Earthquakes by city United States 100 km

Seismic city profile

Earthquake in Ontario today

Ontario, United States: 248 earthquakes of magnitude 4.0+ detected within 100 km.

Population

171,214

Residents in the indexed city record.

Earthquakes

248

Earthquakes at M4.0+ nearby.

Max magnitude

6.7

Strongest recorded event in the current radius.

Timezone

America/Los_Angeles

Coordinates 34.063, -117.651

Nearby activity pulse

Last 30 days

Last 12 months

Last nearby event: 2025-07-31 16:32 UTC

Strongest nearby event

M 6.7

Menifee, United States

1918-04-21 22:32 UTC

Updated today

Earthquake in Ontario today

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

No M4.0+ event has been observed in the last 30 days around Ontario.

The strongest earthquake recorded near Ontario reached magnitude 6.7 on 1918-04-21 22:32 UTC, near Menifee.

Status today

No earthquake detected today

Strongest today

Was there an earthquake in Ontario today?

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

When was the last earthquake near Ontario?

The last nearby earthquake was recorded on 2025-07-31 16:32 UTC.

What is the strongest earthquake recorded near Ontario?

The strongest earthquake recorded near Ontario reached magnitude 6.7 on 1918-04-21 22:32 UTC, near Menifee.

Map

Earthquakes within 100 km of Ontario

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

Average magnitude

4.5

Average depth

7.9 km

Timeline

Recent seismic activity

Latest 25 events shown

UTC	Magnitude	Region	Depth
2025-07-31 16:32	M 4.4	Riverside United States	5.3 km
2024-08-12 19:20	M 4.4	Los Angeles United States	11.0 km
2024-05-01 20:49	M 4.1	Santa Ana United States	4.6 km
2024-01-25 03:43	M 4.2	Riverside United States	15.8 km
2024-01-05 18:55	M 4.2	Fontana United States	9.1 km
2024-01-01 16:27	M 4.1	Rancho Palos Verdes United States	11.4 km
2023-01-25 10:00	M 4.2	Santa Monica United States	14.7 km
2021-09-18 02:58	M 4.3	Long Beach United States	11.9 km
2021-04-05 11:44	M 4.0	Los Angeles United States	19.3 km
2020-09-19 06:38	M 4.5	Los Angeles United States	16.9 km
2020-07-30 11:29	M 4.2	Glendale United States	8.9 km
2018-08-29 02:33	M 4.4	Rancho Cucamonga United States	5.5 km
2018-05-08 11:49	M 4.5	Yucaipa United States	12.9 km
2016-01-06 14:42	M 4.4	Hemet United States	16.7 km
2015-12-30 01:48	M 4.4	San Bernardino United States	7.0 km
2015-09-16 16:10	M 4.0	Yucaipa United States	9.6 km
2014-07-05 16:59	M 4.6	Highland United States	7.3 km
2014-06-02 02:36	M 4.2	Los Angeles United States	4.3 km
2014-03-29 21:32	M 4.1	Anaheim United States	9.3 km
2014-03-29 04:09	M 5.1	Anaheim United States	5.1 km
2014-03-17 13:25	M 4.4	Los Angeles United States	9.2 km
2014-01-15 09:35	M 4.4	Riverside United States	2.9 km
2013-05-15 20:00	M 4.1	Long Beach United States	1.1 km
2012-08-29 20:31	M 4.1	Anaheim United States	9.1 km
2012-08-08 16:33	M 4.1	Anaheim United States	10.2 km

Monthly profile

Recent monthly trend

No monthly activity to display yet.

Historic snapshot

Earthquakes history

No historic yearly data to display yet.

Year	Max magnitude	Earthquakes