2008 iwate miyagi nairiku earthqukae
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2008 Iwate-Miyagi Nairiku Earthqukae. 2008.06.14 08:43 Lat.N=38d 01.7m, Long.E=140d 52.8m Focal depth=8km Mjma=7.2 Max Ijm=6 high. Location of stations, Blue circle indicates a station where the Max PGA of 4G was observed.

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2008 iwate miyagi nairiku earthqukae
2008 Iwate-Miyagi Nairiku Earthqukae
  • 2008.06.14 08:43
  • Lat.N=38d 01.7m, Long.E=140d 52.8m
  • Focal depth=8km
  • Mjma=7.2
  • Max Ijm=6 high
slide2

Location of stations, Blue circle indicates a station where the Max PGA of 4G was observed.

Inversion of dislocation with records at NIED stations indicated by dark dotts. Red star is the epicenter

http://www.k-net.bosai.go.jp/k-net/topics/Iwatemiyaginairiku_080614/inversion/

slide3

Aftershock locations with red circle and fault model with source mechanisms

Hi-net mechanism from head wave and F-net from wave form inversion

http://www.k-net.bosai.go.jp/k-net/topics/Iwatemiyaginairiku_080614/inversion/Figs/fig1.html

slide4

Source inversion by tele-seismic observation

http://taro.eri.u-tokyo.ac.jp/saigai/iwate/index.html#A

slide5

Image of geological section with hypocenter

http://www.eri.u-tokyo.ac.jp/topics/Iwate2008/tectonics.html

slide6

Distribution of PGA and PGV

http://www.k-net.bosai.go.jp/k-net/topics/Iwatemiyaginairiku_080614/Iwatemiyaginairiku_080614_kyoshin.htm

slide8

Record of extremely large PGA of 4G

http://www.k-net.bosai.go.jp/k-net/topics/Iwatemiyaginairiku_080614/IWTH25_NIED.pdf

slide10

Soil profile of the station

http://www.kik.bosai.go.jp/kik/ftppub/sitepdf/IWTH25-J.pdf

slide11

http://www.jishin.go.jp/main/chousa/08jun_iwate_miyagi/p11.jpghttp://www.jishin.go.jp/main/chousa/08jun_iwate_miyagi/p11.jpg

Expected events for active faults,

Epicenter is indicated with red circle.

Lines are the active faults and dark circles are event epicenters.

slide12

Dislocation observed by GPS

http://www.gsi.go.jp/BOUSAI/h20-iwatemiyagi/080614siryou1.pdf

slide13

Active fault are indicated with red lines and epicenter is indicated with a yellow star.

http://www.jishin.go.jp/main/oshirase/20080614_iwate_miyagi.htm

slide14

Satellite image with red cross for epicenter

Parts A and B are location where the representative land slides were occurred.

http://www.jaxa.jp/projects/sat/alos/index_j.html

slide15

Satellite images before (right) and after (left) the events

A natural dam is existing in the left panel, so a lake appears.

http://www.jaxa.jp/projects/sat/alos/img/topics_20080615_2l_j.jpg

slide16

Natural dam

Picture from Yomiuri Newspaper

slide17

Satellite images before (right) and after (left) the events

A largest land slide is existing in the left panel of 60,000,000m2

http://www.jaxa.jp/projects/sat/alos/img/topics_20080615_3l_j.jpg

slide20

Fault rupture found by Prof Otsuki, Tohoku Univ.

http://www.chunichi.co.jp/article/feature/ntok0021/list/200806/CK2008061602000194.html

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