Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 30-03-2023 and time 04:26:57 (Italy) in region 4 km SE Aliminusa (PA)

A magnitude ML 1.3 earthquake occured in region: 4 km SE Aliminusa (PA), on

  • 30-03-2023 02:26:57 (UTC)
  • 30-03-2023 04:26:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8450, 13.8140 at 24 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
Aliminusa PA 4 1236 1236
Sclafani Bagni PA 4 426 1662
Montemaggiore Belsito PA 5 3365 5027
Cerda PA 7 5330 10357
Caltavuturo PA 7 4017 14374
Scillato PA 8 613 14987
Sciara PA 9 2822 17809
Valledolmo PA 11 3594 21403
Alia PA 11 3623 25026
Collesano PA 14 4054 29080
Roccapalumba PA 16 2516 31596
Caccamo PA 16 8196 39792
Polizzi Generosa PA 17 3407 43199
Campofelice di Roccella PA 18 7537 50736
Vallelunga Pratameno CL 18 3461 54197
Termini Imerese PA 19 26263 80460
Gratteri PA 20 963 81423

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SE of Bagheria (55387 inhabitants)
45 Km NW of Caltanissetta (63360 inhabitants)
50 Km SE of Palermo (674435 inhabitants)
63 Km NE of Agrigento (59770 inhabitants)
95 Km NW of Gela (75827 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 1.3 2023-03-30
02:26:57		 37.8447 13.8143 24 2024-03-01
17:18:19		 Bollettino Sismico Italiano INGV 124449301
Reviewed
Rev100 		ML 1.3 2023-03-30
02:26:57		 37.8 13.85 21 2023-03-30
03:23:28		 Sala Sismica INGV-Roma 115872711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-30 02:26:57 ± 0.48
Latitude 37.8447 ± 0.0135
Longitude 13.8143 ± 0.0205
Depth (km) 24 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 124449301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1607
Semi-minor axis of confidence ellipse (meter) 1126
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 104
Circular confidence region, given by single value of horizontal uncertainty (meter) 1610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 128
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
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) 0.10702
Epicentral distance of station farthest from the epicenter (degree) 0.29857
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 124449301
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-01-03 12:17:54

ML:1.3

Field Value
Value 1.3
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 115872711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-30 03:23:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RESU.HHE. 2023-03-30T02:27:09.08 0.6 undecidable manual S 136 30.5472 122 -0.13 51
IV.GIB.HHZ. 2023-03-30T02:27:08.36 0.6 undecidable manual S 49 24.5532 129 0.45 47
IV.CSLB.HHZ. 2023-03-30T02:27:07.02 0.6 undecidable manual S 64 23.6541 130 -0.7 43
IV.ALJA.HHZ. 2023-03-30T02:27:06.06 0.6 undecidable manual S 207 11.877 151 0.37 48
IV.PLLN.EHZ. 2023-03-30T02:27:04.51 0.3 undecidable manual P 60 33.1446 119 -0.11 74
IV.RESU.HHE. 2023-03-30T02:27:04.59 0.3 undecidable manual P 136 30.5472 122 0.31 71
IV.CSLB.HHZ. 2023-03-30T02:27:03.26 0.1 undecidable manual P 64 23.6541 130 -0.16 100
IV.CIMI.HHE. 2023-03-30T02:27:03.08 1.0 undecidable manual P 281 21.5673 133 -0.09 25
IV.GIB.HHZ. 2023-03-30T02:27:03.88 0.1 positive manual P 49 24.5532 129 0.35 96
IV.ALJA.HHZ. 2023-03-30T02:27:01.79 0.3 undecidable manual P 207 11.877 151 -0.45 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.GIB.HHE. ML:1.3 0.0000918 0.46 AML other m 2023-03-30T02:27:08.50
IV.GIB.HHN. ML:1.3 0.0000788 0.48 AML other m 2023-03-30T02:27:08.80
IV.ALJA.HHE. ML:1.0 0.0000596 0.92 AML other m 2023-03-30T02:27:09.93
IV.ALJA.HHN. ML:1.1 0.00006845 0.34 AML other m 2023-03-30T02:27:09.74
IV.MFNL.HHE. ML:2.0 0.000131 0.16 AML other m 2023-03-30T02:27:29.32
IV.MFNL.HHN. ML:2.1 0.000155 0.7 AML other m 2023-03-30T02:27:45.44
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