Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 09-10-2023 and time 00:15:34 (UTC) in region Tirreno Meridionale (MARE)

A magnitude ML 1.8 earthquake occured in region: Tirreno Meridionale (MARE), on

  • 09-10-2023 00:15:34 (UTC)
  • 09-10-2023 02:15:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.4290, 13.9490 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.

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Municipalities within 20 km from the epicenter

No Italian municipalities within 20 km distance.

Municipalities with at least 50000 inhabitants

An earthquake occurred to
54 Km NE of Bagheria (55387 inhabitants)
62 Km NE of Palermo (674435 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 		ML 1.8 2023-10-09
00:15:34		 38.4288 13.9487 10 2023-10-09
00:20:29		 Sala Sismica INGV-Roma 121908621
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-10-09 00:15:34 ± 0.22
Latitude 38.4288 ± 0.0126
Longitude 13.9487 ± 0.0115
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 121908621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1450
Semi-minor axis of confidence ellipse (meter) 840
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) 1450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 194
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.86695
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 121908621
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-10-09 00:20:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RAFF.HHZ. 2023-10-09T00:15:57.87 3.0 negative manual P 0.5 0
7C.SPAOL.HNZ. 2023-10-09T00:15:57.04 3.0 undecidable manual P -0.09 0
IV.IFIL.HHZ. 2023-10-09T00:15:52.22 0.3 undecidable manual S 74 56.3991 50 0.18 72
IV.MPG.HHZ. 2023-10-09T00:15:52.80 0.3 undecidable manual S 240 59.1963 50 0.03 74
IV.GALF.HHZ. 2023-10-09T00:15:51.16 0.1 undecidable manual P 146 96.2259 50 0.5 83
IV.CSLB.HHZ. 2023-10-09T00:15:51.58 0.6 undecidable manual S 170 55.3002 50 -0.16 48
IV.PLLN.EHZ. 2023-10-09T00:15:51.13 0.6 undecidable manual S 161 51.3153 50 0.47 45
IV.GIB.HHZ. 2023-10-09T00:15:50.47 0.6 undecidable manual S 172 49.1175 50 0.39 47
IV.RESU.HHZ. 2023-10-09T00:15:49.53 1.0 negative manual P 174 87.246 50 0.25 22
IV.MUCR.HHZ. 2023-10-09T00:15:49.53 0.1 undecidable manual P 118 91.242 50 -0.37 86
IV.ALJA.HHZ. 2023-10-09T00:15:47.68 0.1 undecidable manual P 193 77.2671 50 -0.06 95
IV.MPG.HHZ. 2023-10-09T00:15:45.38 0.6 positive manual P 240 59.1963 50 0.43 45
IV.IFIL.HHZ. 2023-10-09T00:15:44.65 1.0 negative manual P 74 56.3991 50 0.12 24
IV.CSLB.HHZ. 2023-10-09T00:15:43.69 0.1 undecidable manual P 170 55.3002 50 -0.67 84
IV.PLLN.EHZ. 2023-10-09T00:15:43.33 0.6 positive manual P 161 51.3153 50 -0.4 46
IV.GIB.HHZ. 2023-10-09T00:15:43.35 0.1 undecidable manual P 172 49.1175 50 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSLB.HNE. ML:1.8 0.000149 0.4 AML other m 2023-10-09T00:15:51.59
IV.CSLB.HHE. ML:1.8 0.00013350000000000002 0.8 AML other m 2023-10-09T00:15:51.79
IV.CSLB.HNN. ML:1.7 0.0001225 1.34 AML other m 2023-10-09T00:15:52.73
IV.CSLB.HHN. ML:1.7 0.00011 1.36 AML other m 2023-10-09T00:15:52.74
IV.GIB.HHN. ML:2.3 0.0004974999999999999 0.32 AML other m 2023-10-09T00:15:52.31
IV.PLLN.EHE. ML:2.0 0.000261 1.06 AML other m 2023-10-09T00:15:52.98
IV.GIB.HHE. ML:2.0 0.0003 0.38 AML other m 2023-10-09T00:15:52.86
IV.PLLN.EHN. ML:2.3 0.0004555 0.3 AML other m 2023-10-09T00:15:53.61
IV.IFIL.HHN. ML:2.1 0.0002825 0.5 AML other m 2023-10-09T00:15:53.69
IV.IFIL.HHE. ML:2.4 0.000567 0.26 AML other m 2023-10-09T00:15:53.97
IV.MPG.HHN. ML:1.4 0.0000559 0.88 AML other m 2023-10-09T00:15:54.74
IV.MPG.HHE. ML:1.5 0.0000576 0.22 AML other m 2023-10-09T00:15:55.86
IV.ALJA.HHE. ML:1.7 0.00008185000000000001 0.52 AML other m 2023-10-09T00:16:00.61
IV.ALJA.HHN. ML:1.7 0.00007664999999999999 0.36 AML other m 2023-10-09T00:16:01.24
IV.MUCR.HHN. ML:1.6 0.000049250000000000004 0.82 AML other m 2023-10-09T00:16:03.92
IV.MUCR.HHE. ML:1.6 0.0000474 0.38 AML other m 2023-10-09T00:16:05.41
IV.RESU.HHN. ML:1.5 0.000038350000000000004 0.84 AML other m 2023-10-09T00:16:08.01
IV.RESU.HHE. ML:1.4 0.000032149999999999995 0.4 AML other m 2023-10-09T00:16:13.58
IV.GALF.HHN. ML:2.0 0.00010700000000000001 0.82 AML other m 2023-10-09T00:16:13.29
IV.GALF.HHE. ML:2.0 0.00011499999999999999 1.28 AML other m 2023-10-09T00:16:20.92
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