M6.3 Earthquake in the Balleny Islands region — February 21, 2022
2022-02-21 23:24:13 UTC (2022-02-21) · approx. 10:24 AM UTC+11 local
On February 21, 2022 at 23:24 UTC, a magnitude 6.3 shallow crustal earthquake struck in the Balleny Islands region, at a depth of 14.0 km and coordinates -69.7739°, 165.3918°. The USGS PAGER system issued a green alert level for this event, indicating no significant casualties or damage expected.
Physical scale: An earthquake of magnitude 6.3 releases seismic energy equivalent to roughly 43 kilotons of TNT. Empirical fault-scaling laws (Wells & Coppersmith, 1994) estimate the subsurface rupture length at approximately 13 km — a useful intuition for the size of the slip patch on the fault.
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
Earthquake Details
165.3918°E
Technical Information
Common Questions
How strong was the magnitude 6.3 earthquake in the Balleny Islands region?
The magnitude 6.3 earthquake that struck in the Balleny Islands region on February 21, 2022 at 23:24 UTC had a depth of 14.0 km. For context, this was a strong earthquake capable of causing significant damage.
Where did the earthquake occur?
The earthquake epicenter was located at -69.7739°, 165.3918°, which is in the Balleny Islands region.
Were there aftershocks?
Aftershock activity is monitored continuously by the USGS. Aftershock sequences from magnitude 6.3 earthquakes can continue for weeks to months and gradually diminish over time.
Actions
Authoritative source: USGS event page (event ID: us7000gmtt). All scientific values on this page are sourced verbatim from the USGS feed.
Cite this page: EarthquakeTracker.org. (2022, February 21, 2022). M6.3 Earthquake in the Balleny Islands region — February 21, 2022. Retrieved May 4, 2022 from https://www.earthquaketracker.org/earthquakes/event/us7000gmtt/