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Rapid determination of ME for strong to great shallow earthquakes

Urheber*innen

Di Giacomo,  D.
External Organizations;
GEOFON, Deutsches GeoForschungsZentrum;

/persons/resource/gros

Grosser,  Helmut
2.1 Physics of Earthquakes and Volcanoes, 2.0 Physics of the Earth, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GEOFON, Deutsches GeoForschungsZentrum;

/persons/resource/parolai

Parolai,  Stefano
2.1 Physics of Earthquakes and Volcanoes, 2.0 Physics of the Earth, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GEOFON, Deutsches GeoForschungsZentrum;

Bormann,  P.
External Organizations;
GEOFON, Deutsches GeoForschungsZentrum;

/persons/resource/wang

Wang,  Rongjiang
2.1 Physics of Earthquakes and Volcanoes, 2.0 Physics of the Earth, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GEOFON, Deutsches GeoForschungsZentrum;

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Zitation

Di Giacomo, D., Grosser, H., Parolai, S., Bormann, P., Wang, R. (2008): Rapid determination of ME for strong to great shallow earthquakes. - Geophysical Research Letters, 35, L10308.
https://doi.org/10.1029/2008GL033505


Zitierlink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_237060
Zusammenfassung
We propose a new rapid procedure for determining the energy magnitude Me for shallow events from broadband teleseismic P-wave signals within the distance range 20°–98°. To accomplish this task, we compute spectral amplitude decay functions for different periods using numerical simulations based on the reference Earth model AK135Q. By means of these functions, we correct the spectra of the teleseismic recordings for the propagation path effects, and calculate the radiated seismic energy ES, and hence Me. We use cumulative P-wave windows for simulating a real- or near real-time procedure and test it for 61 shallow earthquakes. The results show that our approach is able to provide a rapid and reliable Me determination within 7–15 minutes after the earthquake origin time, and is therefore suitable for implementation in rapid response systems.