QuakeScout
Magnitude2.6

Reviewed by USGSAlaska2y ago

M2.6 earthquake 57 km WSW of False Pass, Alaska

Monday, June 17, 2024, 14:54:36 UTC · 54.743°N, 164.290°W

A magnitude 2.6 earthquake struck 57 km WSW of False Pass, Alaska on Monday, June 17, 2024, 14:54:36 UTC, at a depth of 131.0 km (intermediate).

Magnitude
2.6
Minor · ml
Depth
131 km
Intermediate
Felt reports
0
Did You Feel It?
Est. shaking
—
No ShakeMap
PAGER alert
None
Not issued
Tsunami
No flag
USGS feed

Outlined circle: this earthquakeDashed circle: 50 km aftershock search area

In context

How big was it, and why here?

Energy released

120 kg of TNT

That is about 1/125,702 of the Hiroshima bomb. A magnitude 5.0 releases about 3,981 times more energy.

Tectonic setting

187 km

from the nearest mapped plate boundary, between the North American and Pacific plates. Earthquakes this far from a boundary happen on faults inside a plate, often less frequently but sometimes strongly.

Depth: intermediate

131 km

Intermediate-depth earthquakes usually break inside a plate that is sinking into the mantle. Shaking spreads over a wide area but is gentler at the epicenter than a shallow quake of the same size.

Did You Feel It?

Where it was felt

No “Did You Feel It?” reports have been published for this event yet. If you felt it, you can add your report on the USGS website.

I felt it — report to USGS ↗

USGS PAGER estimate

Who was exposed to shaking

USGS publishes PAGER impact estimates for significant earthquakes, usually within an hour. No PAGER estimate is available for this event.

After the main event

Aftershocks within 50 km

USGS lists 1 M2.5+ earthquake within 50 km in the following 30 days; the largest was M2.6 on June 18, 2024. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.

1h6h1d3d7d14d30dMainshock M2.6
Time after the mainshock on a logarithmic scale (first hours stretched), magnitude on the vertical axis. M2.5+ events from USGS.
  1. 2.686 km WSW of False Pass, Alaska2y ago · 30 km SW of this epicenter

Regional history

Past M5+ earthquakes within 300 km

USGS lists 427 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:

  1. 8.6The 1946 Unimak Island, Alaska EarthquakeApril 1, 1946 · 168 km SE of this epicenter
  2. 7.881 km E of Nikolski, AlaskaJuly 2, 1965 · 293 km SW of this epicenter
  3. 7.454 km SE of Sand Point, AlaskaMay 31, 1917 · 283 km E of this epicenter
  4. 7.22023 Sand Point, Alaska EarthquakeJuly 16, 2023 · 231 km E of this epicenter
  5. 7.190 km SE of King Cove, AlaskaMay 14, 1948 · 202 km E of this epicenter
  6. 7.139 km S of Akutan, AlaskaMarch 22, 1957 · 144 km SW of this epicenter
  7. 7.071 km SE of King Cove, AlaskaMay 30, 1991 · 174 km E of this epicenter
  8. 7.0203 km SSE of Unalaska, AlaskaAugust 22, 1940 · 298 km S of this epicenter

History · NOAA

Deadliest earthquakes in this area

NOAA’s significant-earthquake database lists 10 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 169 recorded deaths. The most severe:

  1. 1946M8.6

    Unimak Island

    1 Apr 1946 · 168 km away · intensity VI

    168 deaths$26 million damagetsunami

  2. 2023M7.2

    Alaska Peninsula

    16 Jul 2023 · 229 km away · intensity VI

    1 deathtsunami

  3. 1965M6.5

    Aleutian Islands: Fox Islands

    2 Jul 1965 · 286 km away

    Limited damage (under $1M)tsunami

  4. 1788M8.0

    Alaska Peninsula

    6 Aug 1788 · 212 km away

    tsunami

  5. 2020M7.6

    Alaska

    19 Oct 2020 · 300 km away · intensity IX

    tsunami

  6. 1948M7.5

    Alaska Peninsula

    14 May 1948 · 213 km away

NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.

Nearby trackers

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