Live record · within 100 km (62 mi) · M2.5+
Earthquakes near Diamond Bar
In the last 30 days there were 10 earthquakes of magnitude 2.5 or larger within 100 km (62 mi) of Diamond Bar, California, and 0 in the last 24 hours. The strongest was a magnitude 3.8, 97 km (60 mi) WNW of Diamond Bar, on 2026-09-30.
Earthquakes M2.5+ within 100 km
- Last 24 hours0
- Last 7 days0
- Last 30 days10
- Last year69
- Last 5 years330
M1+ in the last 7 days: 39. Methodology
01 — History
Earthquakes per month near Diamond Bar
149 earthquakes of magnitude 2.5 or larger within 100 km of Diamond Bar in the last 24 months. The busiest month was Sep 2026, with 12.
02 — Recent
Recent earthquakes near Diamond Bar
| Magnitude | Location | Distance | Depth | Time |
|---|---|---|---|---|
| 2.8 | 3 km NNW of San Jacinto, CA | 82 km / 51 mi | depth 14 km | |
| 2.7 | 4 km E of San Jacinto, CA | 87 km / 54 mi | depth 12 km | |
| 3.2 | 2 km SW of Signal Hill, CA | 44 km / 27 mi | depth 12 km | |
| 2.7 | 2 km WNW of Fontana, CA | 31 km / 19 mi | depth 6 km | |
| 2.6 | 4 km NNW of Big Bear City, CA | 92 km / 57 mi | depth 4 km | |
| 2.5 | 31 km SW of Dana Point, CA | 85 km / 53 mi | depth 11 km | |
| 2.8 | 32 km SW of Dana Point, CA | 86 km / 53 mi | depth 17 km | |
| 3.5 | 31 km SW of Dana Point, CA | 85 km / 53 mi | depth 11 km | |
| 3.8 | 4 km SE of Piru, CA | 97 km / 60 mi | depth 10 km | |
| 3.6 | 7 km WSW of Hermosa Beach, CA | 64 km / 40 mi | depth 12 km |
03 — Questions
Earthquakes in Diamond Bar, answered
Was there an earthquake in Diamond Bar today?
No earthquake of magnitude 2.5 or larger was recorded within 100 km of Diamond Bar in the last 24 hours. Smaller ones can still occur. The home page lists them when you choose “All” magnitudes.
Are earthquakes common near Diamond Bar?
Over the last five years there were 330 earthquakes of magnitude 2.5 or larger within 100 km of Diamond Bar, an average of 66 a year. 69 occurred in the last 12 months. That is close to the five-year average.
What was the largest earthquake near Diamond Bar in five years?
A magnitude 4.7 on Sep 12, 2024, 14:28 UTC, 92 km (57 mi) W of Diamond Bar, 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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