Geotechnical Distinction of Landslides Induced by Near-Field Earthquakes in Niigata, Japan

Table 3

Comparisons of earthquakes.

	Mid-Niigata	Mid-Niigata Offshore	Northern Nagano
Date	23 Oct. 2004	16 July 2007	12 March 2011
Epicentre	Chuetsu area	Chuetsu offshore	Northern Nagano
Depth	13 km depth	17 km depth	8 km depth
Cause	Thrust fault	Thrust fault	Thrust fault
Magnitude	M6.8	M6.8	M6.7
JMA intensity	7 (at Kawaguchi)	6 upper (at Kashiwazaki)	6 upper (Sakae)
Max.; acceleration	1750.2 gal; (at Tokamachi)	812.7 gal; (at Kashiwazaki)	803.5 gal; (at Tsunan)
Aftershock	Frequent	Rare	Rare
Landslides	Thousands	Medium	Medium