Possible correlation between the vertical component of lithospheric magnetic field and continental seismicity

Lei, Yu; Jiao, Libin; Chen, Huaran

doi:10.1186/s40623-018-0949-7

Cited by 9 publications

(2 citation statements)

References 61 publications

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“…Base on the same principle, geomagnetic anomalies have been found before and after strong earthquakes [4]. On the other hand, through satellite magnetic measurements and ground magnetic stations, an increase in seismicity has been found in areas of negative anomalies of the Earth's magnetic field [5].…”

Section: Introductionmentioning

confidence: 88%

Evidence of Correlation between High Frequency Geomagnetic Variations and Seismicity in the Caribbean

Moreno¹,

Calais²

2021

OJER

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An analysis between the hourly distribution of earthquakes in three areas of the Caribbean and the high-frequency variations of the geomagnetic field is presented. The number of earthquakes selected for each zone is between 10,000 and 43,000, which guarantees a statistically significant distribution. The hourly distributions of seismicity in all areas show a bay-shape distribution with a significant increase in the number of earthquakes at night, from 11 PM to 5 AM. For example, in eastern Cuba 36.7% of earthquakes occur at that time, representing 11.7% over 25% in the absence of any time preference. Geomagnetic disturbances were compiled from several years to be able to make a statistically significant hourly distribution of their occurrence, being determined by sudden changes in the magnetic field at a short period of 1 minute. In this sense, geomagnetic data were processed between the years 2011-2016, recorded by the geostationary satellite GOES13 and the magnetic ground station SJG in San Juan, Puerto Rico. The result shows a significant correlation between hourly earthquakes distribution and high-frequency geomagnetic variations. The time-varying conductivity response of Earth's interior also correlates with seismicity. The theory behind this correlation could be related to the piezoelectric phenomena and the electromagnetic force induced when the magnetic field is disturbed.

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Section: Introductionmentioning

confidence: 88%

Evidence of Correlation between High Frequency Geomagnetic Variations and Seismicity in the Caribbean

Moreno¹,

Calais²

2021

OJER

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“…Rajaram et al, 2009). Furthermore, the B z at an altitude of 200 km well delineates the geological characteristics such as faults and basins, and exhibits a better correlation with seismicity than the other two components (Jiao et al, 2013;Lei et al, 2018). Hence, the B z calculated at an altitude of 200 km from the EMM2017 model is used (the effects of the other two components are discussed in Supplementary Information) to invert the CPD.…”

Section: Datamentioning

confidence: 99%

A Continental Model of Curie Point Depth for China and Surroundings Based on Equivalent Source Method

Lei,

Jiao,

Huang

et al. 2024

JGR Solid Earth

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The Curie Point Depth (CPD) marks a significant temperature boundary (∼580°C) within the Earth's lithosphere. However, there has been ongoing debate regarding its spatial distribution. In this research, we utilized the Equivalent Source Method (ESM) based on Gauss‐Legendre integration and data obtained from the EMM2017 model, along with a five‐layer susceptibility model, to generate a 0.5° × 0.5° grid of continental CPD distribution for China and surroundings. The average CPD in the study area is 30.4 km, which is slightly shallower than the average depth of global continental Moho (∼33 km). Notably, stable and cold cratonic basins, such as the Tarim Basin and the Sichuan Basin, exhibit deep CPD of ∼45 km. In contrast, the North China Craton, which has experienced significant tectono‐thermal activity since the Late Mesozoic, shows moderate CPD of ∼30 km and a gradual uplift from west to east. The Tuva‐Mongol orocline within the Central Asian Orogenic Belt, the Deccan Volcanic Province in the Indian subcontinent and the Eastern Yangtze Craton have shallow CPD of ∼20 km. We estimate the surface heat flow by CPD, and the result is consistent with measurements within a RMSE of 18.1 mW/m2. When comparing the CPD with Moho, we find that the CPD may lie below Moho in stable and cold cratonic areas. In comparison to two recent global CPD models, our regional model demonstrates better alignment with tectonic features.

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Regional Modeling of the Lithospheric Magnetic Field from Local and Satellite Constraints: A Case Study of the Xinjiang Region

Feng,

Zhang,

Xiong

et al. 2023

Pure Appl. Geophys.

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Possible correlation between the vertical component of lithospheric magnetic field and continental seismicity

Cited by 9 publications

References 61 publications

Evidence of Correlation between High Frequency Geomagnetic Variations and Seismicity in the Caribbean

Evidence of Correlation between High Frequency Geomagnetic Variations and Seismicity in the Caribbean

A Continental Model of Curie Point Depth for China and Surroundings Based on Equivalent Source Method

Regional Modeling of the Lithospheric Magnetic Field from Local and Satellite Constraints: A Case Study of the Xinjiang Region

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