Earthquakes by city Japan 100 km
Seismic city profile

Yōkaichiba

Yōkaichiba, Japan: 2971 earthquakes of magnitude 4.0+ detected within 100 km.

Population
32,651
Residents in the indexed city record.
Earthquakes
2971
Earthquakes at M4.0+ nearby.
Max magnitude
7.9
Strongest recorded event in the current radius.
Timezone
Asia/Tokyo
Coordinates 35.700, 140.550
Nearby activity pulse
Last 30 days
2
Last 12 months
47
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 Yōkaichiba

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

Average magnitude
4.6
Average depth
51.4 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
2026-02-06 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
2025-10-03 03:48 M 4.5
Kawasaki
Japan
106.4 km
2025-09-19 18:02 M 4.6
Mito
Japan
38.9 km

Monthly profile

Recent monthly trend

2025-09 1 events
2025-10 3 events
2025-11 5 events
2025-12 1 events
2026-01 8 events
2026-02 5 events
2026-04 2 events

Historic snapshot

Earthquakes history

1
1909
1
1911
2
1921
2
1922
4
1923
2
1924
1
1925
2
1926
3
1928
1
1929
4
1930
2
1931
1
1932
2
1935
2
1937
2
1938
1
1940
1
1941
1
1946
1
1947
2
1948
1
1950
2
1951
1
1952
1
1953
1
1954
2
1955
3
1956
2
1961
1
1962
3
1963
2
1964
3
1965
2
1967
1
1969
4
1971
41
1973
35
1974
28
1975
14
1976
27
1977
32
1978
18
1979
30
1980
27
1981
55
1982
44
1983
38
1984
43
1985
28
1986
38
1987
35
1988
31
1989
40
1990
26
1991
33
1992
18
1993
28
1994
29
1995
33
1996
30
1997
33
1998
19
1999
36
2000
35
2001
26
2002
45
2003
56
2004
71
2005
51
2006
67
2007
75
2008
29
2009
31
2010
468
2011
124
2012
74
2013
94
2014
77
2015
79
2016
64
2017
72
2018
58
2019
66
2020
58
2021
74
2022
85
2023
77
2024
44
2025
15
2026
Year Max magnitude Earthquakes
2026 M 4.9 15
2025 M 4.9 44
2024 M 5.2 77
2023 M 6.1 85
2022 M 5.1 74
2021 M 5.9 58
2020 M 5.9 66
2019 M 5.2 58
2018 M 5.9 72
2017 M 5.4 64
2016 M 5.4 79
2015 M 5.2 77
2014 M 5.5 94
2013 M 5.6 74
2012 M 6.1 124
2011 M 7.9 468
2010 M 5.1 31
2009 M 5.8 29
2008 M 5.2 75
2007 M 5.2 67
2006 M 5.7 51
2005 M 6.3 71
2004 M 6.0 56
2003 M 5.7 45
2002 M 5.5 26
2001 M 5.2 35
2000 M 6.2 36
1999 M 5.4 19
1998 M 5.7 33
1997 M 5.2 30
1996 M 6.2 33
1995 M 6.0 29
1994 M 5.1 28
1993 M 5.8 18
1992 M 5.3 33
1991 M 6.0 26
1990 M 6.3 40
1989 M 6.1 31
1988 M 5.7 35
1987 M 6.7 38
1986 M 6.2 28
1985 M 5.9 43
1984 M 5.4 38
1983 M 5.9 44
1982 M 5.6 55
1981 M 5.6 27
1980 M 6.0 30
1979 M 5.5 18
1978 M 5.9 32
1977 M 5.5 27
1976 M 5.5 14
1975 M 5.9 28
1974 M 6.0 35
1973 M 5.9 41
1971 M 5.5 4
1969 M 5.6 1
1967 M 5.8 2
1965 M 5.7 3
1964 M 6.3 2
1963 M 6.3 3
1962 M 5.8 1
1961 M 5.9 2
1956 M 6.3 3
1955 M 5.9 2
1954 M 6.3 1
1953 M 6.3 1
1952 M 6.0 1
1951 M 6.1 2
1950 M 6.1 1
1948 M 6.3 2
1947 M 5.9 1
1946 M 6.0 1
1941 M 6.0 1
1940 M 6.2 1
1938 M 6.2 2
1937 M 6.4 2
1935 M 5.7 2
1932 M 6.0 1
1931 M 6.1 2
1930 M 6.2 4
1929 M 5.8 1
1928 M 6.1 3
1926 M 5.7 2
1925 M 5.7 1
1924 M 7.1 2
1923 M 7.9 4
1922 M 6.3 2
1921 M 6.4 2
1911 M 6.6 1
1909 M 5.8 1