Reported Earthquakes: Week of Sep 21–Sep 27, 2026
USGS-monitored sensors recorded 1697 reported earthquakes across the United States and its territories for the week of September 21 to September 27, 2026, including 144 at magnitude 2.5 or greater. The largest, a magnitude 4.6 event, was recorded near Rat Islands, Aleutian Islands, Alaska on September 27 (07:48 UTC).
Every reported earthquake is shown, sized and colored by magnitude on a fixed scale (consistent week to week). Alaska and Hawaii are shown at their own scale — see the note below on why.
State & territory breakdown
| State/territory | Reported | Largest magnitude |
|---|---|---|
| California | 654 | M3.7 |
| Alaska | 524 | M4.6 |
| Texas | 145 | M3.6 |
| Hawaii | 108 | M3.2 |
| Puerto Rico | 52 | M3.3 |
| Utah | 49 | M2.7 |
| New Mexico | 37 | M3.4 |
| Nevada | 31 | M4.1 |
| Washington | 30 | M2.4 |
| Montana | 17 | M1.7 |
| Oklahoma | 15 | M2.5 |
| Oregon | 7 | M1.5 |
| Unresolved (CONUS) | 6 | M2.1 |
| Arizona | 5 | M1.9 |
| Wyoming | 4 | M3.1 |
| Missouri | 4 | M2.1 |
| U.S. Virgin Islands | 3 | M3.4 |
| Tennessee | 2 | M2.0 |
| Louisiana | 1 | M2.7 |
| North Carolina | 1 | M2.3 |
| Arkansas | 1 | M2.0 |
| Idaho | 1 | M1.7 |
Source: USGS Earthquake Hazards Program (public data). Magnitude 2.5+ is shown on the map as a readable threshold; the total above includes all magnitudes USGS recorded for the week. Reported activity reflects what instruments recorded — it is not a judgment about risk to any specific place. Full unfiltered catalog: USGS Earthquake Map.
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