Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 15-04-2018 and time 22:59:53 (Italy) in region 2 km S Pollina (PA)

A magnitude ML 1.9 earthquake occured in region: 2 km S Pollina (PA), on

  • 15-04-2018 20:59:53 (UTC)
  • 15-04-2018 22:59:53 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.9740, 14.1490 at 6 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
Pollina PA 2 2974 2974
Castelbuono PA 7 8943 11917
San Mauro Castelverde PA 7 1701 13618
Tusa ME 8 2925 16543
Pettineo ME 13 1350 17893
Geraci Siculo PA 13 1945 19838
Isnello PA 13 1589 21427
Cefalù PA 13 14393 35820
Motta d'Affermo ME 14 739 36559
Gratteri PA 15 963 37522
Castel di Lucio ME 17 1294 38816
Reitano ME 17 806 39622
Santo Stefano di Camastra ME 18 4694 44316
Lascari PA 18 3588 47904
Petralia Sottana PA 19 2821 50725
Mistretta ME 19 4791 55516
Collesano PA 19 4054 59570
Petralia Soprana PA 20 3360 62930
Gangi PA 20 6811 69741

Municipalities with at least 50000 inhabitants

An earthquake occurred to
54 Km N of Caltanissetta (63360 inhabitants)
57 Km E of Bagheria (55387 inhabitants)
71 Km E of Palermo (674435 inhabitants)
89 Km NE of Agrigento (59770 inhabitants)
98 Km NW of Catania (314555 inhabitants)
98 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 1.9 2018-04-15
20:59:53		 37.9737 14.149 6 2019-04-24
14:49:36		 Bollettino Sismico Italiano INGV 57674801
Reviewed
Rev100 		ML 2.0 2018-04-15
20:59:52		 37.9502 14.1408 5 2018-04-15
21:15:58		 Sala Sismica INGV-Roma 55670301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-04-15 20:59:53 ± 0.15
Latitude 37.9737 ± 0.0090
Longitude 14.1490 ± 0.0125
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 57674801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1049
Semi-minor axis of confidence ellipse (meter) 937
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) 1050.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 62
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.78511
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 57674801
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-06-10 12:49:53

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 55670301
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-04-15 21:15:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMGO.HHZ. 2018-04-15T21:00:14.52 3.0 undecidable manual P 1.52 0
IV.MBFT.HHZ. 2018-04-15T21:00:13.74 3.0 undecidable manual P 1.3 0
IV.ILLI.HHZ. 2018-04-15T21:00:09.65 0.6 positive manual P 53 87.1461 50 0.37 41
IV.EPZF.HHZ. 2018-04-15T21:00:06.64 0.6 undecidable manual P 105 64.1913 50 0.91 35
IV.IACL.HHZ. 2018-04-15T21:00:06.11 0.3 undecidable manual P 16 64.5909 50 0.31 64
IV.MUCR.HHZ. 2018-04-15T21:00:04.46 0.3 undecidable manual P 83 63.7917 50 -1.22 45
IV.CAGR.HHZ. 2018-04-15T21:00:04.21 0.6 undecidable manual P 142 49.7169 50 0.71 39
IV.SOLUN.HHZ. 2018-04-15T21:00:03.88 0.3 undecidable manual P 284 55.4001 50 -0.5 63
IV.ALJA.HHN. 2018-04-15T21:00:02.35 0.6 undecidable manual P 234 42.624 97 0.03 47
IV.RESU.HHZ. 2018-04-15T21:00:01.54 0.6 undecidable manual P 193 37.1295 98 0.31 45
IV.PETRA.HHZ. 2018-04-15T20:59:59.70 0.3 undecidable manual S 191 15.873 109 0.19 72
IV.GIB.HHZ. 2018-04-15T20:59:58.50 0.3 undecidable manual S 280 10.878 117 0.57 66
IV.CSLB.HHZ. 2018-04-15T20:59:57.30 0.3 undecidable manual S 243 8.88 121 -0.04 75
IV.PETRA.HHZ. 2018-04-15T20:59:56.59 0.3 undecidable manual P 191 15.873 109 -0.46 68
IV.GIB.HHZ. 2018-04-15T20:59:56.11 0.1 undecidable manual P 280 10.878 117 -0.04 100
IV.CSLB.HHZ. 2018-04-15T20:59:55.52 0.1 undecidable manual P 243 8.88 121 -0.28 96
IV.PLLN.EHZ. 2018-04-15T20:59:55.80 0.3 undecidable manual S 346 2.1978 158 0.06 76
IV.PLLN.EHZ. 2018-04-15T20:59:54.74 0.1 undecidable manual P 346 2.1978 158 -0.14 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PETRA.HHE. ML:2.5 0.0032626384999999997 0.4864 AML other m 2018-04-15T21:00:00.49
IV.GIB.HHN. ML:1.9 0.0013227294999999999 0.4864 AML other m 2018-04-15T21:00:00.61
IV.GIB.HHE. ML:1.8 0.0010279043 0.3328 AML other m 2018-04-15T21:00:01.33
IV.PETRA.HHN. ML:2.5 0.003172836 0.2816 AML other m 2018-04-15T21:00:01.43
IV.CSLB.HHN. ML:1.8 0.0010749903000000002 0.64 AML other m 2018-04-15T21:00:02.82
IV.CSLB.HHE. ML:1.5 0.0005501447500000001 0.6528 AML other m 2018-04-15T21:00:03.26
IV.RESU.HHE. ML:1.7 0.00021658740000000002 0.4992 AML other m 2018-04-15T21:00:15.64
IV.MUCR.HHE. ML:1.9 0.00016268165 0.384 AML other m 2018-04-15T21:00:19.07
IV.IACL.HHN. ML:2.2 0.00031490800000000003 0.2432 AML other m 2018-04-15T21:00:19.57
IV.MUCR.HHN. ML:1.8 0.00011533385000000001 0.4992 AML other m 2018-04-15T21:00:19.43
IV.RESU.HHN. ML:1.8 0.00022903335000000003 0.96 AML other m 2018-04-15T21:00:24.45
IV.IACL.HHE. ML:2.1 0.00021702644999999998 0.6016 AML other m 2018-04-15T21:00:27.06
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