Reviewed by USGSRussia49y ago
M4.8 earthquake 100 km ESE of Shikotan, Russia
Monday, April 10, 1978, 10:14:04 UTC · 43.331°N, 147.784°E
A magnitude 4.8 earthquake struck 100 km ESE of Shikotan, Russia on Monday, April 10, 1978, 10:14:04 UTC, at a depth of 43.0 km (shallow). It is the strongest earthquake within 300 km since an M5.3 on April 7, 1978.
- Magnitude
- 4.8
- Light · mb
- Depth
- 43 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
239 tons of TNT
That is about 1/63 of the Hiroshima bomb. A magnitude 5.0 releases about 2 times more energy.
Tectonic setting
37 km
from the nearest mapped plate boundary, between the Okhotsk and Pacific plates. Earthquakes cluster along boundaries like this one, where plates collide, pull apart or slide past each other.
Depth: shallow
43 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 830 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 8.51963 Kuril Islands EarthquakeOctober 13, 1963 · 219 km NE of this epicenter
- 8.31958 Kuril Islands EarthquakeNovember 6, 1958 · 139 km NE of this epicenter
- 8.21969 Hokkaido Toho-oki EarthquakeAugust 11, 1969 · 15 km N of this epicenter
- 7.8217 km ESE of Kuril’sk, RussiaOctober 20, 1963 · 270 km NE of this epicenter
- 7.719 km ESE of Nemuro, JapanJune 17, 1973 · 162 km W of this epicenter
- 7.6134 km SE of Kuril’sk, RussiaMarch 24, 1978 · 133 km NE of this epicenter
- 7.555 km SE of Kuril’sk, RussiaMarch 23, 1978 · 186 km N of this epicenter
- 7.542 km SSW of Shikotan, RussiaSeptember 11, 1935 · 95 km W of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 40 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 74 recorded deaths. The most severe:
- 1843M8.4
Hokkaido: Yezo, Kushiro, Nemuro
25 Apr 1843 · 208 km away
45 deathsModerate damage ($1–5M)tsunami
- 1973M7.7
Hokkaido Island
17 Jun 1973 · 161 km away · intensity VIII
27 deaths$5 million damagetsunami
- 1894M7.9
Off Coast Of Honshu
22 Mar 1894 · 172 km away · intensity IX
1 deathModerate damage ($1–5M)tsunami
- 1938M6.1
E. Hokkaido Island, Japan
28 May 1938 · 283 km away
1 deathLimited damage (under $1M)tsunami
- 1958M8.3
Kuril Islands
6 Nov 1958 · 146 km away · intensity X
Moderate damage ($1–5M)tsunami
- 1969M8.2
Shikotan Island, Kurilskiye
11 Aug 1969 · 31 km away · intensity IX
Moderate damage ($1–5M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.