Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 21-03-2023 and time 05:42:42 (Italy) in region Costa Siciliana centro settentrionale (Palermo)

A magnitude ML 1.5 earthquake occured in region: Costa Siciliana centro settentrionale (Palermo), on

  • 21-03-2023 04:42:42 (UTC)
  • 21-03-2023 05:42:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 38.2400, 13.1700 at 6 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Isola delle Femmine PA 8 7290 7290
Capaci PA 10 11446 18736
Cinisi PA 11 12418 31154
Carini PA 12 38455 69609
Terrasini PA 12 12320 81929
Torretta PA 13 4358 86287
Montelepre PA 17 6280 92567
Giardinello PA 17 2337 94904

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km NW of Palermo (674435 inhabitants)
35 Km NW of Bagheria (55387 inhabitants)
62 Km E of Trapani (68759 inhabitants)
81 Km NE of Marsala (83194 inhabitants)
83 Km NE of Mazara del Vallo (51718 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
Bulletin
Rev1000 		ML 1.5 2023-03-21
04:42:42		 38.2397 13.1705 6 2024-03-01
17:18:19		 Bollettino Sismico Italiano INGV 124160411
Reviewed
Rev100 		ML 1.5 2023-03-21
04:42:42		 38.2475 13.1667 2 2023-03-21
04:55:26		 Sala Sismica INGV-Roma 115584361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-21 04:42:42 ± 0.17
Latitude 38.2397 ± 0.0081
Longitude 13.1705 ± 0.0103
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 124160411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 870
Semi-minor axis of confidence ellipse (meter) 778
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 67
Circular confidence region, given by single value of horizontal uncertainty (meter) 870.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 151
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.16817
Epicentral distance of station farthest from the epicenter (degree) 0.76083
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 124160411
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-12-20 12:16:49

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 115584361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-21 04:55:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.USI.HHZ. 2023-03-21T04:42:59.93 0.6 undecidable manual S 1 51.9036 50 -0.11 46
IV.CSLB.HHZ. 2023-03-21T04:42:57.31 0.3 undecidable manual P 113 84.4488 50 -0.36 62
IV.ALJA.HHE. 2023-03-21T04:42:57.01 0.6 undecidable manual P 137 74.5698 50 0.85 36
IV.GIB.HHE. 2023-03-21T04:42:56.79 0.3 undecidable manual P 110 79.6647 50 -0.15 66
IV.CORL.HHZ. 2023-03-21T04:42:56.76 0.6 undecidable manual S 163 40.0266 99 0.11 48
IV.MARIO.HNZ. 2023-03-21T04:42:56.72 0.6 undecidable manual S 144 39.0276 99 0.41 45
IV.SOLUN.HHZ. 2023-03-21T04:42:55.10 0.6 undecidable manual S 117 35.5422 100 -0.02 49
IV.USI.HHZ. 2023-03-21T04:42:53.08 0.3 undecidable manual P 1 51.9036 50 0.41 65
IV.CIMI.HNZ. 2023-03-21T04:42:52.67 0.6 undecidable manual P 138 53.0025 50 -0.17 46
IV.MARIO.HNZ. 2023-03-21T04:42:50.35 0.3 undecidable manual P 144 39.0276 99 -0.17 71
IV.MBFT.HHZ. 2023-03-21T04:42:50.24 0.3 undecidable manual P 210 37.629 99 0 73
IV.CORL.HHZ. 2023-03-21T04:42:50.55 0.1 undecidable manual P 163 40.0266 99 -0.16 94
IV.MPG.HHZ. 2023-03-21T04:42:49.62 0.3 undecidable manual S 118 18.6702 108 0.22 72
IV.SOLUN.HHZ. 2023-03-21T04:42:49.54 0.3 undecidable manual P 117 35.5422 100 -0.29 69
IV.MPG.HHZ. 2023-03-21T04:42:46.48 0.1 negative manual P 118 18.6702 108 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MPG.HHE. ML:1.5 0.000252 0.16 AML other m 2023-03-21T04:42:49.91
IV.MPG.HHN. ML:1.7 0.00040806375 0.1792 AML other m 2023-03-21T04:42:50.45
IV.CORL.HHE. ML:1.7 0.0001825 1.48 AML other m 2023-03-21T04:42:57.95
IV.MBFT.HHE. ML:1.1 0.000049449999999999996 0.54 AML other m 2023-03-21T04:42:59.55
IV.SOLUN.HHN. ML:1.3 0.00007626491 0.2208 AML other m 2023-03-21T04:43:00.71
IV.USI.HHN. ML:2.2 0.0003615 0.68 AML other m 2023-03-21T04:43:02.41
IV.SOLUN.HHE. ML:1.3 0.00008724999999999999 0.56 AML other m 2023-03-21T04:43:02.62
IV.USI.HHE. ML:1.7 0.000141 0.72 AML other m 2023-03-21T04:43:02.40
IV.MBFT.HHN. ML:1.0 0.00004165 0.42 AML other m 2023-03-21T04:43:03.96
IV.CORL.HHN. ML:1.4 0.00009815 0.42 AML other m 2023-03-21T04:43:04.16
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