Reviewed by USGSRussia17d ago
M4.4 earthquake 186 km SE of Petropavlovsk-Kamchatsky, Russia
Wednesday, September 9, 2026, 23:01:22 UTC · 51.871°N, 160.557°E
A magnitude 4.4 earthquake struck 186 km SE of Petropavlovsk-Kamchatsky, Russia on Wednesday, September 9, 2026, 23:01:22 UTC, at a depth of 10.0 km (shallow).
- Magnitude
- 4.4
- Light · mb
- 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 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
15 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 50 km
USGS has not published any M2.5+ earthquake within 50 km since this event.
Regional history
Past M5+ earthquakes within 300 km
USGS lists 1,427 M5.0+ earthquakes within 300 km before this one (catalog from 1900; older records are less complete). The strongest:
- 9.089 km ESE of Petropavlovsk-Kamchatsky, RussiaNovember 4, 1952 · 99 km NW of this epicenter
- 8.82025 Kamchatka Peninsula, Russia EarthquakeJuly 29, 2025 · 73 km N of this epicenter
- 8.41923 Kamchatka, Russia EarthquakeFebruary 3, 1923 · 291 km N of this epicenter
- 7.976 km ENE of Petropavlovsk-Kamchatsky, RussiaMay 4, 1959 · 164 km N of this epicenter
- 7.8140 km E of Petropavlovsk-Kamchatsky, RussiaSeptember 18, 2025 · 142 km N of this epicenter
- 7.7115 km ESE of Petropavlovsk-Kamchatsky, RussiaJune 25, 1904 · 101 km N of this epicenter
- 7.5274 km SE of Petropavlovsk-Kamchatsky, RussiaJune 25, 1904 · 90 km SE of this epicenter
- 7.597 km ESE of Ozernovskiy, RussiaJune 8, 1993 · 202 km W of this epicenter
History · NOAA
Deadliest earthquakes in this area
NOAA’s significant-earthquake database lists 24 damaging, deadly or tsunami-generating earthquakes within 300 km of this epicenter since 1700, which together caused about 10,105 recorded deaths. The most severe:
- 1952M9.0
Kamchatka Peninsula
4 Nov 1952 · 104 km away · intensity VII
10,000 deaths$1 million damagetsunami
- 1737
Kamchatka
16 Oct 1737 · 197 km away
100 deathstsunami
- 1923M8.4
Kamchatka
3 Feb 1923 · 291 km away · intensity XI
3 deaths$2 million damagetsunami
- 2025M8.8
Kamchatka Peninsula
29 Jul 2025 · 73 km away · intensity VIII
1 death$10 million damagetsunami
- 1959M8.2
Near East Coast Of Kamchatka
4 May 1959 · 100 km away · intensity X
1 deathModerate damage ($1–5M)tsunami
- 1841M8.4
Off Kamchatka
17 May 1841 · 176 km away · intensity XI
Moderate damage ($1–5M)tsunami
NOAA NCEI Global Significant Earthquake Database. Historical figures are estimates; older records are incomplete.