Earthquakes by city Japan 100 km

Seismic city profile

Earthquake in Koga today

Koga, Japan: 1636 earthquakes of magnitude 4.0+ detected within 100 km.

Population

139,344

Residents in the indexed city record.

Earthquakes

1636

Earthquakes at M4.0+ nearby.

Max magnitude

7.0

Strongest recorded event in the current radius.

Timezone

Asia/Tokyo

Coordinates 36.183, 139.717

Nearby activity pulse

Last 30 days

Last 12 months

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

Strongest nearby event

M 7.0

Kawagoe, Japan

1924-01-14 20:50 UTC

Updated today

Earthquake in Koga today

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

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

The strongest earthquake recorded near Koga reached magnitude 7.0 on 1924-01-14 20:50 UTC, near Kawagoe.

Status today

No earthquake detected today

Strongest today

Was there an earthquake in Koga today?

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

When was the last earthquake near Koga?

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

What is the strongest earthquake recorded near Koga?

The strongest earthquake recorded near Koga reached magnitude 7.0 on 1924-01-14 20:50 UTC, near Kawagoe.

Map

Earthquakes within 100 km of Koga

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

Average magnitude

4.6

Average depth

67.7 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
2026-01-23 21:20	M 4.0	Hitachiomiya Japan	56.6 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
2025-11-13 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 4 events

2025-12 2 events

2026-01 4 events

2026-02 4 events

2026-03 1 events

2026-04 2 events

Historic snapshot

Earthquakes history

Strongest years

1924 M 7.0 max · 3 earthquakes 1931 M 6.5 max · 3 earthquakes 1921 M 6.4 max · 2 earthquakes 1922 M 6.3 max · 1 earthquakes 1949 M 6.3 max · 2 earthquakes

Year	Max magnitude	Earthquakes
2026	M 4.9	11
2025	M 4.9	44
2024	M 5.2	52
2023	M 4.9	44
2022	M 5.3	48
2021	M 5.9	42
2020	M 5.3	36
2019	M 5.1	34
2018	M 5.0	30
2017	M 5.1	44
2016	M 5.9	58
2015	M 5.2	51
2014	M 5.5	58
2013	M 5.8	47
2012	M 5.8	59
2011	M 6.2	145
2010	M 5.1	21
2009	M 5.1	16
2008	M 5.2	38
2007	M 5.0	29
2006	M 5.1	31
2005	M 5.9	49
2004	M 5.8	30
2003	M 5.3	22
2002	M 4.9	13
2001	M 5.0	24
2000	M 6.2	23
1999	M 5.4	15
1998	M 5.4	18
1997	M 5.2	20
1996	M 5.5	21
1995	M 5.3	25
1994	M 5.1	15
1993	M 5.2	6
1992	M 5.3	20
1991	M 5.1	20
1990	M 6.3	21
1989	M 6.1	18
1988	M 5.6	18
1987	M 5.1	24
1986	M 5.1	16
1985	M 5.9	30
1984	M 5.4	25
1983	M 5.9	31
1982	M 5.6	23
1981	M 5.2	13
1980	M 6.0	20
1979	M 5.4	12
1978	M 5.7	18
1977	M 5.4	14
1976	M 5.4	15
1975	M 5.3	22
1974	M 5.6	9
1973	M 5.9	19
1971	M 5.5	2
1969	M 5.7	2
1968	M 6.1	1
1967	M 5.5	1
1965	M 5.7	3
1956	M 6.3	2
1952	M 6.0	1
1951	M 5.9	1
1949	M 6.3	2
1938	M 5.5	1
1931	M 6.5	3
1929	M 6.2	1
1928	M 5.6	1
1927	M 5.6	1
1924	M 7.0	3
1922	M 6.3	1
1921	M 6.4	2
1909	M 5.8	1