Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 28-06-2015 and time 06:57:37 (Italy) in region 1 km SE Petralia Soprana (PA)

A magnitude ML 1.8 earthquake occured in region: 1 km SE Petralia Soprana (PA), on

  • 28-06-2015 04:57:37 (UTC)
  • 28-06-2015 06:57:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7920, 14.1150 at 46 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
Petralia Soprana PA 1 3360 3360
Petralia Sottana PA 3 2821 6181
Bompietro PA 5 1401 7582
Blufi PA 5 1029 8611
Castellana Sicula PA 6 3411 12022
Gangi PA 8 6811 18833
Geraci Siculo PA 8 1945 20778
Polizzi Generosa PA 10 3407 24185
Alimena PA 11 2032 26217
Resuttano CL 14 2038 28255
San Mauro Castelverde PA 15 1701 29956
Castelbuono PA 16 8943 38899
Isnello PA 19 1589 40488
Scillato PA 20 613 41101

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km N of Caltanissetta (63360 inhabitants)
62 Km SE of Bagheria (55387 inhabitants)
71 Km NE of Agrigento (59770 inhabitants)
75 Km SE of Palermo (674435 inhabitants)
82 Km N of Gela (75827 inhabitants)
92 Km W of Catania (314555 inhabitants)
95 Km W of Acireale (52622 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 2015-06-28
04:57:37		 37.7925 14.1147 46 2016-01-08
08:45:27		 Bollettino Sismico Italiano INGV 22414451
Reviewed
Rev100 		ML 1.9 2015-06-28
04:57:37		 37.7907 14.1167 48 2015-06-28
05:07:06		 Sala Sismica INGV-Roma 19964391
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2015-06-28 04:57:37 ± 0.32
Latitude 37.7925 ± 0.0198
Longitude 14.1147 ± 0.0193
Depth (km) 46 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 22414451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2258
Semi-minor axis of confidence ellipse (meter) 1255
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 16
Circular confidence region, given by single value of horizontal uncertainty (meter) 2260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.74644
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 3
Type of magnitude ML
Reference to an origin 22414451
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-11-24 14:53:32

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 3
Type of magnitude ML
Reference to an origin 19964391
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2015-06-28 05:07:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HLNI.HHZ. 2015-06-28T04:58:03.44 0.1 undecidable manual S 126 82.8504 101 0.5 79
IV.ALJA.HHZ. 2015-06-28T04:57:53.02 0.1 undecidable manual S 261 32.0457 135 -0.04 95
IV.HLNI.HHZ. 2015-06-28T04:57:52.37 0.1 undecidable manual P 126 82.8504 101 0.1 86
IV.RESU.HHZ. 2015-06-28T04:57:51.36 0.1 undecidable manual S 197 16.9719 154 0.2 94
IV.CSLB.HHZ. 2015-06-28T04:57:51.26 0.1 undecidable manual S 343 16.872 154 0.11 97
IV.PETRA.HHZ. 2015-06-28T04:57:50.43 0.1 undecidable manual S 0 4.5954 173 0.03 100
IV.GMB.BHZ. 2015-06-28T04:57:47.26 3.0 undecidable manual P 0.1 0
IV.GALF.HHZ. 2015-06-28T04:57:46.33 0.1 undecidable manual P 103 40.626 125 -1.06 66
IV.ALJA.HHZ. 2015-06-28T04:57:46.44 0.1 undecidable manual P 261 32.0457 135 -0.13 93
IV.GIB.HHZ. 2015-06-28T04:57:46.38 0.1 undecidable manual P 341 23.2545 145 0.51 88
IV.RESU.HHZ. 2015-06-28T04:57:45.26 0.1 undecidable manual P 197 16.9719 154 -0.21 94
IV.CSLB.HHZ. 2015-06-28T04:57:45.52 0.1 undecidable manual P 343 16.872 154 0.06 98
IV.PETRA.HHZ. 2015-06-28T04:57:44.79 0.1 undecidable manual P 0 4.5954 173 -0.24 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ALJA.HHE. ML:1.6 0.00008785 0.38 AML other m 2015-06-28T04:57:53.57
IV.ALJA.HHN. ML:1.6 0.00008985 1.42 AML other m 2015-06-28T04:57:56.57
IV.PETRA.HHE. ML:2.0 0.00028500000000000004 0.52 AML other m 2015-06-28T04:57:51.30
IV.PETRA.HHN. ML:2.0 0.00027449999999999995 0.4 AML other m 2015-06-28T04:57:51.74
IV.RESU.HHE. ML:1.9 0.0002035 0.6 AML other m 2015-06-28T04:57:51.53
IV.RESU.HHN. ML:2.0 0.000268 0.92 AML other m 2015-06-28T04:57:52.09
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