QuakeScout
Magnitude4.4

Reviewed by USGSRussia54y ago

M4.4 earthquake 108 km ESE of Ozernovskiy, Russia

Thursday, May 3, 1973, 04:36:37 UTC · 50.978°N, 157.809°E

A magnitude 4.4 earthquake struck 108 km ESE of Ozernovskiy, Russia on Thursday, May 3, 1973, 04:36:37 UTC, at a depth of 33.0 km (shallow).

Magnitude
4.4
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

60 tons of TNT

That is about 1/251 of the Hiroshima bomb. A magnitude 5.0 releases about 8 times more energy.

Tectonic setting

130 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: 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 313 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:

  1. 9.089 km ESE of Petropavlovsk-Kamchatsky, RussiaNovember 4, 1952 · 228 km NE of this epicenter
  2. 7.976 km ENE of Petropavlovsk-Kamchatsky, RussiaMay 4, 1959 · 285 km NE of this epicenter
  3. 7.7115 km ESE of Petropavlovsk-Kamchatsky, RussiaJune 25, 1904 · 261 km NE of this epicenter
  4. 7.5274 km SE of Petropavlovsk-Kamchatsky, RussiaJune 25, 1904 · 271 km E of this epicenter
  5. 7.5253 km SE of Vilyuchinsk, RussiaJune 30, 1936 · 211 km E of this epicenter
  6. 7.495 km NNE of Ozernovskiy, RussiaMay 4, 1911 · 144 km N of this epicenter
  7. 7.4156 km SE of Severo-Kuril’sk, RussiaOctober 31, 1916 · 128 km S of this epicenter
  8. 7.351 km SE of Petropavlovsk-Kamchatsky, RussiaNovember 24, 1971 · 221 km NE of this epicenter

History · NOAA

Deadliest earthquakes in this area

NOAA’s significant-earthquake database lists 18 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:

  1. 1952M9.0

    Kamchatka Peninsula

    4 Nov 1952 · 251 km away · intensity VII

    10,000 deaths$1 million damagetsunami

  2. 1737

    Kamchatka

    16 Oct 1737 · 19 km away

    100 deathstsunami

  3. 1959M8.2

    Near East Coast Of Kamchatka

    4 May 1959 · 205 km away · intensity X

    1 deathModerate damage ($1–5M)tsunami

  4. 1841M8.4

    Off Kamchatka

    17 May 1841 · 114 km away · intensity XI

    Moderate damage ($1–5M)tsunami

  5. 1973M7.2

    Kuril Islands, Hiroo, Urakawa

    28 Feb 1973 · 100 km away · intensity VIII

    Moderate damage ($1–5M)tsunami

  6. 1904M8.3

    Off Kamchatka

    25 Jun 1904 · 140 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

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