Earthquake with magnitude of Mwp 6.8 on date 09-09-2023 and time 00:11:00 (Italy) in region Morocco

A magnitude Mwp 6.8 earthquake occured in region: Morocco, on

  • 08-09-2023 22:11:00 (UTC)
  • 09-09-2023 00:11:00 (UTC +02:00) Italian time
  • 08-09-2023 23:11:00 (UTC +01:00) local time in the region of the earthquake (Africa/Casablanca)

and geographic coordinates (lat, lon) 31.0540, -8.3940 at 10 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 5.7
Mwp 6.8

Mwpd 7.0
2023-09-08
22:11:00
31.0535 -8.3936 10 2023-09-08
22:25:26
Sala Sismica INGV-Roma 120894211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-08 22:11:00
Latitude 31.0535
Longitude -8.3936
Depth (km) 10 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 120894211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 9459
Semi-minor axis of confidence ellipse (meter) 6533
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 334
Circular confidence region, given by single value of horizontal uncertainty (meter) 7642.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 43.76
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) 1.3691
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:6.8

Field Value
Value 6.8
Uncertainty 0.1
Num. used stations 86
Type of magnitude Mwp
Reference to an origin 120894211
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2023-09-08 22:25:26

Mwpd:7.0

Field Value
Value 7.0
Uncertainty 0.1
Num. used stations 71
Type of magnitude Mwpd
Reference to an origin 120894211
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2023-09-08 22:25:26

mb:5.7

Field Value
Value 5.7
Uncertainty 0.2
Num. used stations 87
Type of magnitude mb
Reference to an origin 120894211
Agency INGV
Autore early-est_ee1.1.9
Time of creation (UTC) 2023-09-08 22:25:26
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Finite source from geodetic data
The rupture distribution along the seismic source is derived from the analysis of displacement maps (InSAR) obtained through the processing of Sentinel-1, European Space Agency, radar images. InSAR data are produced by the EPOSAR (IREA-CNR) service.

Focal Plane FP2

This source model, derived from 4 InSAR dataset(s) including from 3 to 12 days after the event, is characterized by a single ENE-WSW oriented fault (strike 248°), dipping towards the NNW at 69° degrees and a mainly inverse rupture with a left-lateral component (rake 75°). Slip peak is approximately 2.0 m at a depth of 23.3 km. The energy released is 1.6E+19 Nm, corresponding to an M 6.8 earthquake. InSAR data, model and ancillary information can be found in the data_and_model.zip file, available for download
Expected surface displacement scenario
This section shows maps of the predicted surface displacement based on a finite fault derived from focal mechanisms. Images contain maps of simulated displacement; they only provide qualitative indications about the expected displacement. Use the pull-down menu to select a scenario from those available. Finite fault dimensions and mean slip are based on the scaling factore in Leonard (2010), doi 10.1785/0120090189. Scenarios are available only for a limited period after the event
Ascending and descending predicted fringes from the above displacement scenario
Ascending and descending predicted fringes from the above displacement scenario
Sar Image Footprints and Acquisitions
SAR image footprints and acquisition time for the Sentinel-1 (European Space Agency) satellite constellation.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download