Abstract
Historical earthquakes registered in Chile (from 1900 up to 2015) with epicenters located between 17?30'S and 56?0'S latitude and yearly mean total sunspot number have been considered in order to evaluate a significant linkage between them. The occurrence of strong earthquakes along Chile and the sunspots activity are analyzed to inspect possible influence of solar cycles on earthquakes. The cross wavelet transform and wavelet coherence analysis were applied for sequences of sunspots and earthquakes activity. An 8 - 12 years modulation of earthquakes activity has been identified.
Highlights
Many terrestrial processes show trends and changes in the long-term: global temperature, geomagnetic activity and Earth’s rotation
It can conclude that wavelets provide a new tool for the comparition of the periods of earthquakes activity and solar activity
It could be a possible qualitative mechanism caused by solar activity that would influence seismic activity
Summary
Many terrestrial processes show trends and changes in the long-term: global temperature, geomagnetic activity and Earth’s rotation. It is a challenge to find a relationship between them and to identify possible extraterrestrial factors that may contribute to these changes in the long-term. The major source of energy near the Earth is the Sun, it is natural to think about a connection between different elements of solar activity and terrestrial processes. The aim of this work is to find statistical relationships between the number of sunspots and earthquakes in Chile. One example is the largest earthquake of magnitude Ms = 9.5 which occurred in Valdivia on May 22, 1960 (the largest in the history of mankind), originated due to the sudden movement of the Nazca plate beneath the South American plate. One destructive earthquake occurred every ten years in the last century [1]
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