The map shows quakes of M1.5 and up from the last 90 days, the 8 biggest on record, and always the very latest quake — even if it was smaller than M1.5. The list below can include smaller ones the map leaves out. Tap any dot for details.
In the last 30 days, 70 earthquakes of M1.5 or bigger were recorded within 100 km of Rancho Cucamonga, the biggest of them M3.5. Over the past year, M3.0+ quakes near Rancho Cucamonga came at 1.1× the usual pace — busier than normal for this area. The biggest quake on record near Rancho Cucamonga — records go back to 1980 — was the M6.7 of Jan 17, 1994, 12:30 UTC: Northridge, California, earthquake.
How we figure this: 23 quakes of M3.0 or bigger within 100 km in the last 12 months (Nov 03, 2025 – Nov 03, 2026), compared with an average of 21.3 a year across the full calendar years 2016–2025, counted the same way. This compares how often quakes happened in two past periods. It is not a forecast, and it does not mean a big earthquake is on its way — nobody can predict earthquakes.
Latest earthquakes near Rancho Cucamonga
| Mag | Location | Local time | Depth | Distance |
|---|---|---|---|---|
| M1.4 | 10 km ESE of Big Bear City, CA | Nov 03, 2026, 12:11 PM | 1 km | 79 km E |
| M1.6 | 4 km NE of Beaumont, CA | Nov 03, 2026, 11:44 AM | 14 km | 62 km ESE |
| M1.8 | 12 km NE of Cabazon, CA | Nov 03, 2026, 11:07 AM | 14 km | 82 km E |
| M0.7 | 0 km S of Lakeland Village, CA | Nov 02, 2026, 11:38 PM | 11 km | 57 km SSE |
| M0.0 | 17 km S of Valle Vista, CA | Nov 02, 2026, 11:28 PM | 5 km | 88 km SE |
| M0.8 | 10 km NW of Morongo Valley, CA | Nov 02, 2026, 10:41 PM | 1 km | 86 km E |
| M0.6 | 7 km W of Calimesa, CA | Nov 02, 2026, 10:39 PM | 12 km | 44 km ESE |
| M2.0 | 7 km W of Calimesa, CA | Nov 02, 2026, 10:33 PM | 14 km | 44 km ESE |
| M0.1 | 9 km WNW of Anza, CA | Nov 02, 2026, 09:38 PM | 12 km | 96 km SE |
| M0.6 | 10 km ESE of Big Bear City, CA | Nov 02, 2026, 08:48 PM | 1 km | 79 km E |
Earthquakes per year near Rancho Cucamonga (M3.0 and up, within 100 km)
M3.0–3.9 M4.0+
Each bar is one year; taller means more quakes (M3.0 and up). The dark red part is the bigger ones (M4.0+), counted inside the number above each bar — not added on top. These may be felt, depending on how far away and how deep they are. 2026 is not a full year yet — it only counts up to today. Source: USGS Earthquake Catalog.
What the last year looked like near Rancho Cucamonga
Every quake of M1.5 or bigger within 100 km over the last year — 643 in total. A quake of exactly M2.0 counts in the M2.0–3.0 group.
The 8 biggest earthquakes on record near Rancho Cucamonga (M4.0 and up, since 1980)
| Mag | Location | Date (UTC) | Distance |
|---|---|---|---|
| M6.7 | Northridge, California, earthquake | Jan 17, 1994, 12:30 UTC | 88 km |
| M6.3 | The 1992 Big Bear, California Earthquake | Jun 28, 1992, 15:05 UTC | 71 km |
| M6.0 | The 1986 North Palm Springs, California Earthquake | Jul 08, 1986, 09:20 UTC | 92 km |
| M5.9 | The 1987 Whittier Narrows, California Earthquake | Oct 01, 1987, 14:42 UTC | 45 km |
| M5.9 | 1km ENE of Granada Hills, California | Jan 17, 1994, 12:31 UTC | 85 km |
| M5.8 | The 1991 Sierra Madre, California Earthquake | Jun 28, 1991, 14:43 UTC | 41 km |
| M5.6 | 7km ENE of Running Springs, CA | Oct 16, 1999, 09:59 UTC | 53 km |
| M5.5 | 11km SSE of Big Bear Lake, California | Jun 28, 1992, 14:43 UTC | 68 km |
Nearby places
Upland, CA (5 km) · Ontario, CA (7 km) · Claremont, CA (12 km) · Anaheim, CA (42 km) · Riverside, CA (25 km) · Santa Ana, CA (47 km)
USGS data fetched Nov 03, 2026, 20:45 UTC · page built Nov 03, 2026, 20:45 UTC. How to read this page: recent-window counts cover M1.5+ events within 100 km; the 10-year layer is based on M3.0+ and the history layer on M4.0+ since 1980. Recording completeness varies by era and region — small quakes from early decades are under-recorded, so “no record” does not prove “never happened”. Depths are relative to sea level and can be slightly negative for shallow events in elevated terrain. Method: data & methodology.