Earthquakes by city Japan 100 km
Seismic city profile

Ryōgoku

Ryōgoku, Japan: 2734 earthquakes of magnitude 4.0+ detected within 100 km.

Population
49,735
Residents in the indexed city record.
Earthquakes
2734
Earthquakes at M4.0+ nearby.
Max magnitude
7.9
Strongest recorded event in the current radius.
Timezone
Asia/Tokyo
Coordinates 35.717, 140.367
Nearby activity pulse
Last 30 days
2
Last 12 months
49
Last nearby event: 2026-04-05 23:17 UTC
Strongest nearby event
M 7.9
JP
2011-03-11 06:15 UTC

Map

Earthquakes within 100 km of Ryōgoku

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

Average magnitude
4.6
Average depth
54.1 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
2026-02-26 11:55 M 4.4
Kamisu
Japan
40.8 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
2026-01-30 18:47 M 4.3
Mito
Japan
56.9 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
2025-11-11 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
2025-10-24 06:47 M 4.6
Chiba
Japan
76.7 km

Monthly profile

Recent monthly trend

2025-10 2 events
2025-11 5 events
2025-12 1 events
2026-01 8 events
2026-02 7 events
2026-04 2 events

Historic snapshot

Earthquakes history

1
1909
1
1911
2
1921
2
1922
3
1923
2
1924
1
1925
2
1926
2
1928
2
1929
4
1930
2
1931
1
1932
2
1935
1
1937
2
1938
1
1940
1
1941
1
1946
2
1948
1
1950
2
1951
1
1952
1
1954
1
1955
3
1956
1
1961
1
1962
1
1963
3
1965
2
1967
1
1968
1
1969
3
1971
36
1973
26
1974
25
1975
11
1976
26
1977
28
1978
17
1979
28
1980
25
1981
45
1982
42
1983
33
1984
40
1985
24
1986
38
1987
35
1988
29
1989
37
1990
24
1991
31
1992
13
1993
28
1994
27
1995
32
1996
29
1997
30
1998
21
1999
35
2000
30
2001
25
2002
42
2003
48
2004
67
2005
47
2006
62
2007
63
2008
28
2009
26
2010
401
2011
116
2012
70
2013
91
2014
75
2015
77
2016
66
2017
68
2018
55
2019
66
2020
46
2021
73
2022
79
2023
79
2024
45
2025
17
2026
Year Max magnitude Earthquakes
2026 M 4.9 17
2025 M 4.9 45
2024 M 5.2 79
2023 M 6.1 79
2022 M 5.1 73
2021 M 5.9 46
2020 M 5.9 66
2019 M 5.2 55
2018 M 5.9 68
2017 M 5.4 66
2016 M 5.4 77
2015 M 5.2 75
2014 M 5.5 91
2013 M 5.6 70
2012 M 6.0 116
2011 M 7.9 401
2010 M 5.1 26
2009 M 5.8 28
2008 M 5.2 63
2007 M 5.2 62
2006 M 5.1 47
2005 M 6.3 67
2004 M 6.0 48
2003 M 5.7 42
2002 M 5.5 25
2001 M 5.2 30
2000 M 6.2 35
1999 M 5.4 21
1998 M 5.7 30
1997 M 5.2 29
1996 M 6.2 32
1995 M 6.0 27
1994 M 5.1 28
1993 M 5.3 13
1992 M 5.8 31
1991 M 6.0 24
1990 M 6.3 37
1989 M 6.1 29
1988 M 5.7 35
1987 M 6.7 38
1986 M 5.3 24
1985 M 5.9 40
1984 M 5.4 33
1983 M 5.9 42
1982 M 5.6 45
1981 M 5.6 25
1980 M 6.0 28
1979 M 5.5 17
1978 M 5.9 28
1977 M 5.5 26
1976 M 5.0 11
1975 M 5.3 25
1974 M 5.8 26
1973 M 5.9 36
1971 M 5.5 3
1969 M 5.6 1
1968 M 6.1 1
1967 M 5.8 2
1965 M 5.7 3
1963 M 6.3 1
1962 M 5.8 1
1961 M 5.9 1
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
1948 M 6.3 2
1946 M 6.0 1
1941 M 6.0 1
1940 M 6.2 1
1938 M 6.2 2
1937 M 6.4 1
1935 M 5.7 2
1932 M 6.0 1
1931 M 6.1 2
1930 M 6.2 4
1929 M 6.2 2
1928 M 5.9 2
1926 M 5.7 2
1925 M 5.7 1
1924 M 7.0 2
1923 M 7.9 3
1922 M 6.3 2
1921 M 6.4 2
1911 M 6.6 1
1909 M 5.8 1