Possible triggering of solar activity to big  earthquakes (Ms?8) in faults with near�west-east strike in China

Han, Yulei; Guo, Zhi‐Xin; Jin-bing, WU; Ma, Lihua

doi:10.1360/03yw0103

Cited by 32 publications

(24 citation statements)

References 5 publications

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“…Han Yanben, Zengjian, Jinbing and Lihua [4] studied the relationship between big earthquakes (Ms ≥ 8) and solar activity that occurred in China and western Mongolia. They discovered that the occurrence dates of most of the big earthquakes in and near faults with west-east strike are close to the maximum years of sunspot num-bers.…”

Section: Introductionmentioning

confidence: 99%

Influences of Solar Cycles on Earthquakes

Tavares¹,

Azevedo²

2011

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This paper inspects possible influence of solar cycles on earthquakes through of statistical analyses. We also discussed the mechanism that would drive the occurrence of increasing of earthquakes during solar maxima. The study was based on worldwide earthquakes events during approximately four hundred years (1600-2010).The increase of earthquakes events followed the Maxima of Solar cycle, and also depends on the tectonic plate location. From 1600 until 1645 events increased during the Maxima in some of the tectonic plates as Pacific, Arabian and South America. The earthquakes analyzed during two grand solar minima, the Maunder (1645-1720) and the Dalton (1790-1820) showed a decrease in the number of earthquakes and the solar activity. It was observed during these minima a significant number of events at specific geological features. After the last minima (Dalton) the earthquakes pattern increased with solar maxima. The calculations showed that events increasing during solar maxima most in the Pacific, South America or Arabian until 1900. Since there were few records during these three centuries we needed additional analysis on modern data. We took the last four solar cycles events (1950-2010) and made similar calculations. The results agreed with the former calculations. It might be that the mechanism for the Sun-Earth connection relies on the solar wind speed. In both records (1600-1900) and (1950-2010) the results showed a significant increase in earthquakes events in some of the tectonic plates linked to solar maxima. The Solar wind energy striking the Earth's magnetosphere affects the entire environment because the pressure on the region increases and the magnetosphere shrinks sometimes four Earth's radii. This sudden compression causes earthquakes in specific plates. During the times of solar minima the pressure from the solar wind on the earth decreases, then the magnetosphere expands and earthquakes happen in a different pattern according to the geological feature on earth's surface less frequently. Solar driven events include coronal mass ejections (CME) and coronal holes, which are at a maximum during the descending phase of solar activity. The tectonic are important because there is heterogeneity in the crust and the tectonic stress depends on each region. The geo-effectiveness of solar wind from a coronal hole only depends on the position of the hole relative to the Earth and for the CMEs an additional factor is their velocity. The influence of these solar events could be detected from electromagnetic variations on the ground prior the earthquakes. The goal in this research was to show the solar events influenced the earthquakes and seismologic events following some special display and also how the Sun's activity played to make earthquakes increase. This paper discussed details of this mechanism, calculations and associated factors.

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Section: Introductionmentioning

confidence: 99%

Influences of Solar Cycles on Earthquakes

Tavares¹,

Azevedo²

2011

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“…However, direct observation of sunspot number is only available for the past four centuries, which is insufficient to analyze long-term periodic fluctuations, such as century and double-century periods. On the other hand, there exist long-term fluctuations in some geophysical phenomena, such as climatic change, and some studies have shown that a few of fluctuations may be related to the solar activity [9][10][11] . To best understand the relation between some geophysical phenomena and long-term periodic solar activity, some researchers have already shown proxies reflecting the long-term change of solar activity.…”

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confidence: 99%

Long-term variations of solar activity

Yin

Han

2007

CHINESE SCI BULL

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Using the Lomb-Scargle periodogram we analyzed two sunspot series: the one over the past 11000 years at the 10-year interval based upon the survey data of 14 C concentration in tree-rings, reconstructed by Solanki et al.; and the sunspot number over the past 7000 years, derived from geomagnetic variations by Usoskin et al. We found the periods and quasi-periods in solar activity, such as about 225, 352, 441, 522 and 561 a, and near 1000 and 2000 a. An approach of wavelet transform was applied to check the two sunspot time series, with emphasis on investigating time-varying characteristics in the long-term fluctuations of solar activity. The results show that the lengths and amplitudes of the periods have changed with time, and large variations have taken place during some periods. solar activity, sunspot, Lomb-Scargle spectrum analysis, wavelet transform

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“…A statistically significant connection between solar activity and geomagnetic activity was found for the reason of influence of solar electric-magnetic radiation (Alania et al, 2004). Magnetic storms during maximum years of solar activity may affect property of faults and gestate great earthquakes in some region (Han et al, 2004). Love and Thomas (2013) studied statistically solar-terrestrial interaction between earthquakes and solar activity.…”

Section: Introductionmentioning

confidence: 99%

Possible Influence of Solar Activity on Global Volcanicity

Ma¹,

Yin²,

Han³

2018

ESR

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Solar activity has been found to be strongly correlated with some geophysical processes on the Earth system. In the present paper, using global dust veil index of volcanic eruptions and sunspot numbers indicating solar activity, the authors investigate the possible influence of solar activity on global volcanicity during 1700–1995. Results of wavelet analysis indicate that variations of global volcanicity have remarkable temporal characteristics, and it is high related to solar activity on about 11-year cycle, with exceeding the 5% statistical significance level against red noise.

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Possible triggering of solar activity to big earthquakes (Ms?8) in faults with near�west-east strike in China

Cited by 32 publications

References 5 publications

Influences of Solar Cycles on Earthquakes

Influences of Solar Cycles on Earthquakes

Long-term variations of solar activity

Possible Influence of Solar Activity on Global Volcanicity

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