Earthquake with magnitude of Mwp 5.5 on date 03-08-2023 and time 21:33:52 (Italy) in region Alaska Peninsula, United States [Sea: United States]

A magnitude Mwp 5.5 earthquake occured in region: Alaska Peninsula, United States [Sea: United States], on

  • 03-08-2023 19:33:52 (UTC)
  • 03-08-2023 21:33:52 (UTC +02:00) Italian time
  • 03-08-2023 11:33:52 (UTC -08:00) local time in the region of the earthquake (America/Anchorage)

and geographic coordinates (lat, lon) 54.7420, -161.2790 at 32 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

No Italian municipalities within 100 km from the epicenter with at least 50000 inhabitants.

Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
mb 5.4
Mwp 5.5

Mwpd 5.8
2023-08-03
19:33:52
54.7418 -161.279 32 2023-08-03
19:53:54
Sala Sismica INGV-Roma 119833991
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-08-03 19:33:52
Latitude 54.7418
Longitude -161.2790
Depth (km) 32 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 119833991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 14691370
Semi-minor axis of confidence ellipse (meter) 2074582
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 202
Circular confidence region, given by single value of horizontal uncertainty (meter) 11975400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 65.2083
Number of associated phases, regardless of their use for origin computation 1
Number of defining phases 1
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.942643
Epicentral distance of station closest to the epicenter (degree)
Epicentral distance of station farthest from the epicenter (degree)
Number of stations at which the event was observed 0
Number of stations from which data was used for origin computation 0
Magnitudes information

Mwp:5.5

Field Value
Value 5.5
Uncertainty 0.1
Num. used stations 25
Type of magnitude Mwp
Reference to an origin 119833991
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-08-03 19:53:54

Mwpd:5.8

Field Value
Value 5.8
Uncertainty 0.1
Num. used stations 26
Type of magnitude Mwpd
Reference to an origin 119833991
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-08-03 19:53:54

mb:5.4

Field Value
Value 5.4
Uncertainty 0.1
Num. used stations 48
Type of magnitude mb
Reference to an origin 119833991
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-08-03 19:53:54
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download