M4.9 Earthquake 214 km SSE of Ola, Russia — October 27, 2021
2021-10-27 02:42:31 UTC (2021-10-27) · approx. 12:42 PM UTC+10 local
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On October 27, 2021 at 02:42 UTC, a magnitude 4.9 shallow crustal earthquake struck 214 km SSE of Ola, Russia, at a depth of 10.0 km and coordinates 57.8962°, 153.0983°.0 The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected. The nearest populated place is Ola (population 6,347).
Physical scale: An earthquake of magnitude 4.9 releases seismic energy equivalent to roughly 338 metric tons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 1.4 km — a useful intuition for the size of the slip patch on the fault.
The epicenter is located in Russia, a region characterized by the Kuril-Kamchatka subduction zone on the northwestern Pacific Ring of Fire. The nearest mapped fault system is the Kuril-Kamchatka Trench. View all earthquakes in Russia.
Learn more: Magnitude scale · Aftershock sequences
Nearest Populated Places
ShakeMap — predicted shaking intensity
Modeled ground-motion intensity contoured on the Modified Mercalli scale (MMI). Computed by the USGS from the moment-tensor solution and regional ground-motion prediction equations.
Source: U.S. Geological Survey ShakeMap. View interactive ShakeMap on USGS
Did You Feel It? — community-reported shaking
Aggregated felt-report intensity from submitted citizen responses to the USGS Did You Feel It? system. Each colored zone represents the average MMI from reports in that area.
Source: U.S. Geological Survey Did You Feel It?. View on USGS · submit your own report
Population exposure (USGS PAGER)
Estimated population that experienced each level of shaking. Based on the USGS PAGER rapid impact assessment, which combines ShakeMap output with global population grids.
| Shaking intensity (MMI) | Description | Population exposed |
|---|---|---|
| MMI 3 | weak | 4,178 |
Earthquake Details
153.0983°E
Technical Information
Common Questions
How strong was the magnitude 4.9 earthquake near Ola, Russia?
The magnitude 4.9 earthquake that struck 214 km SSE of Ola, Russia on October 27, 2021 at 02:42 UTC had a depth of 10.0 km. For context, this was a light earthquake commonly felt near the epicenter.
Where did the earthquake occur?
The earthquake epicenter was located at 57.8962°, 153.0983°, which is 214 km SSE of Ola, Russia. The nearest populated place is Ola (population 6,347). View all earthquakes in Russia.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 4.9 earthquakes can continue for several days and gradually diminish over time.
Has Russia had earthquakes this big before?
The largest recorded earthquake in Russia was the M9.0 Kamchatka earthquake of November 4, 1952. Today's magnitude 4.9 event is significantly smaller than that historical record.
Authoritative source: USGS event page (event ID: us7000fp3l). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2021, October 27, 2021). M4.9 Earthquake 214 km SSE of Ola, Russia — October 27, 2021. Retrieved January 8, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000fp3l/