Earthquakes by city Japan 100 km
Seismic city profile

Nagano

Nagano, Japan: 385 earthquakes of magnitude 4.0+ detected within 100 km.

Population
372,760
Residents in the indexed city record.
Earthquakes
385
Earthquakes at M4.0+ nearby.
Max magnitude
6.6
Strongest recorded event in the current radius.
Timezone
Asia/Tokyo
Coordinates 36.650, 138.183
Nearby activity pulse
Last 30 days
2
Last 12 months
5
Last nearby event: 2026-04-18 05:54 UTC
Strongest nearby event
M 6.6
JP
2004-10-23 08:56 UTC

Map

Earthquakes within 100 km of Nagano

The map centers on Nagano and highlights the most recent earthquakes detected within 100 km.

Average magnitude
4.6
Average depth
62.9 km

Timeline

Recent seismic activity

Latest 5 events shown
UTC Magnitude Region Depth
2026-04-18 05:54 M 4.9
Chikuma
Japan
10.0 km
2026-04-18 04:20 M 4.9
Chikuma
Japan
10.0 km
2026-01-15 05:48 M 5.1 Matsumoto
Japan
2.3 km
2026-01-15 05:40 M 4.7
Azumino
Japan
7.8 km
2025-08-23 10:22 M 4.1
Chichibu
Japan
129.5 km

Monthly profile

Recent monthly trend

2025-08 1 events
2026-01 2 events
2026-04 2 events

Historic snapshot

Earthquakes history

Year Max magnitude Earthquakes
2026 M 5.1 4
2025 M 4.8 5
2024 M 4.9 4
2023 M 4.3 1
2022 M 4.5 6
2021 M 5.1 8
2020 M 5.2 15
2019 M 4.6 3
2018 M 5.1 4
2017 M 5.1 4
2016 M 4.9 8
2015 M 4.9 7
2014 M 6.2 16
2013 M 5.8 8
2012 M 4.8 6
2011 M 6.2 29
2010 M 4.6 4
2009 M 4.6 2
2008 M 4.4 6
2007 M 5.7 10
2006 M 4.3 4
2005 M 4.9 15
2004 M 6.6 77
2003 M 4.4 4
2002 M 4.7 7
2001 M 5.3 8
2000 M 4.4 4
1999 M 4.9 1
1998 M 5.5 15
1997 M 4.2 3
1996 M 4.7 3
1995 M 4.5 4
1993 M 4.8 7
1992 M 4.5 1
1991 M 5.2 4
1990 M 5.3 21
1989 M 4.7 1
1988 M 4.7 3
1987 M 5.7 8
1986 M 5.6 6
1984 M 4.9 2
1983 M 5.1 4
1982 M 4.5 1
1981 M 5.4 5
1979 M 4.3 1
1978 M 4.3 2
1977 M 5.4 2
1976 M 5.4 4
1975 M 4.9 1
1973 M 4.4 1
1971 M 5.7 2
1968 M 5.6 1
1967 M 5.7 2
1966 M 5.8 7
1941 M 6.3 1
1934 M 5.7 1
1933 M 6.0 1
1918 M 6.1 1