Similarities and differences between precursory effects in lithosphere, atmosphere and ionosphere of two large earthquakes with comparable magnitude: the cases of 2019 Kermadec Islands (NZ) and Ridgecrest (USA) earthquakes
Abstract
Two earthquakes of comparable magnitude and in different tectonic contexts occurred in New Zealand (Kermadec Islands) on 15 June 2019 (M7.2) and in California (Ridgecrest) on 6 July 2019 (M7.1). We applied a multiparameter - multilayer approach to lithospheric, atmospheric and ionospheric data, the latter taken from CSES-01 and Swarm satellites, before the two large earthquakes to detect potential pre-earthquake anomalies. In both case studies, we note the following: a) similar precursor times of occurrences, confirming the Rikitake law for which the larger the earthquake magnitude the longer the anticipation time of the precursor and b) a clear acceleration of the possible precursory anomalies before each mainshock, as typical of critical systems approaching a tipping point. An interpretative model is proposed to take into account of the chain of phenomena detected by our approach.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2022
- Bibcode:
- 2022AGUFMNH14C..02D