Live record · within 100 km (62 mi) · M2.5+
Earthquakes near Rancho Cucamonga
In the last 30 days there were 9 earthquakes of magnitude 2.5 or larger within 100 km (62 mi) of Rancho Cucamonga, California, and 0 in the last 24 hours. The strongest was a magnitude 3.6, 86 km (53 mi) WSW of Rancho Cucamonga, on 2026-09-27.
Earthquakes M2.5+ within 100 km
- Last 24 hours0
- Last 7 days0
- Last 30 days9
- Last year64
- Last 5 years314
M1+ in the last 7 days: 40. Methodology
01 — History
Earthquakes per month near Rancho Cucamonga
142 earthquakes of magnitude 2.5 or larger within 100 km of Rancho Cucamonga in the last 24 months. The busiest month was Aug 2025, with 12.
02 — Recent
Recent earthquakes near Rancho Cucamonga
| Magnitude | Location | Distance | Depth | Time |
|---|---|---|---|---|
| 2.8 | 3 km NNW of San Jacinto, CA | 67 km / 42 mi | depth 14 km | |
| 2.7 | 4 km E of San Jacinto, CA | 72 km / 45 mi | depth 12 km | |
| 3.2 | 2 km SW of Signal Hill, CA | 65 km / 40 mi | depth 12 km | |
| 2.7 | 2 km WNW of Fontana, CA | 10 km / 6 mi | depth 6 km | |
| 2.6 | 4 km NNW of Big Bear City, CA | 70 km / 44 mi | depth 4 km | |
| 2.5 | 31 km SW of Dana Point, CA | 98 km / 61 mi | depth 11 km | |
| 2.8 | 32 km SW of Dana Point, CA | 99 km / 61 mi | depth 17 km | |
| 3.5 | 31 km SW of Dana Point, CA | 98 km / 61 mi | depth 11 km | |
| 3.6 | 7 km WSW of Hermosa Beach, CA | 86 km / 53 mi | depth 12 km |
03 — Questions
Earthquakes in Rancho Cucamonga, answered
Was there an earthquake in Rancho Cucamonga today?
No earthquake of magnitude 2.5 or larger was recorded within 100 km of Rancho Cucamonga in the last 24 hours. Smaller ones can still occur. The home page lists them when you choose “All” magnitudes.
Are earthquakes common near Rancho Cucamonga?
Over the last five years there were 314 earthquakes of magnitude 2.5 or larger within 100 km of Rancho Cucamonga, an average of 63 a year. 64 occurred in the last 12 months. That is close to the five-year average.
What was the largest earthquake near Rancho Cucamonga in five years?
A magnitude 4.4 on Aug 12, 2024, 19:20 UTC, 54 km (34 mi) W of Rancho Cucamonga, at a depth of 11 km. See this earthquake
Counts describe past activity within 100 km of the city centre. They are not a forecast or a risk assessment. Data updated . Source: USGS.
05 — Embed
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