Publication Date:
2023-02-01
Description:
This work deals with a comprehensive multiparametric and multilayer approach to study earthquake-related
processes that occur during the preparation phase of a large earthquake. As a case study, the paper investigates
the M7.2 Kermadec Islands (New Zealand) large earthquake that occurred on June 15, 2019 as the
result of shallow reverse faulting within the Tonga-Kermadec subduction zone. The analyses focused on seismic
(earthquake catalogs), atmospheric (climatological archives) and ionospheric data from ground to space (mainly
satellite) in order to disclose the possible Lithosphere-Atmosphere-Ionosphere Coupling (LAIC). The ionospheric
investigations analysed and compared the Global Navigation Satellite System (GNSS) receiver network with insitu
observations from space thanks to both the European Space Agency (ESA) Swarm constellation and the China
National Space Administration (CNSA in partnership with Italian Space Agency, ASI) satellite dedicated to search
for possible ionospheric disturbances before medium-large earthquakes, i.e. the China Seismo-Electromagnetic
Satellite (CSES-01). An interesting comparison is made with another subsequent earthquake with comparable
magnitude (M7.1) that occurred in Ridgecrest, California (USA) on 6 July of the same year but in a different
tectonic context. Both earthquakes showed anomalies in several parameters (e.g. aerosol, skin temperature and
some ionospheric quantities) that appeared at almost the same times before each earthquake occurrence,
evidencing a chain of processes that collectively point to the moment of the corresponding mainshock. In both
cases, it is demonstrated that a comprehensive multiparametric and multilayer analysis is fundamental to better
understand the LAIC in the occasion of complex phenomena such as earthquakes.
Description:
Published
Description:
113325
Description:
7T. Variazioni delle caratteristiche crostali e "precursori"
Description:
1A. Geomagnetismo e Paleomagnetismo
Description:
2A. Fisica dell'alta atmosfera
Description:
JCR Journal
Repository Name:
Istituto Nazionale di Geofisica e Vulcanologia (INGV)
Type:
article
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