Earthquake with magnitude of mb 5.5 on date 01-11-2023 and time 02:39:02 (UTC) in region Western Idaho, United States [Land: United States]

A magnitude mb 5.5 earthquake occured in region: Western Idaho, United States [Land: United States], on

  • 01-11-2023 02:39:02 (UTC)
  • 01-11-2023 03:39:02 (UTC +01:00) Italian time
  • 31-10-2023 20:39:02 (UTC -06:00) local time in the region of the earthquake (America/Boise)

and geographic coordinates (lat, lon) 44.3110, -115.2810 at 11 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
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
mb 5.5 2023-11-01
44.3109 -115.281 11 2023-11-01
Sala Sismica INGV-Roma 122633851
Preferred location and magnitude until now.
Origin information


Field Value
Time (UTC) 2023-11-01 02:39:02
Latitude 44.3109
Longitude -115.2810
Depth (km) 11 (operator assigned)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 122633851


Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 0
Semi-minor axis of confidence ellipse (meter) 0
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 0
Circular confidence region, given by single value of horizontal uncertainty (meter) 0.0
Confidence level of the uncertainty (%) 68


Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 190.352
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) 1.4052
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
Magnitude information


Field Value
Value 5.5
Uncertainty 0.6
Num. used stations 7
Type of magnitude mb
Reference to an origin 122633851
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-11-01 02:57:11
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download