Earthquakes / EVENT RECORD
M 5.0 - 81 km S of Sand Point, Alaska
USGS · Every measurement below belongs to the selected record.
Read the source-series history ↗Around the epicentre
Regional view · markers are locations, not affected areas
Magnitude
M 5
Scale: mwr
Depth
35 km
operator assigned
Reported by people
2
Number of felt reports
USGS review
reviewed
Review does not imply final measurements
What the record tells us
USGS reports a magnitude 5 earthquake in 81 km S of Sand Point, Alaska, at a depth of 35 km.
Detailed source data captured 2026-10-20 15:25:15 UTC.
Measurements & confidence
- Event time (UTC)
- 2026-10-20 10:40:40.968 UTC
- Source updated (UTC)
- 2026-10-20 14:50:52.580 UTC
- Location
- 54.609°, -160.329°
- Stations used for location
- 120
- Horizontal error
- 6.64 km
- Depth error
- 1.904 km
- Magnitude error
- 0.075
Errors are the source’s reported uncertainty estimates, not guaranteed bounds. A depth marked “operator assigned” was fixed during analysis.
Shaking & impact
- Instrumental intensity
- Not published
- Felt-report intensity
- 3.1 CDI
- PAGER impact alert
- Not published
No published assessment does not mean no shaking or no impact. A magnitude value alone cannot establish damage or a tsunami warning.
Nearby seismic activity
Within 500 km · M2.5+ · seven days before the event through the latest query, up to seven days after
10-13
0
10-14
1
10-15
6
10-16
7
10-17
3
10-18
4
10-19
2
10-20
0
Query window: 2026-10-13 10:40:40 to 2026-10-20 15:25:15 UTC. This is spatial proximity, not an identified aftershock sequence.
Magnitude
M 5
Scale: mwr
Depth
35 km
operator assigned
Reported by people
2
Number of felt reports
USGS review
reviewed
Review does not imply final measurements
What the record tells us
USGS reports a magnitude 5 earthquake in 81 km S of Sand Point, Alaska, at a depth of 35 km.
Detailed source data captured 2026-10-20 15:25:15 UTC.
Measurements & confidence
- Event time (UTC)
- 2026-10-20 10:40:40.968 UTC
- Source updated (UTC)
- 2026-10-20 14:50:52.580 UTC
- Location
- 54.609°, -160.329°
- Stations used for location
- 120
- Horizontal error
- 6.64 km
- Depth error
- 1.904 km
- Magnitude error
- 0.075
Errors are the source’s reported uncertainty estimates, not guaranteed bounds. A depth marked “operator assigned” was fixed during analysis.
Shaking & impact
- Instrumental intensity
- Not published
- Felt-report intensity
- 3.1 CDI
- PAGER impact alert
- Not published
No published assessment does not mean no shaking or no impact. A magnitude value alone cannot establish damage or a tsunami warning.
Nearby seismic activity
Within 500 km · M2.5+ · seven days before the event through the latest query, up to seven days after
10-13
0
10-14
1
10-15
6
10-16
7
10-17
3
10-18
4
10-19
2
10-20
0
Query window: 2026-10-13 10:40:40 to 2026-10-20 15:25:15 UTC. This is spatial proximity, not an identified aftershock sequence.
The record as it develops
This timeline begins when our journal started capturing details. It is not a complete USGS revision history.
Captured 2026-10-20 11:17:08 UTC
First detailed capture · M5 · 35 km deep · 23 nearby records
Source updated 2026-10-20 11:01:40 UTC
Captured 2026-10-20 11:32:11 UTC
Updated capture · M5 · 35 km deep · 23 nearby records
Source updated 2026-10-20 11:25:03 UTC
Captured 2026-10-20 11:44:28 UTC
Updated capture · M5 · 35 km deep · 23 nearby records
Source updated 2026-10-20 11:41:34 UTC
Captured 2026-10-20 12:49:09 UTC
Updated capture · M5 · 35 km deep · 23 nearby records
Source updated 2026-10-20 11:41:34 UTC
Captured 2026-10-20 13:04:09 UTC
Updated capture · M5 · 35 km deep · 23 nearby records
Source updated 2026-10-20 12:50:46 UTC
Captured 2026-10-20 14:04:09 UTC
Updated capture · M5 · 35 km deep · 0 nearby records
Source updated 2026-10-20 12:50:46 UTC
Captured 2026-10-20 15:25:15 UTC
Updated capture · M5 · 35 km deep · 23 nearby records
Source updated 2026-10-20 14:50:52 UTC
Magnitude is not shaking
Magnitude describes the earthquake’s size. The shaking experienced at a place depends on distance, depth, local ground conditions and the rupture.
Depth needs context
A reported depth describes the location of the earthquake underground. Some solutions use an assigned depth; uncertainty and review status matter.
Nearby does not mean aftershock
Our regional search finds events by distance and time. Establishing an aftershock sequence requires seismological assessment.
This is a source-linked archive. Source measurements and assessments can change. An archived bulletin is not evidence that a warning is currently active.
In the daily journal
20 October 2026 ↗SOURCE ID usgs:us6000u3lf