Earthquakes by city Japan 100 km

Seismic city profile

Earthquake in Koshigaya today

Koshigaya, Japan: 1866 earthquakes of magnitude 4.0+ detected within 100 km.

Population

345,353

Residents in the indexed city record.

Earthquakes

1866

Earthquakes at M4.0+ nearby.

Max magnitude

8.0

Strongest recorded event in the current radius.

Timezone

Asia/Tokyo

Coordinates 35.890, 139.789

Nearby activity pulse

Last 30 days

Last 12 months

Last nearby event: 2026-04-05 23:17 UTC

Strongest nearby event

M 8.0

Fujisawa, Japan

1923-09-01 02:58 UTC

Updated today

Earthquake in Koshigaya today

No earthquake of magnitude M4.0+ has been detected today within 100 km of Koshigaya.

2 M4.0+ event(s) have been observed in the last 30 days around Koshigaya.

The strongest earthquake recorded near Koshigaya reached magnitude 8.0 on 1923-09-01 02:58 UTC, near Fujisawa.

Status today

No earthquake detected today

Strongest today

Was there an earthquake in Koshigaya today?

No earthquake of magnitude M4.0+ has been detected today within 100 km of Koshigaya.

When was the last earthquake near Koshigaya?

The last nearby earthquake was recorded on 2026-04-05 23:17 UTC.

What is the strongest earthquake recorded near Koshigaya?

The strongest earthquake recorded near Koshigaya reached magnitude 8.0 on 1923-09-01 02:58 UTC, near Fujisawa.

Map

Earthquakes within 100 km of Koshigaya

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

Average magnitude

4.6

Average depth

64.8 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
2026-02-19 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
2026-01-30 18:47	M 4.3	Mito Japan	56.9 km
2026-01-29 02:47	M 4.0	Tateyama Japan	26.6 km
2026-01-25 02:46	M 4.3	Oyama Japan	82.6 km
2026-01-17 16:49	M 4.3	Chiba Japan	72.1 km
2026-01-09 11:07	M 4.4	Mobara Japan	28.4 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

Monthly profile

Recent monthly trend

2025-09 1 events

2025-10 4 events

2025-11 5 events

2025-12 2 events

2026-01 5 events

2026-02 5 events

2026-03 1 events

2026-04 2 events

Historic snapshot

Earthquakes history

Strongest years

1923 M 8.0 max · 5 earthquakes 1924 M 7.0 max · 2 earthquakes 1987 M 6.7 max · 27 earthquakes 1931 M 6.5 max · 5 earthquakes 1921 M 6.4 max · 2 earthquakes

Year	Max magnitude	Earthquakes
2026	M 4.9	13
2025	M 4.9	44
2024	M 5.2	72
2023	M 6.1	60
2022	M 5.0	59
2021	M 5.9	41
2020	M 5.3	42
2019	M 5.1	35
2018	M 5.3	40
2017	M 5.4	50
2016	M 5.4	61
2015	M 5.2	54
2014	M 5.5	54
2013	M 5.6	43
2012	M 6.0	68
2011	M 6.2	126
2010	M 5.1	19
2009	M 5.1	20
2008	M 5.2	44
2007	M 5.2	44
2006	M 5.1	39
2005	M 5.9	62
2004	M 5.8	32
2003	M 5.4	27
2002	M 4.9	21
2001	M 5.0	24
2000	M 6.2	29
1999	M 5.4	17
1998	M 5.7	20
1997	M 5.2	24
1996	M 5.6	30
1995	M 5.3	24
1994	M 5.1	19
1993	M 5.2	11
1992	M 5.8	23
1991	M 5.1	18
1990	M 6.3	29
1989	M 6.1	21
1988	M 5.6	26
1987	M 6.7	27
1986	M 5.1	15
1985	M 5.9	34
1984	M 5.4	27
1983	M 5.9	43
1982	M 5.6	28
1981	M 5.2	15
1980	M 6.0	25
1979	M 5.4	13
1978	M 5.7	17
1977	M 5.4	20
1976	M 5.4	15
1975	M 5.3	21
1974	M 5.6	14
1973	M 5.9	24
1971	M 5.5	3
1968	M 6.1	1
1967	M 5.8	2
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
1950	M 6.1	1
1949	M 6.3	2
1938	M 5.5	1
1935	M 5.7	1
1931	M 6.5	5
1930	M 5.7	2
1929	M 6.2	1
1928	M 5.9	2
1927	M 5.6	1
1926	M 5.7	1
1924	M 7.0	2
1923	M 8.0	5
1922	M 6.3	1
1921	M 6.4	2
1909	M 5.8	1