Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 11-09-2023 and time 03:46:26 (Italy) in region Tirreno Meridionale (MARE)

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

  • 11-09-2023 01:46:26 (UTC)
  • 11-09-2023 03:46:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.6310, 14.1620 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
84 Km NE of Bagheria (55387 inhabitants)
90 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 2023-09-11
01:46:26		 38.6313 14.1617 10 2023-09-11
02:19:37		 Sala Sismica INGV-Roma 120960011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-09-11 01:46:26 ± 0.25
Latitude 38.6313 ± 0.0153
Longitude 14.1617 ± 0.0127
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 120960011

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1830
Semi-minor axis of confidence ellipse (meter) 880
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 338
Circular confidence region, given by single value of horizontal uncertainty (meter) 1830.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 239
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.33005
Epicentral distance of station farthest from the epicenter (degree) 0.99825
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 120960011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-09-11 02:19:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MUCR.HHZ. 2023-09-11T01:46:52.60 0.6 undecidable manual S 136 90.0432 50 -0.36 45
IV.CSLB.HHZ. 2023-09-11T01:46:49.08 0.3 undecidable manual S 187 77.4669 50 -0.55 65
IV.PLLN.EHZ. 2023-09-11T01:46:48.93 0.6 undecidable manual S 181 70.8735 50 1.07 36
IV.GIB.HHZ. 2023-09-11T01:46:48.40 0.6 undecidable manual S 189 72.0723 50 0.21 48
IV.NOV.HHE. 2023-09-11T01:46:44.86 0.1 undecidable manual P 128 108.114 50 0.42 86
IV.CORL.HHE. 2023-09-11T01:46:44.51 0.1 undecidable manual P 223 110.8002 50 -0.34 87
IV.CIMI.HHE. 2023-09-11T01:46:43.01 0.1 undecidable manual P 212 97.7244 50 0.17 93
IV.MARIO.HHE. 2023-09-11T01:46:42.91 0.1 undecidable manual P 220 98.3238 50 -0.02 95
IV.LIBRI.HHE. 2023-09-11T01:46:41.11 0.1 undecidable manual P 132 90.243 50 -0.58 84
IV.MUCR.HHZ. 2023-09-11T01:46:41.00 0.1 undecidable manual P 136 90.0432 50 -0.65 82
IV.SOLUN.HHE. 2023-09-11T01:46:40.33 0.1 undecidable manual P 223 81.0522 50 0.05 98
IV.PLLN.EHZ. 2023-09-11T01:46:39.09 0.6 negative manual P 181 70.8735 50 0.39 47
3D.OEM4.HHE. 2023-09-11T01:46:39.28 0.1 undecidable manual P 110 72.0723 50 0.39 93
IV.CSLB.HHZ. 2023-09-11T01:46:39.71 0.6 negative manual P 187 77.4669 50 -0.01 49
IV.MSFR.HHE. 2023-09-11T01:46:39.77 0.1 undecidable manual P 150 76.0683 50 0.26 95
IV.IVLT.HHE. 2023-09-11T01:46:39.40 0.1 undecidable manual P 111 73.0713 50 0.36 94
IV.GIB.HHZ. 2023-09-11T01:46:38.83 0.1 undecidable manual P 189 72.0723 50 -0.06 99
3D.OEM8.HHE. 2023-09-11T01:46:38.34 0.1 undecidable manual P 105 67.9764 50 0.09 100
IV.IFIL.HHE. 2023-09-11T01:46:33.06 0.1 undecidable manual P 102 36.6411 50 -0.37 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSLB.HHN. ML:1.4 0.000041750000000000005 0.82 AML other m 2023-09-11T01:46:50.89
IV.GIB.HHN. ML:2.0 0.000151 0.7 AML other m 2023-09-11T01:46:51.13
IV.CSLB.HHE. ML:1.4 0.0000335 0.5 AML other m 2023-09-11T01:46:51.58
IV.GIB.HHE. ML:1.9 0.0001245 0.38 AML other m 2023-09-11T01:46:54.42
IV.MUCR.HHN. ML:2.2 0.000203 0.42 AML other m 2023-09-11T01:46:57.16
IV.MUCR.HHE. ML:1.8 0.0000741 0.96 AML other m 2023-09-11T01:46:59.39
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