QuakeIndex

Fault · Alaska

Tintina fault

222 kmlong (138 mi), as mapped
not measuredhow fast it slips
< 15,000 yearssince it last broke the surface
24quakes of M2.5+ within 10 km since 2016

In plain English

Its most recent surface rupture is younger than 15,000 years.

The largest earthquake recorded near it was M 4.8 in 2023 (14 km E of Central, Alaska) — about 500 times the energy of an M3.0, the size people start to feel. It released about 240 tons of TNT.

USGS maps it as 3 sections: Medicine Lake lineament, Preacher fault, unnamed strand.

This week vs. its last ten years

84/100

elevated

1 quake of M1.5+ within 5 km of the trace in the last 7 days — busier than 84% of weeks since 2016. A normal week: 0–0.

Computed from the USGS catalogue · a description of the past, not a forecast · method

The Tintina fault as mapped at the surface (glowing), with the other mapped faults nearby, 24 of the M2.5+ earthquakes within 10 km of it since 2016 (dots), . Traces: USGS Quaternary Fault and Fold Database. Historic epicentres are estimates.

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

  1. M 4.8 14 km E of Central, Alaska
    June 11, 2023 · epicentre 3 km from the trace
  2. M 4.2 44 km WNW of Central, Alaska
    June 14, 2025 · epicentre on 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

  1. M 3.4 44 km WNW of Central, Alaska
    2026-09-13 · 1 km from the trace
  2. M 2.9 50 km ESE of Central, Alaska
    2025-12-04 · 7 km from the trace
  3. M 2.5 28 km ESE of Central, Alaska
    2025-08-03 · 7 km from the trace
  4. M 4.2 44 km WNW of Central, Alaska
    2025-06-14 · 0 km from the trace
  5. M 2.8 1 km NNW of Central, Alaska
    2024-08-02 · 4 km from the trace
  6. M 2.6 43 km SSW of Birch Creek, Alaska
    2024-03-30 · 8 km from the trace

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.