Rapid Tsunami Potential Assessment Using GNSS Ionospheric Disturbance: Implications from Three Megathrusts

Li，Jiafeng; Chen，Kejie; Chai，Haishan; Wei，Guoguang

2022-05-01

10.3390/rs14092018

Remote Sensing   影响因子和分区

2072-4292

The current tsunami early warning systems always issue alarms once large undersea earthquakes are detected, inevitably resulting in false warnings since there are no deterministic scaling relations between earthquake size and tsunami potential. In this paper, we assess tsunami potential by analyzing co-seismic ionospheric disturbances (CIDs). We examined CIDs of three megathrusts (the 2014 M 8.2 Iquique, the 2015 M 8.3 Illapel, and the recent 2021 M 8.2 Alaska events) as detected by Global Navigation Satellite System (GNSS) observations. We found that CIDs near the epicenter generated by the 2021 M 8.2 Alaska event were significantly weaker than those of the two Chilean events, despite having similar earthquake magnitudes. The propagation direction of CIDs from the M 8.2 Alaska earthquake further revealed ruptures toward the deeper seismogenic zone, implying less seafloor uplift and hazardous flooding. Our work sheds light on incorporating GNSS-based CIDs for more trustworthy tsunami warning systems.

co-seismic ionospheric disturbances Global Navigation Satellite System tsunami early warning

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China[42074024];

Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology

Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology

WOS:000794445800001

MDPI

20221812064076

Communication satellites ; Earthquakes ; Ionosphere ; Ionospheric electromagnetic wave propagation ; Ionospheric measurement ; Tsunamis

Atmospheric Properties:443.1 ; Seawater, Tides and Waves:471.4 ; Seismology:484 ; Communication Satellites:655.2.1 ; Electromagnetic Waves in Different Media:711.1

2-s2.0-85129207382

Scopus

Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen,518000,China

Li，Jiafeng,Chen，Kejie,Chai，Haishan,et al. Rapid Tsunami Potential Assessment Using GNSS Ionospheric Disturbance: Implications from Three Megathrusts[J]. Remote Sensing,2022,14(9).

Li，Jiafeng,Chen，Kejie,Chai，Haishan,&Wei，Guoguang.(2022).Rapid Tsunami Potential Assessment Using GNSS Ionospheric Disturbance: Implications from Three Megathrusts.Remote Sensing,14(9).

Li，Jiafeng,et al."Rapid Tsunami Potential Assessment Using GNSS Ionospheric Disturbance: Implications from Three Megathrusts".Remote Sensing 14.9(2022).