Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.4 on date 28-07-2017 and time 11:35:13 (Italy) in region 9 km E Valledolmo (PA)

A magnitude ML 2.4 earthquake occured in region: 9 km E Valledolmo (PA), on

  • 28-07-2017 09:35:13 (UTC)
  • 28-07-2017 11:35:13 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7450, 13.9320 at 4 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
Valledolmo PA 9 3594 3594
Caltavuturo PA 9 4017 7611
Polizzi Generosa PA 10 3407 11018
Castellana Sicula PA 11 3411 14429
Sclafani Bagni PA 11 426 14855
Resuttano CL 11 2038 16893
Vallelunga Pratameno CL 11 3461 20354
Villalba CL 13 1633 21987
Scillato PA 13 613 22600
Blufi PA 13 1029 23629
Bompietro PA 15 1401 25030
Petralia Sottana PA 16 2821 27851
Marianopoli CL 16 1906 29757
Petralia Soprana PA 17 3360 33117
Alimena PA 17 2032 35149
Montemaggiore Belsito PA 19 3365 38514
Aliminusa PA 19 1236 39750
Santa Caterina Villarmosa CL 19 5388 45138
Alia PA 20 3623 48761
Collesano PA 20 4054 52815

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NW of Caltanissetta (63360 inhabitants)
52 Km SE of Bagheria (55387 inhabitants)
57 Km NE of Agrigento (59770 inhabitants)
65 Km SE of Palermo (674435 inhabitants)
81 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 2.4 2017-07-28
09:35:13		 37.7452 13.9322 4 2018-07-06
12:40:16		 Bollettino Sismico Italiano INGV 51445701
Reviewed
Rev100 		ML 2.5 2017-07-28
09:35:13		 37.7368 13.9227 1 2017-07-28
09:47:04		 Sala Sismica INGV-Roma 48422551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-07-28 09:35:13 ± 0.15
Latitude 37.7452 ± 0.0081
Longitude 13.9322 ± 0.0102
Depth (km) 4 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 51445701

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 908
Semi-minor axis of confidence ellipse (meter) 267
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 142
Circular confidence region, given by single value of horizontal uncertainty (meter) 910.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 66
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.49
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.95328
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:2.5

Field Value
Value 2.5
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 48422551
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-07-28 09:47:04

ML:2.4

Field Value
Value 2.4
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 51445701
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-10-30 09:18:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MEU.SHZ. 2017-07-28T09:35:32.31 0.1 undecidable manual P 131 105.8163 50 0.44 81
IV.MUCR.HHZ. 2017-07-28T09:35:28.82 0.1 undecidable manual P 68 88.8444 50 -0.43 84
IV.CLTA.HHE. 2017-07-28T09:35:26.76 0.1 undecidable manual P 178 65.1903 50 1.16 65
IV.MPG.SHE. 2017-07-28T09:35:26.72 0.1 undecidable manual P 313 68.0763 50 0.66 81
IV.MNO.SHZ. 2017-07-28T09:35:26.04 0.1 negative manual P 73 69.9744 50 -0.3 90
IV.MSFR.HHZ. 2017-07-28T09:35:25.28 0.1 undecidable manual P 61 65.9895 50 -0.45 88
IV.PLLN.EHZ. 2017-07-28T09:35:25.46 0.3 undecidable manual S 34 33.0447 98 0.6 66
IV.GALF.HHZ. 2017-07-28T09:35:24.16 0.1 undecidable manual P 94 55.7997 50 0 98
IV.CORL.HHZ. 2017-07-28T09:35:24.56 0.1 undecidable manual P 287 57.498 50 0.14 95
IV.GIB.HHZ. 2017-07-28T09:35:23.80 0.3 undecidable manual S 17 28.3494 99 0.55 68
IV.SOLUN.HHE. 2017-07-28T09:35:23.07 0.1 undecidable manual P 318 52.0035 50 -0.5 89
IV.CSLB.HHZ. 2017-07-28T09:35:22.66 0.6 undecidable manual S 27 23.9538 100 0.91 40
IV.PETRA.HHZ. 2017-07-28T09:35:20.68 0.6 undecidable manual S 58 18.7701 103 0.71 43
IV.ALJA.HHZ. 2017-07-28T09:35:19.82 0.6 undecidable manual S 272 15.6732 106 0.9 40
IV.RESU.HHZ. 2017-07-28T09:35:19.22 0.3 undecidable manual S 135 15.4734 106 0.37 73
IV.PLLN.EHZ. 2017-07-28T09:35:19.85 0.1 undecidable manual P 34 33.0447 98 -0.12 100
IV.MCT.BHN. 2017-07-28T09:35:19.45 0.6 undecidable manual P 0.23 47
IV.GIB.HHZ. 2017-07-28T09:35:18.81 0.1 undecidable manual P 17 28.3494 99 -0.23 99
IV.CSLB.HHZ. 2017-07-28T09:35:17.49 0.1 positive manual P 27 23.9538 100 -0.68 87
IV.RESU.HHZ. 2017-07-28T09:35:16.06 0.1 positive manual P 135 15.4734 106 -0.44 96
IV.PETRA.HHZ. 2017-07-28T09:35:16.76 0.1 positive manual P 58 18.7701 103 -0.38 97
IV.ALJA.HHZ. 2017-07-28T09:35:15.94 0.1 positive manual P 272 15.6732 106 -0.6 91
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ALJA.HHE. ML:2.4 0.002629273 0.24 AML other m 2017-07-28T09:35:21.15
IV.ALJA.HHN. ML:2.4 0.0024227335 0.26 AML other m 2017-07-28T09:35:22.63
IV.PETRA.HHE. ML:2.6 0.003124658 0.36 AML other m 2017-07-28T09:35:23.90
IV.CSLB.HHE. ML:2.2 0.0010868020999999998 1.64 AML other m 2017-07-28T09:35:25.07
IV.CSLB.HHN. ML:2.1 0.0009150374000000001 0.36 AML other m 2017-07-28T09:35:26.34
IV.GIB.HHN. ML:2.6 0.002301086 0.46 AML other m 2017-07-28T09:35:27.08
IV.PLLN.EHN. ML:2.4 0.0012894135 0.46 AML other m 2017-07-28T09:35:29.96
IV.PETRA.HHN. ML:2.6 0.003649487 0.52 AML other m 2017-07-28T09:35:30.07
IV.GIB.HHE. ML:2.5 0.001854534 1.02 AML other m 2017-07-28T09:35:32.58
IV.PLLN.EHE. ML:2.5 0.0013092905 1.38 AML other m 2017-07-28T09:35:36.93
IV.MSFR.HHN. ML:2.1 0.00021936034999999997 1.06 AML other m 2017-07-28T09:35:39.81
IV.MSFR.HHE. ML:2.1 0.00022305819999999998 0.84 AML other m 2017-07-28T09:35:43.98
IV.CORL.HHE. ML:2.5 0.00072477805 0.4 AML other m 2017-07-28T09:35:44.45
IV.CORL.HHN. ML:2.4 0.00058421905 0.66 AML other m 2017-07-28T09:35:45.48
IV.GALF.HHN. ML:2.5 0.00075264925 1.42 AML other m 2017-07-28T09:35:45.25
IV.MNO.SHN. ML:0.0 0.0005701272 0.8 AML other m 2017-07-28T09:35:47.26
IV.MNO.SHE. ML:0.0 0.00041497455 1.28 AML other m 2017-07-28T09:35:47.00
IV.GALF.HHE. ML:2.4 0.0006327491 0.52 AML other m 2017-07-28T09:35:48.69
IV.MUCR.HHN. ML:2.7 0.00060984 1.44 AML other m 2017-07-28T09:35:50.06
IV.MUCR.HHE. ML:2.5 0.0003862375 0.76 AML other m 2017-07-28T09:35:52.74
IV.MEU.SHN. ML:0.0 0.0003232255 0.36 AML other m 2017-07-28T09:35:53.86
IV.MEU.SHE. ML:0.0 0.00032170635 0.4 AML other m 2017-07-28T09:35:54.44
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
Waveforms Seismic signals in miniseed + resp format Download