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216 earthquakes globally today

Earthquakes Near Ontario, California 91761 Today

Live data from USGS · Monitoring ZIP code 91761 Updated just now

39 tiny quakes nearby. Too small to feel. Completely normal background activity.

📱 Get earthquake alerts — download the app for real-time notifications

Recent Earthquakes Near Ontario, California

39 earthquakes have been recorded within 250 miles of Ontario, California in the past 24 hours. Alertra monitors seismic activity near ZIP code 91761 using live data from the U.S. Geological Survey (USGS), updated every 60 seconds. Whether you felt shaking or are checking if an earthquake just happened near Ontario, this earthquake watch dashboard provides real-time magnitude data, an interactive seismic map, and earthquake history going back 15+ years.

Earthquake Alerts for Ontario, California

Alertra delivers real-time earthquake alerts for Ontario and the surrounding 91761 area. When seismic activity is detected nearby, push notifications are sent within 60 seconds — no manual earthquake watch required.

Coming soon! We're working on bringing monitoring to Alertra.

📊 Earthquake Watch — Ontario

Live seismic risk assessment · Updated every 60 seconds from USGS

Current Threat Level
All Quiet
LowModerateHigh
Threat score: 12 / 100

Some seismic activity near Ontario. Most too small to feel.

Earthquakes nearby 39
Closest to you M0.9, 19 mi
Strongest in last 24hr M2.5, Rarely felt
Last felt M4.0+ 22 days ago
Tracking Area
Ontario
LIVE EARTHQUAKES
Found 39 in region
Major (6.0+)
Moderate (4.0 - 5.9)
Minor (Below 4.0)
Your Location

🌍 Recent Earthquakes Near Ontario

Past 24 hours within 250 miles · Source: USGS

Showing events within 250 miles · Past 24 hours · Source: USGS
Sort by:
MagnitudeWhat You'd FeelLocationDistanceWhen
M2.5 		Rarely felt 25 km WNW of Inyokern, CA 120 mi 5:52 AM Details →
M2.3 		Rarely felt 17 km NNW of Indian Springs, Nevada 212 mi 4:03 PM Details →
M2.1 		Rarely felt 7 km N of Beaumont, CA 35 mi 3:50 PM Details →
M1.9 		Not felt 18 km NNW of Indian Springs, Nevada 213 mi 4:16 AM Details →
M1.9 		Not felt 31 km N of Searles Valley, CA 139 mi 6:15 AM Details →
M1.8 		Not felt 17 km NNW of Indian Springs, Nevada 212 mi 1:16 PM Details →
M1.7 		Not felt 5 km ENE of Ocotillo Wells, CA 106 mi 2:18 AM Details →
M1.6 		Not felt 14 km ESE of Pine Valley, CA 111 mi 10:08 AM Details →
M1.6 		Not felt 16 km WNW of Progreso, B.C., MX 144 mi 2:23 PM Details →
M1.5 		Not felt 7 km NE of Moreno Valley, CA 24 mi 9:19 AM Details →
M1.5 		Not felt 4 km ENE of Ocotillo Wells, CA 105 mi 6:31 PM Details →
M1.4 		Not felt 13 km SSW of Searles Valley, CA 113 mi 9:20 PM Details →
M1.4 		Not felt 5 km SSE of Malibu Beach, CA 62 mi 9:03 AM Details →
M1.4 		Not felt 23 km WSW of Westmorland, CA 125 mi 4:45 PM Details →
M1.4 		Not felt 6 km SW of Calimesa, CA 29 mi 3:31 PM Details →
M1.2 		Not felt 5 km NE of Bradbury, CA 22 mi 6:45 PM Details →
M1.2 		Not felt 18 km SSW of Searles Valley, CA 109 mi 7:58 PM Details →
M1.1 		Not felt 9 km ENE of Coso Junction, CA 143 mi 1:20 AM Details →
M1.1 		Not felt 5 km NNE of Westmorland, CA 133 mi 9:50 PM Details →
M1.1 		Not felt 13 km S of Olancha, CA 149 mi 9:01 PM Details →
M1.1 		Not felt 21 km SSW of Frazier Park, CA 92 mi 4:29 AM Details →
M1.1 		Not felt 16 km WSW of Johannesburg, CA 90 mi 3:44 AM Details →
M1.1 		Not felt 21 km N of Searles Valley, CA 133 mi 11:23 PM Details →
M1.0 		Not felt 5 km N of Santa Ana, CA 24 mi 1:57 PM Details →
M1.0 		Not felt 17 km ESE of Little Lake, CA 129 mi 6:42 PM Details →
M0.9 		Not felt 18 km WSW of Johannesburg, CA 88 mi 8:49 AM Details →
M0.9 		Not felt 1 km SW of Loma Linda, CA 19 mi 5:26 AM Details →
M0.9 		Not felt 4 km SSE of Calimesa, CA 33 mi 8:05 PM Details →
M0.9 		Not felt 18 km NNE of Indio, CA 82 mi 5:19 AM Details →
M0.9 		Not felt 1 km SSW of View Park-Windsor Hills, CA 44 mi 9:05 AM Details →
M0.8 		Not felt 15 km E of Coso Junction, CA 139 mi 12:53 AM Details →
M0.8 		Not felt 4 km WNW of Borrego Springs, CA 86 mi 6:25 PM Details →
M0.7 		Not felt 19 km WNW of Searles Valley, CA 122 mi 8:36 PM Details →
M0.6 		Not felt 15 km NE of Little Lake, CA 138 mi 1:29 AM Details →
M0.6 		Not felt 9 km S of Valle Vista, CA 47 mi 2:35 AM Details →
M0.6 		Not felt 5 km SW of Warner Springs, CA 76 mi 1:15 PM Details →
M0.5 		Not felt 10 km NNW of Anza, CA 57 mi 5:36 PM Details →
M0.5 		Not felt 10 km SSE of Hemet, CA 45 mi 6:18 PM Details →
M0.2 		Not felt 15 km NE of Little Lake, CA 138 mi 11:56 AM Details →

📈 Earthquake History — Ontario

Since 2010 · M2.5+ · 250 mi radius

Ontario has recorded 14,227 earthquakes of magnitude 2.5 or greater within 250 miles since 2010. The largest was a M7.1 on Jul 6, 2019, located Ridgecrest Earthquake Sequence. On average, the area experiences approximately 1227 notable seismic events per year.

M2.5+ in Past 7 Days

Wed
1
MAX M2.8
Thu
1
MAX M3.4
Fri
1
MAX M3.0
Sat
2
MAX M3.2
Sun
1
MAX M3.1
Mon
0
—
Tue
1
MAX M2.5
Since 2010 · M2.5+ · 250 mi

Yearly Activity · 14227 events

Past Week
View:
M2.5–4 (bars)
M4+ (line, right axis)
Yearly Earthquake Activity by Magnitude01k2k3k4k050100150'10'13'16'19'22'252010: 2,346 (M2.5–4), 91 (M4+)2011: 781 (M2.5–4), 31 (M4+)2012: 737 (M2.5–4), 36 (M4+)2013: 518 (M2.5–4), 18 (M4+)2014: 556 (M2.5–4), 15 (M4+)2015: 407 (M2.5–4), 12 (M4+)2016: 514 (M2.5–4), 14 (M4+)2017: 415 (M2.5–4), 6 (M4+)2018: 430 (M2.5–4), 13 (M4+)2019: 3,110 (M2.5–4), 134 (M4+)2020: 908 (M2.5–4), 35 (M4+)2021: 616 (M2.5–4), 19 (M4+)2022: 436 (M2.5–4), 17 (M4+)2023: 474 (M2.5–4), 16 (M4+)2024: 639 (M2.5–4), 36 (M4+)2025: 486 (M2.5–4), 12 (M4+)2026: 336 (M2.5–4), 13 (M4+)
Event count (bars)
Seismic energy index (line)
Yearly Seismic Energy Release01k2k3k4k020.0B40.0B60.0B'10'13'16'19'22'252010: 2,437 events, Energy: 935.9M2011: 812 events, Energy: 146.9M2012: 773 events, Energy: 3.3B2013: 536 events, Energy: 93.4M2014: 571 events, Energy: 114.8M2015: 419 events, Energy: 79.8M2016: 528 events, Energy: 146.8M2017: 421 events, Energy: 28.7M2018: 443 events, Energy: 159.2M2019: 3,244 events, Energy: 49.8B2020: 943 events, Energy: 1.1B2021: 635 events, Energy: 172.5M2022: 453 events, Energy: 2.1B2023: 490 events, Energy: 121.2M2024: 675 events, Energy: 274.4M2025: 498 events, Energy: 112.9M2026: 349 events, Energy: 79.1M
Largest Recorded
M7.1
Ridgecrest Earthquake Sequence
Jul 6, 2019
Avg Noticeable / Year
57.6
Estimated felt (MMI ≥ II)

Strongest Recorded Earthquakes

M7.1 Jul 6, 2019
Ridgecrest Earthquake Sequence
M6.5 May 15, 2020
Monte Cristo Range, NV Earthquake
M6.4 Jul 4, 2019
Ridgecrest Earthquake Sequence
M6.3 Dec 14, 2012
279 km SSW of Avalon, California
M6.2 Nov 22, 2022
28 km SW of Las Brisas, Mexico
M6.0 Jul 8, 2021
Antelope Valley, CA
📊 Looking for detailed historical data?

🛡️ Earthquake Safety — Ontario, California

What Ontario residents should know before, during, and after an earthquake

🏠 Step 1

Before: Secure Your Space

Bolt heavy furniture to walls. Keep an emergency kit within arm's reach of where you sleep. Know your exits.

🛡️ Step 2

During: Drop, Cover, Hold On

Drop to your hands and knees. Take cover under sturdy furniture. Hold on until the shaking stops. Stay away from windows.

🚪 Step 3

After: Check and Evacuate

Check for injuries and damage. If you smell gas, leave immediately and call 911. Expect aftershocks.

72-Hour Emergency Kit

✓ 1 gallon of water per person per day
✓ Non-perishable food (3-day supply)
✓ Battery-powered NOAA weather radio
✓ Flashlight and extra batteries
✓ First aid kit
✓ Whistle to signal for help
✓ N95 dust masks
✓ Plastic sheeting and duct tape
✓ Wrench or pliers to turn off utilities
✓ Manual can opener

Notable US Seismic History

1994 Northridge, CA
M6.7
57 fatalities, $50B in damage. One of the costliest US natural disasters.
2011 Virginia
M5.8
Felt across 22 states. The most widely felt earthquake in US history.
2018 Anchorage, AK
M7.1
Major infrastructure damage across south-central Alaska.

📍 Nearby Earthquake Monitoring

Cities near Ontario with live tracking

🔔 Get earthquake alerts for Ontario
Alertra monitors live data 24/7 and sends push notifications the moment a earthquake is detected near you.

🏢 About Alertra

Alertra is an earthquake monitoring platform built by a team of engineers in Arizona focused on natural disaster safety technology. We provide real-time earthquake alerts and risk assessments to help communities prepare before disaster strikes.

Alertra ingests real-time seismic data from the U.S. Geological Survey (USGS) and combines it with over 15 years of legacy earthquake records to build localized risk models for communities like Ontario. Our threat scores, historical trend charts, and proximity alerts are all derived from this data — updated every 60 seconds.

Earthquake FAQ — Ontario, California

Was there an earthquake in Ontario today?

39 tiny quakes nearby. Too small to feel. Completely normal background activity. This page shows all earthquakes detected within 250 miles of Ontario in the past 24 hours, updated every 60 seconds from USGS.

Did an earthquake just happen near Ontario?

Check the live earthquake table above for the most recent seismic events near 91761. Alertra detects earthquakes right now as they happen and can send you instant earthquake alerts for Ontario.

What is the earthquake history for Ontario, California?

Alertra tracks USGS seismic records going back 15+ years for the Ontario area. View the historical trends chart above to see yearly earthquake frequency and the largest recorded event near 91761.

How do I get earthquake alerts for Ontario?

Download the Alertra app to receive push notifications within 60 seconds of any earthquake detected near 91761. Alertra monitors USGS seismic data 24/7 — no manual earthquake watch required.

App Coming Soon!

We're putting the final touches on the Alertra app. Enter your email below to join the waitlist and get early access.