Fault · Alaska
Donnelly Dome fault (Northern Foothills fold and thrust belt)
In plain English
The two sides move 1 to 5 mm a year — 10 to 50 cm (4 to 20 inches) every century.
Its most recent surface rupture is younger than 15,000 years.
The largest earthquake recorded near it was M 6.2 in 1948 (30 km SSW of Fort Greely, Alaska) — about 70,000 times the energy of an M3.0, the size people start to feel. It released about 33 kilotons of TNT.
This week vs. its last ten years
Too quiet to rank: fewer than half a year's worth of weeks with any M1.5+ quake within 5 km, in ten years. A single quake here would read as "unusual", so we do not score it.
Computed from the USGS catalogue · a description of the past, not a forecast · method
Every year since 2016
Earthquakes of M2.5+ with an epicentre within 10 km of the mapped trace. Near is not the same as on: some will have slipped on neighbouring faults.
The big ones recorded near it
- M 6.2 30 km SSW of Fort Greely, Alaska
February 11, 1948 · epicentre 9 km from the trace
Before 1973 from the USGS ComCat historical catalogue (within 25 km; epicentres of old earthquakes are estimates). Since 2016, M4+ within 10 km.
Most recent near it
- M 3.4 13 km SW of Fort Greely, Alaska
2022-03-27 · 7 km from the trace
Neighbouring faults
- Granite Mountain fault (Northern Foothills fold and thrust belt) 1 km away
- Northern Foothills thrust fault (Northern Foothills fold and thrust belt) 7 km away
- Molybdenum Ridge fault (Northern Foothills fold and thrust belt) 19 km away
- McGinnis Glacier fault (Northern Foothills fold and thrust belt) 21 km away
- Denali fault 36 km away
Fault trace, slip rate and age: USGS Quaternary Fault and Fold Database (public domain), simplified for the web. Earthquakes: USGS ComCat. QuakeIndex does not forecast earthquakes; a fault's history describes the past. For early warning use ShakeAlert.