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214 earthquakes globally today

Earthquakes Near Rancho Cucamonga, California 91730 Today

Live data from USGS · Monitoring ZIP code 91730 Updated just now

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

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Recent Earthquakes Near Rancho Cucamonga, California

49 earthquakes have been recorded within 250 miles of Rancho Cucamonga, California in the past 24 hours. Alertra monitors seismic activity near ZIP code 91730 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 Rancho Cucamonga, this earthquake watch dashboard provides real-time magnitude data, an interactive seismic map, and earthquake history going back 15+ years.

Earthquake Alerts for Rancho Cucamonga, California

Alertra delivers real-time earthquake alerts for Rancho Cucamonga and the surrounding 91730 area. When seismic activity is detected nearby, push notifications are sent within 60 seconds — no manual earthquake watch required.

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📊 Earthquake Watch — Rancho Cucamonga

Live seismic risk assessment · Updated every 60 seconds from USGS

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

Some seismic activity near Rancho Cucamonga. Most too small to feel.

Earthquakes nearby 49
Closest to you M1.1, 2 mi
Strongest in last 24hr M2.6, Rarely felt
Last felt M4.0+ 3 days ago
Tracking Area
Rancho Cucamonga
LIVE EARTHQUAKES
Found 49 in region
Major (6.0+)
Moderate (4.0 - 5.9)
Minor (Below 4.0)
Your Location

🌍 Recent Earthquakes Near Rancho Cucamonga

Past 24 hours within 250 miles · Source: USGS

Showing events within 250 miles · Past 24 hours · Source: USGS
Sort by:
MagnitudeWhat You'd FeelLocationDistanceWhen
M2.6 		Rarely felt 14 km N of Warner Springs, CA 72 mi 6:44 AM Details →
M2.3 		Rarely felt 11 km W of Alberto Oviedo Mota, B.C., MX 185 mi 10:39 PM Details →
M2.1 		Rarely felt 5 km SSE of San Ardo, CA 227 mi 1:29 AM Details →
M2.0 		Not felt 50 km SW of Rachel, Nevada 235 mi 12:53 AM Details →
M1.9 		Not felt 8 km NW of Round Valley, CA 240 mi 6:56 AM Details →
M1.9 		Not felt 9 km ENE of Lebec, CA 87 mi 5:24 AM Details →
M1.8 		Not felt 14 km WSW of Santa Cruz Is. (E end), CA 119 mi 3:23 PM Details →
M1.8 		Not felt 4 km SE of Home Gardens, CA 18 mi 7:31 PM Details →
M1.5 		Not felt 1 km SSE of Ocotillo, CA 132 mi 5:49 PM Details →
M1.5 		Not felt 12 km ESE of Enterprise, Nevada 190 mi 7:09 PM Details →
M1.5 		Not felt 7 km S of Ojai, CA 97 mi 10:56 AM Details →
M1.5 		Not felt 20 km NW of Ojai, CA 108 mi 8:44 AM Details →
M1.5 		Not felt 22 km SW of West Bishop, CA 223 mi 2:36 PM Details →
M1.3 		Not felt 14 km N of Warner Springs, CA 72 mi 11:06 AM Details →
M1.3 		Not felt 3 km WNW of La Mirada, CA 29 mi 3:01 AM Details →
M1.1 		Not felt 11 km NW of Parkfield, CA 210 mi 11:46 PM Details →
M1.1 		Not felt 19 km ESE of Little Lake, CA 122 mi 1:01 PM Details →
M1.1 		Not felt 12 km E of Borrego Springs, CA 97 mi 3:19 AM Details →
M1.1 		Not felt 15 km N of Warner Springs, CA 72 mi 6:45 AM Details →
M1.1 		Not felt 3 km NE of Ontario, CA 2 mi 8:36 AM Details →
M1.0 		Not felt 4 km SW of Redlands, CA 22 mi 8:15 AM Details →
M1.0 		Not felt 6 km W of Devore, CA 10 mi 3:02 PM Details →
M1.0 		Not felt 25 km NNW of Tehachapi, CA 101 mi 12:31 PM Details →
M1.0 		Not felt 4 km SW of Anza, CA 63 mi 2:26 AM Details →
M0.9 		Not felt 8 km N of Coso Junction, CA 141 mi 7:45 PM Details →
M0.9 		Not felt 11 km W of Mojave, CA 77 mi 4:57 PM Details →
M0.9 		Not felt 10 km ENE of Coso Junction, CA 138 mi 3:19 PM Details →
M0.9 		Not felt 5 km WSW of Lytle Creek, CA 11 mi 2:45 AM Details →
M0.9 		Not felt 7 km S of Borrego Springs, CA 93 mi 4:26 PM Details →
M0.8 		Not felt 4 km WSW of Anza, CA 63 mi 7:57 PM Details →
M0.7 		Not felt 9 km WNW of Anza, CA 59 mi 5:22 PM Details →
M0.7 		Not felt 2 km SE of El Monte, CA 25 mi 9:28 AM Details →
M0.7 		Not felt 5 km SE of Loma Linda, CA 21 mi 7:12 AM Details →
M0.7 		Not felt 4 km SW of Anza, CA 63 mi 9:33 PM Details →
M0.6 		Not felt 4 km SW of Anza, CA 64 mi 4:25 AM Details →
M0.6 		Not felt 10 km WNW of Bradley, CA 226 mi 1:34 AM Details →
M0.6 		Not felt 15 km N of Warner Springs, CA 72 mi 3:46 PM Details →
M0.6 		Not felt 21 km WSW of Coalinga, CA 217 mi 7:11 PM Details →
M0.5 		Not felt 19 km NNW of Borrego Springs, CA 81 mi 8:17 PM Details →
M0.5 		Not felt 4 km WSW of Anza, CA 63 mi 4:07 PM Details →
M0.5 		Not felt 5 km SSW of Banning, CA 42 mi 4:19 AM Details →
M0.5 		Not felt 7 km SSE of Lake Henshaw, CA 80 mi 10:45 AM Details →
M0.4 		Not felt 15 km N of Warner Springs, CA 72 mi 5:56 PM Details →
M0.4 		Not felt 5 km WSW of Lytle Creek, CA 10 mi 2:46 AM Details →
M0.3 		Not felt 3 km WSW of Anza, CA 63 mi 1:27 AM Details →
M0.2 		Not felt 3 km WSW of Anza, CA 64 mi 1:32 PM Details →
M0.1 		Not felt 3 km WSW of Anza, CA 64 mi 8:23 AM Details →
M-0.0 		Not felt 15 km N of Warner Springs, CA 72 mi 11:53 AM Details →
M-0.1 		Not felt 15 km N of Warner Springs, CA 72 mi 9:12 AM Details →

📈 Earthquake History — Rancho Cucamonga

Since 2010 · M2.5+ · 250 mi radius

Rancho Cucamonga has recorded 14,331 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 1208 notable seismic events per year.

M2.5+ in Past 7 Days

Sat
0
—
Sun
0
—
Mon
2
MAX M3.2
Tue
7
MAX M4.9
Wed
2
MAX M3.1
Thu
0
—
Fri
1
MAX M2.6
Since 2010 · M2.5+ · 250 mi

Yearly Activity · 14331 events

Past Week
View:
M2.5–4 (bars)
M4+ (line, right axis)
Yearly Earthquake Activity by Magnitude01k2k3k4k050100150'10'13'16'19'22'252010: 2,184 (M2.5–4), 86 (M4+)2011: 791 (M2.5–4), 32 (M4+)2012: 747 (M2.5–4), 36 (M4+)2013: 528 (M2.5–4), 18 (M4+)2014: 558 (M2.5–4), 15 (M4+)2015: 414 (M2.5–4), 12 (M4+)2016: 521 (M2.5–4), 14 (M4+)2017: 452 (M2.5–4), 6 (M4+)2018: 435 (M2.5–4), 13 (M4+)2019: 3,122 (M2.5–4), 134 (M4+)2020: 919 (M2.5–4), 36 (M4+)2021: 633 (M2.5–4), 19 (M4+)2022: 444 (M2.5–4), 17 (M4+)2023: 480 (M2.5–4), 16 (M4+)2024: 645 (M2.5–4), 36 (M4+)2025: 493 (M2.5–4), 12 (M4+)2026: 448 (M2.5–4), 15 (M4+)
Event count (bars)
Seismic energy index (line)
Yearly Seismic Energy Release01k2k3k4k020.0B40.0B60.0B'10'13'16'19'22'252010: 2,270 events, Energy: 904.4M2011: 823 events, Energy: 149.1M2012: 783 events, Energy: 3.3B2013: 546 events, Energy: 94.0M2014: 573 events, Energy: 114.8M2015: 426 events, Energy: 79.9M2016: 535 events, Energy: 147.0M2017: 458 events, Energy: 31.3M2018: 448 events, Energy: 159.3M2019: 3,256 events, Energy: 49.8B2020: 955 events, Energy: 1.1B2021: 652 events, Energy: 173.0M2022: 461 events, Energy: 2.1B2023: 496 events, Energy: 121.3M2024: 681 events, Energy: 274.5M2025: 505 events, Energy: 113.0M2026: 463 events, Energy: 106.3M
Largest Recorded
M7.1
Ridgecrest Earthquake Sequence
Jul 6, 2019
Avg Noticeable / Year
58.3
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 — Rancho Cucamonga, California

What Rancho Cucamonga 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 Rancho Cucamonga with live tracking

🔔 Get earthquake alerts for Rancho Cucamonga
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 Rancho Cucamonga. Our threat scores, historical trend charts, and proximity alerts are all derived from this data — updated every 60 seconds.

Earthquake FAQ — Rancho Cucamonga, California

Was there an earthquake in Rancho Cucamonga today?

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

Did an earthquake just happen near Rancho Cucamonga?

Check the live earthquake table above for the most recent seismic events near 91730. Alertra detects earthquakes right now as they happen and can send you instant earthquake alerts for Rancho Cucamonga.

What is the earthquake history for Rancho Cucamonga, California?

Alertra tracks USGS seismic records going back 15+ years for the Rancho Cucamonga area. View the historical trends chart above to see yearly earthquake frequency and the largest recorded event near 91730.

How do I get earthquake alerts for Rancho Cucamonga?

Download the Alertra app to receive push notifications within 60 seconds of any earthquake detected near 91730. Alertra monitors USGS seismic data 24/7 — no manual earthquake watch required.

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