Earthquakes by city Japan 100 km
Seismic city profile

Iwatsuki

Iwatsuki, Japan: 1669 earthquakes of magnitude 4.0+ detected within 100 km.

Population
108,833
Residents in the indexed city record.
Earthquakes
1669
Earthquakes at M4.0+ nearby.
Max magnitude
8.0
Strongest recorded event in the current radius.
Timezone
Asia/Tokyo
Coordinates 35.965, 139.696
Nearby activity pulse
Last 30 days
2
Last 12 months
38
Last nearby event: 2026-04-05 23:17 UTC
Strongest nearby event
M 8.0
JP
1923-09-01 02:58 UTC

Map

Earthquakes within 100 km of Iwatsuki

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

Average magnitude
4.6
Average depth
67.9 km

Timeline

Recent seismic activity

Latest 25 events shown
UTC Magnitude Region Depth
2026-04-05 23:17 M 4.0
Tokyo
Japan
138.6 km
2026-04-01 01:06 M 4.9
Kashiwa
Japan
57.2 km
2026-03-15 05:06 M 4.9
Maebashi
Japan
95.6 km
2026-02-15 02:52 M 4.1
Ōta
Japan
68.5 km
2026-02-09 12:27 M 4.3
Ōta
Japan
104.2 km
2026-02-06 15:58 M 4.2
Saitama
Japan
95.2 km
2026-02-05 00:19 M 4.5
Sakura
Japan
60.0 km
2026-01-30 18:47 M 4.3
Mito
Japan
56.9 km
2026-01-25 02:46 M 4.3
Oyama
Japan
82.6 km
2026-01-17 16:49 M 4.3
Chiba
Japan
72.1 km
2025-12-29 21:00 M 4.0
Hitachi-ota
Japan
10.0 km
2025-12-12 10:05 M 4.8
Tsukuba
Japan
62.9 km
2025-11-16 07:03 M 4.2
Mobara
Japan
68.9 km
2025-11-13 21:36 M 4.3
Chiba
Japan
97.4 km
2025-11-11 21:50 M 4.2
Mito
Japan
68.5 km
2025-11-08 21:24 M 4.4
Oyama
Japan
84.1 km
2025-11-04 05:00 M 4.2
Tsukuba
Japan
83.6 km
2025-10-26 13:34 M 4.6
Chiba
Japan
85.4 km
2025-10-26 03:04 M 4.6
Kiryū
Japan
12.4 km
2025-10-24 06:47 M 4.6
Chiba
Japan
76.7 km
2025-10-03 03:48 M 4.5
Kawasaki
Japan
106.4 km
2025-09-08 23:53 M 4.3
Chiba
Japan
66.6 km
2025-09-05 12:00 M 4.2
Saitama
Japan
70.0 km
2025-08-31 21:53 M 4.4
Chiba
Japan
51.8 km
2025-08-28 01:06 M 4.3
Yachiyo
Japan
50.6 km

Monthly profile

Recent monthly trend

2025-08 2 events
2025-09 2 events
2025-10 4 events
2025-11 5 events
2025-12 2 events
2026-01 3 events
2026-02 4 events
2026-03 1 events
2026-04 2 events

Historic snapshot

Earthquakes history

1
1909
2
1921
1
1922
4
1923
2
1924
1
1927
2
1928
1
1929
1
1930
4
1931
1
1938
2
1949
2
1951
1
1952
1
1955
2
1956
3
1965
1
1967
1
1968
1
1969
3
1971
20
1973
11
1974
21
1975
15
1976
16
1977
15
1978
10
1979
23
1980
14
1981
23
1982
35
1983
25
1984
34
1985
16
1986
26
1987
24
1988
21
1989
27
1990
18
1991
22
1992
7
1993
16
1994
23
1995
29
1996
22
1997
20
1998
17
1999
23
2000
25
2001
20
2002
24
2003
32
2004
57
2005
37
2006
39
2007
42
2008
16
2009
18
2010
91
2011
60
2012
36
2013
51
2014
53
2015
58
2016
46
2017
31
2018
31
2019
40
2020
39
2021
52
2022
51
2023
58
2024
42
2025
10
2026
Year Max magnitude Earthquakes
2026 M 4.9 10
2025 M 4.9 42
2024 M 5.2 58
2023 M 6.1 51
2022 M 5.0 52
2021 M 5.9 39
2020 M 5.3 40
2019 M 5.1 31
2018 M 5.3 31
2017 M 5.1 46
2016 M 5.4 58
2015 M 5.2 53
2014 M 5.5 51
2013 M 5.6 36
2012 M 6.0 60
2011 M 6.2 91
2010 M 5.1 18
2009 M 5.1 16
2008 M 5.2 42
2007 M 5.2 39
2006 M 5.1 37
2005 M 5.9 57
2004 M 5.8 32
2003 M 5.4 24
2002 M 4.9 20
2001 M 5.0 25
2000 M 6.2 23
1999 M 5.4 17
1998 M 5.7 20
1997 M 5.2 22
1996 M 5.6 29
1995 M 5.3 23
1994 M 5.1 16
1993 M 5.2 7
1992 M 5.8 22
1991 M 5.1 18
1990 M 6.3 27
1989 M 6.1 21
1988 M 5.6 24
1987 M 6.7 26
1986 M 5.1 16
1985 M 5.9 34
1984 M 5.4 25
1983 M 5.9 35
1982 M 5.6 23
1981 M 5.2 14
1980 M 6.0 23
1979 M 5.4 10
1978 M 5.7 15
1977 M 5.4 16
1976 M 5.4 15
1975 M 5.3 21
1974 M 5.6 11
1973 M 5.9 20
1971 M 5.5 3
1969 M 5.7 1
1968 M 6.1 1
1967 M 5.5 1
1965 M 5.7 3
1956 M 6.3 2
1955 M 5.9 1
1952 M 6.0 1
1951 M 6.1 2
1949 M 6.3 2
1938 M 5.5 1
1931 M 6.5 4
1930 M 5.7 1
1929 M 6.2 1
1928 M 5.9 2
1927 M 5.6 1
1924 M 7.0 2
1923 M 8.0 4
1922 M 6.3 1
1921 M 6.4 2
1909 M 5.8 1