How Fast Can We Reliably Estimate the Magnitude of Subduction Earthquakes?
Author
dc.contributor.author
Leyton, F.
Author
dc.contributor.author
Ruiz Tapia, Sergio
Author
dc.contributor.author
Baez, J.
Author
dc.contributor.author
Meneses, G.
Author
dc.contributor.author
Madariaga, R.
Admission date
dc.date.accessioned
2019-05-31T15:21:04Z
Available date
dc.date.available
2019-05-31T15:21:04Z
Publication date
dc.date.issued
2018
Cita de ítem
dc.identifier.citation
Geophysical Research Letters, Volumen 45, Issue 18, 2018, Pages 9633-9641.
Identifier
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19448007
Identifier
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00948276
Identifier
dc.identifier.other
10.1029/2018GL078991
Identifier
dc.identifier.uri
https://repositorio.uchile.cl/handle/2250/169493
Abstract
dc.description.abstract
Fast and reliable characterization of earthquakes can provide vital information to the population, even reducing the effects of strong shaking produced by them. In this study, we explore the minimum time required to estimate the magnitude for subduction earthquakes. Using traditional P wave earthquake early warning parameters and considering a progressively increasing time window, we are able to estimate magnitude for subduction earthquakes ~30 s from the origin time (with an average residual of 0.01 ± 0.28). However, estimations for larger events (Mw ≥ 7.5) present larger errors (average residual of −0.70 ± 0.30). We complement our data with Global Navigational Satellite System observations for these events, enabling magnitude estimations ~70 s from the origin time (average residual of −0.42 ± 0.41). We propose that
rapid estimations of magnitude should consider, initially, P waves in a progressively increasing time window,
and complemented with GNSS data, for large events.