Small pressure drop triggered near a fault by small teleseismic waves

Details Small pressure drop triggered near a fault by small teleseismic waves Small pressure drop triggered near a fault by small teleseismic waves

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007e%26psl.258..207d&link_type=abstract

Earth and Planetary Science Letters, Volume 258, Issue 1-2, p. 207-218.

Computer Science

3

Scientific paper

We describe a pressure transient triggered near an active fault by seismic waves generated more than 10 000 km away during the 2003 Mw = 7.8 Rat Island earthquake. In contrast with previous similar observations, the pressure drop occurs simultaneously with the arrival of S waves, and not during the passage of the Rayleigh waves that have larger amplitudes and smaller frequencies. This small 60 Pa drop is compatible with a small slip on the fault, which induced either dilatant damage or a transient disruption in the impermeable barrier the fault constitutes.

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