Earthquakes · USGS earthquakes

Magnitude 6.5 earthquake recorded 165 km W of Nikolski, Alaska

The United States Geological Survey recorded a magnitude 6.5 earthquake 165 km W of Nikolski, Alaska on 17 September 2026.

The United States Geological Survey (USGS) recorded an earthquake of magnitude 6.5 on the moment magnitude (Mww) scale at 14:19 UTC on 17 September 2026. USGS gives the depth as 111.7 km and describes the location as “165 km W of Nikolski, Alaska”.

USGS lists the solution status for this record as “reviewed”. The agency revises earthquake parameters as more instrument data arrives, so magnitude and depth can change after first publication. Any such change is shown in the revision history on this page.

This brief reports only what the USGS record states: magnitude, location, depth and time. It does not describe shaking felt, damage, casualties or any consequence of the earthquake, because the record used here does not establish those things.

Times

These are different things and are not interchangeable.

Event occurred: 17 September 2026, 14:19 UTC (as recorded by the source)
Source last revised: 17 September 2026, 16:29 UTC
Published here: 17 September 2026, 14:46 UTC
Last changed here: 17 September 2026, 15:02 UTC

Evidence

Original record: https://earthquake.usgs.gov/earthquakes/eventpage/us7000ti1p
Record identifier: us7000ti1p
Retrieved: 17 September 2026, 16:31 UTC
Snapshot checksum: 38d4b719747c1cafb43f51683f3b42f1e3bf0f9ed092e2b2ad1c15e9ae8e1f22
Attribution: Earthquake data: U.S. Geological Survey (USGS). — USGS data licensing guidance

Where each figure above comes from (8 values)

Value	As published	Origin	Source field or calculation
Magnitude	6.5	calculation	round(properties.mag, 1) Rounded to one decimal for display; the exact value is kept.
Magnitude scale	moment magnitude (Mww)	calculation	MAG_TYPE_LABELS[properties.magType] Unrecognised scale codes are reported without a name.
Location as described by USGS	165 km W of Nikolski, Alaska	field	properties.place
Depth	111.7 km	calculation	round(geometry.coordinates[2], 1)
Event time	2026-09-17T14:19:53.164000+00:00	calculation	datetime.fromtimestamp(properties.time / 1000, tz=UTC) USGS reports milliseconds since the Unix epoch, in UTC.
Latitude	52.7648	field	geometry.coordinates[1]
Longitude	-171.2949	field	geometry.coordinates[0]
Solution status	reviewed	field	properties.status

Wording template earthquake version 1.0.

Revision history

17 September 2026, 15:02 UTC — The source revised its record

The source revised its record. The figures above now follow the revised record; the previous wording is kept below.

Show the wording this replaced

Magnitude 6.5 earthquake recorded 166 km W of Nikolski, Alaska

The United States Geological Survey (USGS) recorded an earthquake of magnitude 6.5 on the moment magnitude (Mww) scale at 14:19 UTC on 17 September 2026. USGS gives the depth as 108.4 km and describes the location as “166 km W of Nikolski, Alaska”.
USGS lists the solution status for this record as “reviewed”. The agency revises earthquake parameters as more instrument data arrives, so magnitude and depth can change after first publication. Any such change is shown in the revision history on this page.
This brief reports only what the USGS record states: magnitude, location, depth and time. It does not describe shaking felt, damage, casualties or any consequence of the earthquake, because the record used here does not establish those things.
17 September 2026, 14:46 UTC — First publication

Assembled from the source record listed under evidence.

Limits of this brief

Reviewed earthquakes of magnitude 6.0 and above, worldwide. Only magnitude, location, depth and time are reported, together with any later revision USGS makes. Automatic solutions USGS has not yet reviewed, events it classifies as something other than an earthquake, and anything below magnitude 6.0 are not reported. Effects, damage and casualties are never reported, because the USGS record used here does not establish them.

If something here is wrong, write to [email protected] quoting the record identifier above. Corrections are recorded on this page, not made silently.