Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of mb 4.5 on date 15-09-2023 and time 22:57:14 (UTC) in region Southern Greece [Sea: Greece]

A magnitude mb 4.5 earthquake occured in region: Southern Greece [Sea: Greece], on

  • 15-09-2023 22:57:14 (UTC)
  • 16-09-2023 00:57:14 (UTC +02:00) Italian time
  • 16-09-2023 01:57:14 (UTC +03:00) local time in the region of the earthquake (Europe/Athens)

and geographic coordinates (lat, lon) 37.0540, 23.9910 at 146 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.

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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 4.5
Mwp 6.5 		2023-09-15
22:57:14		 37.0538 23.9911 146 2023-09-15
23:07:57		 Sala Sismica INGV-Roma 121090771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-15 22:57:14
Latitude 37.0538
Longitude 23.9911
Depth (km) 146 (from location)
Evaluation mode of Origin automatic
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV-A
Event type earthquake
Origin ID 121090771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2084200
Semi-minor axis of confidence ellipse (meter) 570143
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 30
Circular confidence region, given by single value of horizontal uncertainty (meter) 1734130.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 106.368
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 1.03654
Epicentral distance of station closest to the epicenter (degree) 1.22856
Epicentral distance of station farthest from the epicenter (degree) 11.74568
Number of stations at which the event was observed 25
Number of stations from which data was used for origin computation 25
Magnitudes information

Mwp:6.5

Field Value
Value 6.5
Uncertainty 0.0
Num. used stations 1
Type of magnitude Mwp
Reference to an origin 121090771
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-09-15 23:07:57

mb:4.5

Field Value
Value 4.5
Uncertainty 0.5
Num. used stations 15
Type of magnitude mb
Reference to an origin 121090771
Agency INGV
Autore Auto added
Time of creation (UTC) 2023-09-15 23:07:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GE.EIL.BHZ. 2023-09-15T22:59:56.20 10.0 positive automatic P 126 1303.7727 -0.630757 0.930233
IV.MGAB.BHZ. 2023-09-15T22:59:47.65 10.0 positive automatic P 306 1199.6991 1.86394 0.952381
GE.MSBI.BHZ. 2023-09-15T22:59:46.60 10.0 positive automatic P 118 1221.5217 -0.84704 0.930233
IV.LNSS.BHZ. 2023-09-15T22:59:35.00 10.0 positive automatic P 307 1116.9153 0.760929 0.930233
IV.TRIV.HHZ. 2023-09-15T22:59:16.85 10.0 positive automatic P 306 963.0138 0.160668 0.970874
IV.GIB.BHZ. 2023-09-15T22:59:07.25 10.0 positive automatic P 280 882.9495 0.117819 0.97561
ML.XLND.BHZ. 2023-09-15T22:59:06.00 10.0 positive automatic P 266 878.2653 -0.390603 0.869565
GE.CSS.BHZ. 2023-09-15T22:59:05.15 10.0 positive automatic P 103 869.7627 -0.137947 0.930233
IV.SGTA.HHZ. 2023-09-15T22:59:04.09 10.0 positive automatic P 304 869.6406 -1.40846 0.980392
MN.WDD.BHZ. 2023-09-15T22:59:04.42 10.0 positive automatic P 264 855.6102 1.91007 0.97561
ML.MSDA.BHZ. 2023-09-15T22:59:03.85 10.0 positive automatic P 264 857.7192 -0.0747198 1.97554
MN.CUC.BHZ. 2023-09-15T22:58:54.82 10.0 positive automatic P 297 780.9294 0.055873 0.930234
GE.MATE.BHZ. 2023-09-15T22:58:49.20 10.0 positive automatic P 305 745.2318 -0.678569 0.47619
MN.PDG.BHZ. 2023-09-15T22:58:45.47 10.0 positive automatic P 327 720.1569 -1.94619 0.869565
IV.SERS.HHZ. 2023-09-15T22:58:41.50 10.0 positive automatic P 291 674.9355 -0.597674 0.943564
IV.SCTE.HHZ. 2023-09-15T22:58:30.31 10.0 positive automatic P 307 584.6814 -0.766159 0.643495
HL.RDO.HHZ. 2023-09-15T22:58:18.69 10.0 positive automatic P 16 473.1708 1.25921 0.970874
MN.KEK.BHZ. 2023-09-15T22:58:16.75 10.0 positive automatic P 310 469.2747 -0.579165 0.930233
AC.SRN.HHZ. 2023-09-15T22:58:16.69 10.0 positive automatic P 313 467.532 -0.392637 0.980392
HL.ARG.HHZ. 2023-09-15T22:58:09.04 10.0 positive automatic P 103 379.4757 1.6593 0.980392
HT.LIT.HHZ. 2023-09-15T22:58:05.38 10.0 positive automatic P 339 362.4039 0.572596 0.492611
KO.DKL.HHZ. 2023-09-15T22:58:03.95 10.0 positive automatic P 48 339.0939 1.89295 0.192308
MN.IDI.HHZ. 2023-09-15T22:57:47.18 10.0 positive automatic P 157 211.899 -0.917931 0.993789
HL.ITM.HHZ. 2023-09-15T22:57:45.39 10.0 positive automatic P 275 183.372 0.281636 1.7261
GE.APE.BHZ. 2023-09-15T22:57:39.91 10.0 positive automatic P 89 136.3746 -0.390027 0.952381
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