+ Site Statistics
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Rupture process of the 2008 Iwate-Miyagi Nairiku, Japan, earthquake derived from near-source strong-motion records



Rupture process of the 2008 Iwate-Miyagi Nairiku, Japan, earthquake derived from near-source strong-motion records



Bulletin of the Seismological Society of America 100.1



We derive the rupture process of the 2008 Iwate-Miyagi Nairiku, Japan, earthquake (M(JMA) 7.2), during which the largest ground acceleration to date, namely, 4022 cm/sec2 , was recorded at a hanging-wall station, IWTH25 station of KiK-net, just above the hypocenter. Velocity waveform data (0.1-1 Hz) at 14 strong-motion stations of K-NET and KiK-net, including the borehole records of IWTH25, are inverted using the multi-time-window linear waveform inversion method. We assume a horizontally layered velocity structure model having low-velocity subsurface layers for each station in order to calculate the Green"s functions. The waveform inversion indicates that there are two major slip patches. One patch extends from the hypocenter to the southern shallower part of the fault. A particularly large slip area in this patch is centered approximately 8 km to the south of the hypocenter with a maximum slip of 6.2 m, the area ruptured between 4 and 9 sec after the initial break. The other patch with smaller slip is located in the northern part, which broke after the rupture of the southern slip patch. The initial 0-4 sec rupture occurred beneath IWTH25, contributing to the synthesis of a distinctive upward velocity pulse at this station. Examination of the slip contribution to the synthetic velocity waveforms and comparison of the isochrones with the slip distribution suggest that a peak acceleration greater than 4000 cm/sec2 observed at IWTH25 was generated from the area that is closest to the hypocenter in the southern particularly large slip area.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 037147863

Download citation: RISBibTeXText

DOI: 10.1785/0120090043


Related references

Source rupture process of the 2008 Iwate-Miyagi Nairiku, Japan, earthquake revealed from near fault strong motion records. Eos, Transactions, American Geophysical Union 89.53, Suppl., 2008

Kinematic source rupture process of the 2008 Iwate-Miyagi Nairiku earthquake, a Mw 69 thrust earthquake in northeast Japan, using strong motion data. Eos, Transactions, American Geophysical Union 89.53, Suppl., 2008

Imaging of the first five seconds in the rupture process of the 2008 Iwate-Miyagi Nairiku Inland, Japan earthquake from the local strong-motion records. Eos, Transactions, American Geophysical Union 89.53, Suppl., 2008

Rupture process of the 2008 Iwate-Miyagi Nairiku earthquake Mj 72, Japan, inferred from strong motion and geodetic data. Eos, Transactions, American Geophysical Union 89.53, Suppl., 2008

Simulation of a strong ground motion exceeding 4G during the 2008 Iwate-Miyagi Nairiku earthquake, Japan. Eos, Transactions, American Geophysical Union 89.53, Suppl., 2008

Ability of 1-Hz GPS data to infer the source process of a medium-sized earthquake; the case of the 2008 Iwate-Miyagi Nairiku, Japan, earthquake. Geophysical Research Letters 36.12, 2009

The slapdown phase in the strong motion record for the 2008 Iwate-Miyagi Nairiku earthquake. Eos, Transactions, American Geophysical Union 90.52, Suppl., 2009

Surface rupture of the 2008 Iwate-Miyagi Nairiku earthquake observed at Oshu and Ichinoseki cities, Iwate Prefecture, northeast Japan. Journal of Geography 119.5: 826-840, 2010

Ground-based LiDAR mapping of surface rupture associated with the 2008 Iwate-Miyagi Nairiku, Japan earthquake Mw 69. Eos, Transactions, American Geophysical Union 89.53, Suppl., 2008

Dynamic fault rupture model of the 2008 Iwate-Miyagi Nairiku earthquake, Japan; role of rupture velocity changes on extreme ground motions. Eos, Transactions, American Geophysical Union 90.52, Suppl., 2009

Surface rupture connecting deep-seated landslides of the Mw69 14 June 2008 Iwate-Miyagi Nairiku, NE Japan, earthquake. Eos, Transactions, American Geophysical Union 89.53, Suppl., 2008

Physical source modeling for the 2008 Iwate-Miyagi Nairiku, Japan, earthquake; the effects of frictional heterogeneity due to geothermal anomaly near volcanoes. U. S. Geological Survey: 51, 2008

A new BIEM for rupture dynamics in half-space and its application to the 2008 Iwate-Miyagi Nairiku earthquake. Geophysical Journal International 184.1, 2011

Slip distribution of the 2008 Iwate-Miyagi Nairiku, Japan, earthquake inverted from PALSAR data. Eos, Transactions, American Geophysical Union 89.53, Suppl., 2008

Temporal variation of strain field around the Dedana Fault in NE Japan, before and after the 2008 Iwate-Miyagi Nairiku earthquake M72. Eos, Transactions, American Geophysical Union 89.53, Suppl., 2008