Earthquakes by city Japan 100 km
Seismic city profile

Ichihara

Ichihara, Japan: 2233 earthquakes of magnitude 4.0+ detected within 100 km.

Population
283,531
Residents in the indexed city record.
Earthquakes
2233
Earthquakes at M4.0+ nearby.
Max magnitude
8.0
Strongest recorded event in the current radius.
Timezone
Asia/Tokyo
Coordinates 35.517, 140.083
Nearby activity pulse
Last 30 days
2
Last 12 months
39
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 Ichihara

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

Average magnitude
4.6
Average depth
57.6 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
2026-03-28 10:36 M 4.1
Fujisawa
Japan
74.4 km
2026-02-19 08:24 M 4.4
Isumi
Japan
10.0 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
2026-02-03 18:36 M 4.1
Hasaki
Japan
34.9 km
2026-01-29 02:47 M 4.0
Tateyama
Japan
26.6 km
2026-01-29 01:40 M 4.4
Tateyama
Japan
40.2 km
2026-01-29 01:25 M 4.4
Tateyama
Japan
19.8 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
2026-01-14 02:50 M 4.3
Hasaki
Japan
37.3 km
2026-01-09 11:07 M 4.4
Mobara
Japan
28.4 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
2025-11-08 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
2025-10-24 06:47 M 4.6
Chiba
Japan
76.7 km
2025-10-03 03:48 M 4.5
Kawasaki
Japan
106.4 km
2025-10-03 03:37 M 4.4
Tateyama
Japan
52.0 km

Monthly profile

Recent monthly trend

2025-10 4 events
2025-11 4 events
2025-12 1 events
2026-01 7 events
2026-02 6 events
2026-03 1 events
2026-04 2 events

Historic snapshot

Earthquakes history

1
1909
2
1921
1
1922
6
1923
2
1924
2
1926
2
1928
1
1929
3
1930
5
1931
2
1935
1
1938
1
1941
1
1950
2
1951
1
1952
1
1954
1
1955
3
1956
3
1965
2
1967
1
1968
3
1971
32
1973
16
1974
22
1975
14
1976
25
1977
24
1978
16
1979
26
1980
18
1981
33
1982
40
1983
27
1984
36
1985
18
1986
36
1987
32
1988
30
1989
29
1990
22
1991
26
1992
14
1993
25
1994
23
1995
33
1996
27
1997
25
1998
16
1999
31
2000
24
2001
24
2002
31
2003
36
2004
58
2005
50
2006
52
2007
47
2008
24
2009
19
2010
241
2011
90
2012
56
2013
71
2014
65
2015
70
2016
55
2017
52
2018
52
2019
51
2020
45
2021
63
2022
65
2023
76
2024
37
2025
16
2026
Year Max magnitude Earthquakes
2026 M 4.9 16
2025 M 4.8 37
2024 M 5.2 76
2023 M 6.1 65
2022 M 5.0 63
2021 M 5.9 45
2020 M 5.9 51
2019 M 5.2 52
2018 M 5.9 52
2017 M 5.4 55
2016 M 5.4 70
2015 M 5.1 65
2014 M 6.0 71
2013 M 5.6 56
2012 M 6.0 90
2011 M 6.2 241
2010 M 5.1 19
2009 M 5.8 24
2008 M 5.1 47
2007 M 5.2 52
2006 M 5.1 50
2005 M 5.9 58
2004 M 5.8 36
2003 M 5.7 31
2002 M 5.4 24
2001 M 5.0 24
2000 M 6.2 31
1999 M 5.4 16
1998 M 5.7 25
1997 M 5.2 27
1996 M 6.2 33
1995 M 5.3 23
1994 M 5.1 25
1993 M 5.2 14
1992 M 5.8 26
1991 M 6.0 22
1990 M 6.3 29
1989 M 6.1 30
1988 M 5.7 32
1987 M 6.7 36
1986 M 6.6 18
1985 M 5.9 36
1984 M 5.4 27
1983 M 5.9 40
1982 M 5.4 33
1981 M 5.6 18
1980 M 6.0 26
1979 M 5.5 16
1978 M 5.9 24
1977 M 5.5 25
1976 M 5.0 14
1975 M 5.3 22
1974 M 5.8 16
1973 M 5.9 32
1971 M 5.5 3
1968 M 6.1 1
1967 M 5.8 2
1965 M 5.7 3
1956 M 6.3 3
1955 M 5.9 1
1954 M 6.3 1
1952 M 6.0 1
1951 M 6.1 2
1950 M 6.1 1
1941 M 6.0 1
1938 M 5.5 1
1935 M 5.7 2
1931 M 6.5 5
1930 M 6.2 3
1929 M 6.2 1
1928 M 5.9 2
1926 M 5.7 2
1924 M 7.0 2
1923 M 8.0 6
1922 M 6.3 1
1921 M 6.4 2
1909 M 5.8 1