Itoigawa-Shizuoka Tectonic Line Explained

Itoigawa-Shizuoka Tectonic Line
Pushpin Relief:	1
Country:	Japan
Segments:	multiple
Status:	Active
Earthquakes:	Tectonic
Age:	Miocene-Holocene
Embed:	Japanese Active Fault database or search

, also Ito Shizu Sen (糸静線) is a major fault zone on Honshu island running from Itoigawa, Niigata Prefecture, through Lake Suwa, and on to Shizuoka in Shizuoka Prefecture. It is often confused with the Fossa Magna ("great rift"), a geological feature it forms the western boundary of.

Seismic activity

Recent significant earthquakes on this tectonic line include:

M5.4; 30 June 2011; epicentre near Matsumoto, Nagano; 1 death, 17 injuries.^[1] ^[2] ^[3]
M6.7; 22 November 2014; epicentre near Hakuba, Nagano; 46 injuries.^[4] ^[5] ^[6]

http://www.data.jma.go.jp/svd/eqdb/data/shindo/Event.php?ID=182865 Japan Meteorological Agency, Seismic Intensity Database
https://earthquake.usgs.gov/earthquakes/eventpage/pde20110629231640170_10 USGS Database
[:ja:長野県中部地震|Japanese-language Wikipedia entry]
http://www.data.jma.go.jp/svd/eqdb/data/shindo/Event.php?ID=9900950 Japan Meteorological Agency, Seismic Intensity Database
https://earthquake.usgs.gov/earthquakes/eventpage/usb000syza USGS Database
[:ja:長野県北部地震 (2014年)|Japanese-language Wikipedia entry]