Live earthquake check
Earthquakes near Ontario today
Updated
No M2.5+ earthquake within 100 km of Ontario in the last 24 hours 5 smaller quakes (largest M1.6) were recorded within 100 km; the latest 3 hours ago.
Was there an earthquake in Ontario just now? This page checks the live USGS catalogue for quakes around Ontario, California, United States and updates every few minutes.
- Last 24 hours
- 0 M2.5+ within 100 km
- Last 7 days
- 0 M2.5+ within 100 km
- Last 30 days
- 9 M2.5+ within 100 km
- Largest in 30 days
- M3.6 79 km WSW, Sep 27, 2026
- Largest in past year
- M4.9 138 km E, Jan 20, 2026
- Past year count
- 197 M2.5+ within 150 km
- Nearest in 30 days
- 16 km M2.7, Oct 8, 2026
Recent earthquakes near Ontario
USGS recorded 9 earthquakes of magnitude 2.5 or more within 100 km of Ontario in the past 30 days, 0 of them in the last 7 days. The most recent was M2.8 69 km ESE of the city at Oct 14, 20:30 local time (11 days ago).
The average depth was about 11 km and 9 of 9 were shallow (under 70 km), which are the ones most likely to be felt at the surface. The busiest day was Oct 5, 2026 with 3 quakes.
USGS also lists 5 smaller quakes (below M2.5) within 100 km in the last 24 hours; these are rarely felt.
| Time (Ontario) | UTC | Magnitude | Distance | Depth | Location |
|---|---|---|---|---|---|
| Oct 14, 20:30 | Oct 15, 03:30 UTC | M2.8 | 69 km ESE | 14 km | 3 km NNW of San Jacinto, CA |
| Oct 11, 01:04 | Oct 11, 08:04 UTC | M2.7 | 75 km ESE | 12 km | 4 km E of San Jacinto, CA |
| Oct 9, 00:44 | Oct 9, 07:44 UTC | M3.2 | 58 km WSW | 12 km | 2 km SW of Signal Hill, CA |
| Oct 8, 01:09 | Oct 8, 08:09 UTC | M2.7 | 16 km ENE | 6 km | 2 km WNW of Fontana, CA |
| Oct 6, 01:40 | Oct 6, 08:40 UTC | M2.6 | 77 km ENE | 4 km | 4 km NNW of Big Bear City, CA |
| Oct 5, 15:06 | Oct 5, 22:06 UTC | M2.5 | 92 km SSW | 11 km | 31 km SW of Dana Point, CA |
| Oct 5, 13:23 | Oct 5, 20:23 UTC | M2.8 | 93 km SSW | 17 km | 32 km SW of Dana Point, CA |
| Oct 5, 13:22 | Oct 5, 20:22 UTC | M3.5 | 92 km SSW | 11 km | 31 km SW of Dana Point, CA |
| Sep 30, 17:01 | Oct 1, 00:01 UTC | M3.1 | 126 km ESE | 5 km | 20 km ESE of Anza, CA |
| Sep 29, 20:00 | Sep 30, 03:00 UTC | M3.8 | 109 km WNW | 10 km | 4 km SE of Piru, CA |
| Sep 27, 08:40 | Sep 27, 15:40 UTC | M3.6 | 79 km WSW | 12 km | 7 km WSW of Hermosa Beach, CA |
M2.5+ within 150 km, past 30 days, newest first. Times in America/Los_Angeles.
Largest earthquakes near Ontario in the past year
The strongest earthquake within 150 km of Ontario in the past 12 months was M4.9 on Jan 20, 2026, 138 km E of the city (20 km NNE of Indio, CA).
With 197 M2.5+ earthquakes in a year (about 16.4 a month), the area around Ontario is very active by global standards. 1 of the ten largest reached M4.5, the level at which damage near the epicentre becomes possible.
| Date | Magnitude | Distance | Depth | Location |
|---|---|---|---|---|
| Jan 20, 2026 | M4.9 | 138 km E | 3 km | 20 km NNE of Indio, CA |
| Jul 13, 2026 | M4.3 | 140 km N | 8 km | 18 km WSW of Johannesburg, CA |
| Jan 21, 2026 | M4.3 | 138 km E | 4 km | 20 km NNE of Indio, CA |
| Mar 27, 2026 | M4.1 | 143 km NE | 1 km | 26 km WNW of Ludlow, CA |
| Jul 12, 2026 | M4.1 | 144 km NW | 13 km | 2 km ESE of Frazier Park, CA |
| Jun 1, 2026 | M4.1 | 138 km N | 8 km | 18 km WSW of Johannesburg, CA |
| Apr 1, 2026 | M3.9 | 144 km NE | 2 km | 26 km WNW of Ludlow, CA |
| Sep 30, 2026 | M3.8 | 109 km WNW | 10 km | 4 km SE of Piru, CA |
| Jan 20, 2026 | M3.8 | 136 km E | 5 km | 18 km N of Indio, CA |
| Jan 20, 2026 | M3.7 | 138 km E | 4 km | 20 km N of Indio, CA |
Was it felt in Ontario?
The largest nearby quake this month, M3.6 at 79 km, was probably too small or too distant to notice in Ontario by a rough rule of thumb (an M3 is typically noticed within a few tens of km, an M5 up to a few hundred km; local ground and building type matter a lot).
USGS "Did You Feel It?" received reports for 11 of these quakes: M2.8 on Oct 15, 2026 (87 reports, max intensity 2.7); M2.7 on Oct 11, 2026 (58 reports, max intensity 2.9); M3.2 on Oct 9, 2026 (1091 reports, max intensity 3.4); M2.7 on Oct 8, 2026 (158 reports, max intensity 3.1).
If you felt shaking, you can report it to USGS; reports refine the intensity map within minutes.
Tsunami warning status
1 earthquake near Ontario in the past year carried the USGS tsunami flag: M4.3 20 km NNE of Indio, CA (Jan 21, 2026). The flag means the quake was large enough and in an oceanic region where tsunami warning centres issue messages; it does not mean a tsunami happened.
Official tsunami warnings come from the NOAA tsunami warning centres (tsunami.gov) and national agencies; follow local authorities if you are on a coast after strong shaking.
Earthquakes around the world today
Worldwide, USGS listed 153 earthquakes of M1+ in the last 24 hours; the largest was M6.5 Bonin Islands, Japan region.
USGS lists every magnitude in the United States but outside it coverage is complete only from about M4–4.5, so smaller local quakes reported by national agencies may be missing. Magnitudes and locations are revised for hours after an event.
Earthquakes near other cities in United States and nearby
Earthquake pages
More live data for Ontario
Data: USGS Earthquake Hazards Program (ComCat), GeoNames (cities, CC BY 4.0).