United States – Custer County

This page summarizes earthquakes in Custer County (United States). The most recently recorded event was a magnitude M2.5 earthquake near Custer County on 2026-06-20 23:39:38 UTC. All event lists and map markers are limited to the last 30 days.

Earthquakes (last 30 days)
1
Max magnitude (last 30 days)
M2.5
Avg magnitude (last 30 days)
M2.50
Avg depth (last 30 days)
11 km
Seismic activity in 2026

In 2026, Custer County recorded 5 earthquakes within United States. The strongest event reached M2.6.

Located on the North America Plate.

Map (last 30 days)
< 2 2–4 4–5 ≥ 5
Earthquakes in Custer County (last 30 days)
M2.5
Custer County
2026-06-20 · 23:39 UTC · 11 km
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