Aftershock observation of the 2003 Tokachi-oki earthquake by using dense ocean bottom seismometer network

Details Aftershock observation of the 2003 Tokachi-oki earthquake by using dense ocean bottom seismometer network Aftershock observation of the 2003 Tokachi-oki earthquake by using dense ocean bottom seismometer network

Mar 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ep%26s...56..295s&link_type=abstract

Earth, Planets and Space, Volume 56, p. 295-300.

Physics

4

Scientific paper

The Tokachi-Oki earthquake occurred on September 26, 2003. Precise aftershock distribution is important to understand the mechanism of this earthquake generation. To study the aftershock activity, we deployed forty-seven ocean bottom seismometers (OBSs) and two ocean bottom pressure meters (OBPs) at thirty-eight sites in the source region. We started the OBS observation four days after the mainshock for an observation period of approximately two months. In the middle of the observation period, nine OBSs near the epicenter of the mainshock were recovered to clarify the depth distribution of aftershocks near the mainshock. From the data overall OBS, seventy-four aftershocks were located with high spatial resolution. Most of the aftershocks were located in a depth range of 15-20 km and occurred within the subducting oceanic crust, the 5.5-km/s layer of the landward plate and the plate boundary. No aftershocks were found in the mantle of the subducting plate. The low seismic activity beneath the trench area where the water depth is greater than about 2000 m suggests a weak coupling between the two plates. The depth of the mainshock is inferred to be 15-20 km from the aftershock distribution.

Affiliated with

Also associated with

No associations

Rating

Aftershock observation of the 2003 Tokachi-oki earthquake by using dense ocean bottom seismometer network does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Aftershock observation of the 2003 Tokachi-oki earthquake by using dense ocean bottom seismometer network, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Aftershock observation of the 2003 Tokachi-oki earthquake by using dense ocean bottom seismometer network will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1133124