M7.5 earthquake 97 km ESE of Ozernovskiy, Russia

Tuesday, June 8, 1993, 13:03:36 UTC · 51.218°N, 157.829°E

A magnitude 7.5 earthquake struck 97 km ESE of Ozernovskiy, Russia on Tuesday, June 8, 1993, 13:03:36 UTC, at a depth of 70.6 km (intermediate). It is the strongest earthquake within 300 km since an M7.9 on May 4, 1959.

Magnitude: 7.5; Major · mw
Depth: 71 km; Intermediate
Felt reports: 0; Did You Feel It?
Est. shaking: VII; Very strong (ShakeMap)
PAGER alert: None; Not issued
Tsunami: No flag; USGS feed

Outlined circle: this earthquakeDashed circle: 200 km aftershock search areaColoured lines: estimated shaking intensity (USGS ShakeMap)

In context

How big was it, and why here?

Energy released

2.7 megatons of TNT

That is about 178 times the Hiroshima bomb. It released about 5,623 times the energy of a magnitude 5.0.

Tectonic setting

142 km

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

Depth: intermediate

71 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 200 km

USGS lists 24 M2.5+ earthquakes within 200 km in the following 30 days; the largest was M6.3 on June 12, 1993. 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 644 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 20 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 10,101 recorded deaths. The most severe:

1952M9.0
Kamchatka Peninsula
4 Nov 1952 · 229 km away · intensity VII
10,000 deaths$1 million damagetsunami
1737
Kamchatka
16 Oct 1737 · 18 km away
100 deathstsunami
1959M8.2
Near East Coast Of Kamchatka
4 May 1959 · 183 km away · intensity X
1 deathModerate damage ($1–5M)tsunami
1841M8.4
Off Kamchatka
17 May 1841 · 88 km away · intensity XI
Moderate damage ($1–5M)tsunami
1973M7.2
Kuril Islands, Hiroo, Urakawa
28 Feb 1973 · 118 km away · intensity VIII
Moderate damage ($1–5M)tsunami
1904M8.3
Off Kamchatka
25 Jun 1904 · 119 km away · intensity X
Limited damage (under $1M)tsunami

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

Nearby trackers