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M1.8 Depth: 43.5 km

M1.8 Earthquake near Fern Forest, Hawaii (United States)

UTC time: 2026-08-21 21:30:57 UTC Local time: —

About this earthquake

On August 21, 2026 at 21:30 UTC, a magnitude M1.8 earthquake occurred near Fern Forest, Hawaii (United States). With a focal depth of about 44 km, this was a shallow earthquake, whose shaking is usually felt more strongly at the surface. Events of this size typically go unnoticed.

The data is provided by USGS and cross-checked across seismological networks. United States: 226 earthquakes were recorded in the past 24 hours, the strongest reaching M3.9.

Details

Magnitude
M1.8
Depth
43.5 km
UTC time
2026-08-21 21:30:57 UTC
Local time
—
Country
United States
State
Hawaii
City
Fern Forest
County
Hawaiʻi County
Village
Fern Forest
Source
usgs
Coordinates
19.48183, -155.13451
Temperature
28.5°C

Map

Depth profile

Depth profile Depth: 43.5 km (Shallow) Surface Shallow Intermediate Deep 0 km 70 km 300 km 700 km 43.5 km
Shallow
43.5 km
43.5 km — deeper than the regional average (15.4 km)
Regional average: 15.4 km
Why depth matters

Shallow quakes release energy near the surface — shaking is felt more strongly and damage potential is higher.

Depth classes per USGS

Volcanoes nearby

  • Kilauea ADVISORY · YELLOW
    Distance: 17 km ·Shield ·Elevation: 1'222 m ·Last eruption: 2026 ·United States
  • Mauna Loa
    Distance: 50 km ·Shield ·Elevation: 4'170 m ·Last eruption: 2022 ·United States
  • Mauna Kea
    Distance: 51 km ·Shield ·Elevation: 4'205 m ·Last eruption: -2460 ·United States
  • Kamaehuakanaloa
    Distance: 64 km ·Shield ·Elevation: -975 m ·Last eruption: 1996 ·United States
  • Hualalai
    Distance: 81 km ·Shield ·Elevation: 2'523 m ·Last eruption: 1801 ·United States
  • Haleakala
    Distance: 180 km ·Shield ·Elevation: 3'053 m ·Last eruption: 1750 ·United States

Historic earthquake map · United States

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Explore recent and long-term earthquake activity in this country. Use filters to narrow down by magnitude, depth, and date range.

Country statistics · United States

Country overview
View earthquake KPIs, strongest and latest events, and averages for this country.

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