M6.0 earthquake 97 km SE of Shikotan, Russia

Tuesday, January 30, 1968, 01:48:27 UTC · 43.262°N, 147.674°E

A magnitude 6.0 earthquake struck 97 km SE of Shikotan, Russia on Tuesday, January 30, 1968, 01:48:27 UTC, at a depth of 10.3 km (shallow). It is the strongest earthquake within 300 km since an M6.1 on January 29, 1968.

Magnitude: 6.0; Moderate · mw
Depth: 10 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 earthquakeDashed circle: 75 km aftershock search area

In context

How big was it, and why here?

Energy released

13 kilotons of TNT

That is about the energy of the Hiroshima bomb. It released about 28 times the energy of a magnitude 5.0.

Tectonic setting

36 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

10 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 75 km

USGS lists 5 M2.5+ earthquakes within 75 km in the following 30 days; the largest was M6.5 on February 4, 1968. Most nearby activity right after a large earthquake is aftershocks, which usually become less frequent over days and weeks.

Time after the mainshock on a logarithmic scale (first hours stretched), magnitude on the vertical axis. M2.5+ events from USGS.

Regional history

Past M5+ earthquakes within 300 km

USGS lists 286 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:

History · NOAA

Deadliest earthquakes in this area

NOAA’s significant-earthquake database lists 27 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 47 recorded deaths. The most severe:

1843M8.4
Hokkaido: Yezo, Kushiro, Nemuro
25 Apr 1843 · 196 km away
45 deathsModerate damage ($1–5M)tsunami
1894M7.9
Off Coast Of Honshu
22 Mar 1894 · 161 km away · intensity IX
1 deathModerate damage ($1–5M)tsunami
1938M6.1
E. Hokkaido Island, Japan
28 May 1938 · 275 km away
1 deathLimited damage (under $1M)tsunami
1958M8.3
Kuril Islands
6 Nov 1958 · 157 km away · intensity X
Moderate damage ($1–5M)tsunami
1963M8.5
Kuril Islands
13 Oct 1963 · 239 km away · intensity IX
Limited damage (under $1M)tsunami
1904M7.6
Hokkaido
18 Mar 1904 · 175 km away · intensity X
Limited damage (under $1M)

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

Nearby trackers