Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 05-04-2023 and time 12:59:38 (Italy) in region 7 km SW Castelbuono (PA)

A magnitude ML 1.4 earthquake occured in region: 7 km SW Castelbuono (PA), on

  • 05-04-2023 10:59:38 (UTC)
  • 05-04-2023 12:59:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8850, 14.0440 at 29 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
Castelbuono PA 7 8943 8943
Isnello PA 8 1589 10532
Polizzi Generosa PA 9 3407 13939
Petralia Sottana PA 10 2821 16760
Geraci Siculo PA 10 1945 18705
Collesano PA 10 4054 22759
Gratteri PA 11 963 23722
Petralia Soprana PA 11 3360 27082
Castellana Sicula PA 11 3411 30493
Scillato PA 12 613 31106
San Mauro Castelverde PA 13 1701 32807
Blufi PA 15 1029 33836
Caltavuturo PA 15 4017 37853
Pollina PA 15 2974 40827
Lascari PA 16 3588 44415
Bompietro PA 16 1401 45816
Gangi PA 17 6811 52627
Cefalù PA 18 14393 67020
Sclafani Bagni PA 18 426 67446
Campofelice di Roccella PA 18 7537 74983

Municipalities with at least 50000 inhabitants

An earthquake occurred to
44 Km N of Caltanissetta (63360 inhabitants)
52 Km E of Bagheria (55387 inhabitants)
65 Km E of Palermo (674435 inhabitants)
76 Km NE of Agrigento (59770 inhabitants)
93 Km N 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 1.4 2023-04-05
10:59:38		 37.8848 14.0443 29 2024-03-01
17:18:19		 Bollettino Sismico Italiano INGV 124545741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-05 10:59:38 ± 0.38
Latitude 37.8848 ± 0.0099
Longitude 14.0443 ± 0.0262
Depth (km) 29 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 124545741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2238
Semi-minor axis of confidence ellipse (meter) 791
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 283
Circular confidence region, given by single value of horizontal uncertainty (meter) 2240.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 193
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.05396
Epicentral distance of station farthest from the epicenter (degree) 0.67269
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 124545741
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-01-08 17:48:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MUCR.HHZ. 2023-04-05T10:59:51.47 0.3 undecidable manual P 76 74.6697 106 0.03 67
IV.RESU.HHZ. 2023-04-05T10:59:50.06 0.6 undecidable manual S 178 26.4513 134 0.31 46
IV.PLLN.EHZ. 2023-04-05T10:59:47.98 0.6 undecidable manual S 36 14.7741 151 0.16 48
IV.MSFR.HHZ. 2023-04-05T10:59:47.93 1.0 undecidable manual P 71 50.616 114 -0.03 23
IV.GALF.HHZ. 2023-04-05T10:59:47.72 0.3 undecidable manual P 113 49.7169 115 -0.1 68
IV.CSLB.HHZ. 2023-04-05T10:59:46.57 0.6 undecidable manual S 11 5.994 167 -0.4 47
IV.RESU.HHZ. 2023-04-05T10:59:44.59 0.3 undecidable manual P 178 26.4513 134 -0.24 70
IV.CSLB.HHZ. 2023-04-05T10:59:43.26 0.1 undecidable manual P 11 5.994 167 0.03 100
IV.PLLN.EHZ. 2023-04-05T10:59:43.93 0.3 undecidable manual P 36 14.7741 151 0.21 71
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSLB.HHE. ML:1.3 0.00009845 0.88 AML other m 2023-04-05T10:59:47.39
IV.ALJA.HHE. ML:1.6 0.00011764999999999999 1.16 AML other m 2023-04-05T10:59:48.41
IV.CSLB.HHN. ML:1.3 0.0001115 0.48 AML other m 2023-04-05T10:59:48.38
IV.PLLN.EHE. ML:1.7 0.00021050000000000002 0.56 AML other m 2023-04-05T10:59:49.88
IV.PLLN.EHN. ML:1.9 0.0003415 0.66 AML other m 2023-04-05T10:59:50.65
IV.RESU.HHE. ML:1.1 0.0000513 1.2 AML other m 2023-04-05T10:59:51.35
IV.RESU.HHN. ML:1.2 0.00005365 0.6 AML other m 2023-04-05T10:59:53.26
IV.ALJA.HHN. ML:1.6 0.00011750000000000001 1.08 AML other m 2023-04-05T10:59:55.09
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