape of the geomagnetic field and show magnetic equator, north magnetic pole and more. The map confirms that the area of the South Atlantic Anomaly corresponds with the weakest area of the geomagnetic field. Maps of different time periods of

APA, Harvard, Vancouver, ISO, and other styles

49

Milligan, P. R., A. White, and F. H. Chamalaun. "Extension of the Eyre Peninsula Conductivity Anomaly." Exploration Geophysics 20, no. 2 (1989): 187. http://dx.doi.org/10.1071/eg989187.

Full text

Abstract:

Twenty-two digitally recording fluxgate magnetometers measuring short-period natural time variations of the geomagnetic field were deployed during 1988 at 54 sites to define the northward extension of the Eyre Peninsula Conductivity Anomaly (EPCA). The southern portion of this zone of high electrical conductivity was initially mapped during the early 1980s; it trends inland just to the east of north from the southern extremity of the peninsula, at nearly 90� to the continental shelf edge.The 1988 data show that the axis of the anomaly in the north initially swings to the east, and then turns N

APA, Harvard, Vancouver, ISO, and other styles

50

Nasuddin, Khairul Afifi, Mardina Abdullah, and Nurul Shazana Abdul Hamid. "Characterization of the South Atlantic Anomaly." Nonlinear Processes in Geophysics 26, no. 1 (2019): 25–35. http://dx.doi.org/10.5194/npg-26-25-2019.

Full text

Abstract:

Abstract. This research intends to characterize the South Atlantic Anomaly (SAA) by applying the power spectrum analysis approach. The motivation to study the SAA region is due to its nature. A comparison was made between the stations in the SAA region and outside the SAA region during the geomagnetic storm occurrence (active period) and the normal period where no geomagnetic storm occurred. The horizontal component of the data of the Earth's magnetic field for the occurrence of the active period was taken on 11 March 2011 while for the normal period it was taken on 3 February 2011. The data s

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!