Reviewed by USGSAlaska33y ago
M4.3 earthquake 112 km SE of King Cove, Alaska
Thursday, June 10, 1993, 12:03:32 UTC · 54.279°N, 161.222°W
A magnitude 4.3 earthquake struck 112 km SE of King Cove, Alaska on Thursday, June 10, 1993, 12:03:32 UTC, at a depth of 33.0 km (shallow).
- Magnitude
- 4.3
- Light · mb
- Depth
- 33 km
- Shallow
- Felt reports
- 0
- Did You Feel It?
- Est. shaking
- —
- No ShakeMap
- PAGER alert
- None
- Not issued
- Tsunami
- No flag
- USGS feed
Outlined circle: this earthquake
In context
How big was it, and why here?
Energy released
43 tons of TNT
That is about 1/354 of the Hiroshima bomb. A magnitude 5.0 releases about 11 times more energy.
Tectonic setting
76 km
from the nearest mapped plate boundary, between the North American and Pacific plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: shallow
33 km
Shallow earthquakes (under 70 km) produce the strongest surface shaking for their size, so they are the ones most likely to cause damage near the epicenter.
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 has not published any M2.5+ earthquake within 50 km in the 30 days after this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 212 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.6The 1946 Unimak Island, Alaska EarthquakeApril 1, 1946 · 137 km SW of this epicenter
- 8.21938 Semidi Islands, Alaska EarthquakeNovember 10, 1938 · 219 km NE of this epicenter
- 7.454 km SE of Sand Point, AlaskaMay 31, 1917 · 117 km NE of this epicenter
- 7.190 km SE of King Cove, AlaskaMay 14, 1948 · 35 km N of this epicenter
- 7.071 km SE of King Cove, AlaskaMay 30, 1991 · 41 km NW of this epicenter
- 6.9105 km ESE of Perryville, AlaskaNovember 17, 1938 · 256 km NE of this epicenter
- 6.917 km S of Sand Point, AlaskaMay 13, 1993 · 111 km NE of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 7 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 168 recorded deaths. The most severe:
- 1946M8.6
Unimak Island
1 Apr 1946 · 137 km away · intensity VI
168 deaths$26 million damagetsunami
- 1938M8.2
Alaska
10 Nov 1938 · 226 km away · intensity VI
tsunami
- 1788M8.0
Alaska Peninsula
6 Aug 1788 · 81 km away
tsunami
- 1948M7.5
Alaska Peninsula
14 May 1948 · 28 km away
- 1957M7.5
Aleutian Islands: Fox Islands
22 Mar 1957 · 268 km away · intensity V
- 1820
East Aleutian Islands
1 Mar 1820 · 223 km away
tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.