Damage survey report for the 2019 Yamagata earthquake
31
Jim Mori 2019 Damage survey report for the 2019 Yamagata earthquake
Transcript of Damage survey report for the 2019 Yamagata earthquake
Jim Mori
2019
Damage survey report
for the 2019 Yamagata earthquake
7 2 July 2
→ →→ → (NIG006)
7 3 July 3
→ → (YMT004)
→ → (YMT003)
→ →
7 4 July 4
→ →
Jim Mori
Survey Schedule
5-
6+
6-
5+
(NIG006)
(YMT004)
(JMA)
4
5-
YMT003)
5+
(JMA)
5-
6-
YMTH13
Intensity Map
( Web)
Intensity
Map
Downtown
Murakami
Downtown
Tsuruoka
Koiwagawa
Fuya 6+
Atsumigawa 6-
2019 Yamagata (JMA atsumigawa)
2016 Kumamoto (Mashiki city hall)
2018 Iburi (K-NET HKD126)
2018 Osaka (K-NET OSK002)
2019 Yamagata (K-NET YMT004)
Acc. Resp. Spectra (EW comp.)
Period (s)
Accele
ratio
n R
esp
onse Sp
ectra (c
m/s
/s)
Damage
http://www.bousai.go.jp/pdf/r10619_jishin_yamagata5.pdf
|Atsumi, YMT004 (JMA intensity 5+)
Fall of roof tiles (<5%)
Collapse of block wall
Fall of mortar wall
|Atsumi, YMT004 (JMA intensity 5+)
Ambient noise measurement
at the YMT004 station
--- EW
--- NS
--- average
Ohiwagawa (no intensity info)
Fall of roof tiles (<5%)
Collapse of block wall
Corrosion of reinforcement
Ohiwagawa (no intensity info)
Ambient noise measurement
near the post office
--- EW
--- NS
--- average
Fall of roof tiles (30%)
Collapse of block wall
Fall of mortar wall
Tilt of old storage houses
Corrosion of reinforcement
Koiwagawa (no intensity info)
Koiwagawa (no intensity info)
Fall of roof tiles (30%)
Collapse of block wall
Fall of mortar wall
Tilt of old storage houses
Corrosion of reinforcement
Koiwagawa (no intensity info)
Saikoji (collapsed ratio 33%)
Koiwagawa
--- EW
--- NS
--- average
Nezugaseki (no intensity info)
Fall of roof tiles (10%)
Collapse of block wall
Hair crack on the wall
Corrosion of reinforcement
Nezugaseki (no intensity info)
Ambient noise measurement
near the JR station
--- EW
--- NS
--- average
Fuya (JMA intensity 6+)
Fall of roof tiles (<5%)
Fall of the ceiling of the gym
Collapse of the embankment
of the gym
Fuya (JMA intensity 6+)
--- EW
--- NS
--- average
Town hall
Gym
Seismometer
Fuya (JMA intensity 6+)
Fuya Koiwagawa
Kouganji (1%)
Fuya (JMA intensity 6+)
Atusumigawa (JMA intensity 6-)
Middle of large field
Small landslide nearby
Very minor damage in
nearby town
Seismic station
--- EW
--- NS
--- average
YMT003
JMA
Web
YMT003JMA
Web
YMT003
JMA
Google street view 2012
Truruoka, YMT003 (JMA intensity 5+)
Fall of roof tiles (<1%)
Collapse of sumo field
Liquefaction in front of the
main station
https://www.yomiuri.co.jp/local/yamagata/news/20190619-
OYTNT50235/
Before EQ
Truruoka, YMT003 (JMA intensity 5+)
--- EW
--- NS
--- average
Conclusion
Heavily damaged towns
Koiwagawa>Nezugaseki>Ohiwagawa=Fuya(JMA6+)
Liquefaction and collapse of sumo field are unusual damage
in Tsuruoka city. The damage in general was less than coastal
towns.
Damage in Nezugaseki is similar to that in Ibaraki city during
2018 Osaka EQ. The disaster may be more serious if the EQ
happens in a large city.
Koiwagawa town
https://youtu.be/_C0IYvvgHuk
Fuya town, ver.1
https://youtu.be/zGsRyv9x3os
Fuya town, ver.2
https://youtu.be/II-JvPjQqOE
Movie Link
We thank JMA and NIED for providing strong motion data.
We acknowledge local people for supporting our survey.
We used the topographical map provided by Geospatial
Information Authority of Japan.
Acknowledgement
