Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 24-04-2020 and time 14:32:37 (UTC) in region 2 km W Blufi (PA)

A magnitude ML 1.8 earthquake occured in region: 2 km W Blufi (PA), on

  • 24-04-2020 14:32:37 (UTC)
  • 24-04-2020 16:32:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7580, 14.0540 at 43 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Blufi PA 2 1029 1029
Castellana Sicula PA 3 3411 4440
Bompietro PA 4 1401 5841
Petralia Sottana PA 6 2821 8662
Petralia Soprana PA 7 3360 12022
Polizzi Generosa PA 8 3407 15429
Resuttano CL 9 2038 17467
Alimena PA 9 2032 19499
Gangi PA 14 6811 26310
Geraci Siculo PA 14 1945 28255
Caltavuturo PA 16 4017 32272
Scillato PA 17 613 32885
Santa Caterina Villarmosa CL 19 5388 38273
Sclafani Bagni PA 19 426 38699
Valledolmo PA 20 3594 42293
Castelbuono PA 20 8943 51236

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km N of Caltanissetta (63360 inhabitants)
60 Km SE of Bagheria (55387 inhabitants)
65 Km NE of Agrigento (59770 inhabitants)
73 Km SE of Palermo (674435 inhabitants)
79 Km N of Gela (75827 inhabitants)
95 Km W of Catania (314555 inhabitants)
99 Km W of Acireale (52622 inhabitants)
100 Km NW of Vittoria (63339 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 1.8 2020-04-24
14:32:37		 37.758 14.0542 43 2020-07-18
21:08:40		 Bollettino Sismico Italiano INGV 80112671
Reviewed
Rev100 		ML 1.7 2020-04-24
14:32:37		 37.7642 14.0788 43 2020-04-24
14:55:15		 Sala Sismica INGV-Roma 78536821
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-24 14:32:37 ± 0.35
Latitude 37.7580 ± 0.0153
Longitude 14.0542 ± 0.0341
Depth (km) 43 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 80112671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2663
Semi-minor axis of confidence ellipse (meter) 1932
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 265
Circular confidence region, given by single value of horizontal uncertainty (meter) 2660.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.08903
Epicentral distance of station farthest from the epicenter (degree) 0.78151
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 80112671
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-06-12 11:33:37

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 78536821
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-24 14:55:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HVZN.HHE. 2020-04-24T14:33:04.28 0.6 undecidable manual S 138 86.7465 97 0.47 41
IV.PLLN.EHE. 2020-04-24T14:32:52.54 0.6 undecidable manual S 17 27.1506 138 0.47 45
IV.HVZN.HHE. 2020-04-24T14:32:52.37 0.3 undecidable manual P 138 86.7465 97 -0.45 61
IV.GIB.HHE. 2020-04-24T14:32:52.65 0.6 undecidable manual S 355 25.8519 139 0.76 41
IV.CLTA.HHE. 2020-04-24T14:32:51.07 0.3 undecidable manual P 187 67.0773 102 0.67 60
IV.CSLB.HHZ. 2020-04-24T14:32:51.20 0.6 undecidable manual S 1 19.869 148 0.07 50
IV.RESU.HHZ. 2020-04-24T14:32:50.70 0.6 undecidable manual S 179 12.3765 159 0.3 49
IV.PETRA.HHZ. 2020-04-24T14:32:49.84 0.6 undecidable manual S 32 9.879 163 -0.39 47
IV.SCIAR.HHE. 2020-04-24T14:32:46.97 0.3 undecidable manual P 307 33.5442 130 0.35 69
IV.PLLN.EHE. 2020-04-24T14:32:46.04 0.1 undecidable manual P 17 27.1506 138 0 100
IV.GIB.HHE. 2020-04-24T14:32:46.09 0.1 undecidable manual P 355 25.8519 139 0.15 97
IV.CSLB.HHZ. 2020-04-24T14:32:45.03 0.1 undecidable manual P 1 19.869 148 -0.46 92
IV.RESU.HHZ. 2020-04-24T14:32:44.75 0.1 undecidable manual P 179 12.3765 159 -0.33 96
IV.PETRA.HHZ. 2020-04-24T14:32:44.46 0.1 undecidable manual P 32 9.879 163 -0.52 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PETRA.HHE. ML:2.0 0.00033 1.62 AML other m 2020-04-24T14:32:50.03
IV.RESU.HHE. ML:1.9 0.0002615 0.54 AML other m 2020-04-24T14:32:51.37
IV.CSLB.HHN. ML:1.4 0.00008245 0.48 AML other m 2020-04-24T14:32:51.78
IV.CSLB.HHE. ML:1.3 0.0000537 0.5 AML other m 2020-04-24T14:32:51.57
IV.PETRA.HHN. ML:1.7 0.0001545 0.36 AML other m 2020-04-24T14:32:51.72
IV.RESU.HHN. ML:2.0 0.0002915 0.78 AML other m 2020-04-24T14:32:52.02
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