Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.9 on date 21-06-2018 and time 23:00:24 (Italy) in region 10 km E Alimena (PA)

A magnitude ML 1.9 earthquake occured in region: 10 km E Alimena (PA), on

  • 21-06-2018 21:00:24 (UTC)
  • 21-06-2018 23:00:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6870, 14.2280 at 50 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
Alimena PA 10 2032 2032
Calascibetta EN 12 4528 6560
Villarosa EN 12 4937 11497
Gangi PA 13 6811 18308
Bompietro PA 13 1401 19709
Enna EN 14 28019 47728
Sperlinga EN 14 805 48533
Blufi PA 15 1029 49562
Leonforte EN 15 13439 63001
Petralia Soprana PA 16 3360 66361
Nicosia EN 17 13899 80260
Resuttano CL 17 2038 82298
Petralia Sottana PA 18 2821 85119
Assoro EN 19 5191 90310
Castellana Sicula PA 19 3411 93721
Nissoria EN 20 3000 96721

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km NE of Caltanissetta (63360 inhabitants)
69 Km N of Gela (75827 inhabitants)
71 Km NE of Agrigento (59770 inhabitants)
77 Km SE of Bagheria (55387 inhabitants)
79 Km W of Catania (314555 inhabitants)
83 Km W of Acireale (52622 inhabitants)
87 Km NW of Vittoria (63339 inhabitants)
90 Km SE of Palermo (674435 inhabitants)
96 Km NW of Ragusa (73313 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 2018-06-21
21:00:24		 37.6873 14.2278 50 2019-04-24
14:50:46		 Bollettino Sismico Italiano INGV 58386471
Reviewed
Rev100 		ML 1.9 2018-06-21
21:00:23		 37.6657 14.217 54 2018-06-21
21:09:52		 Sala Sismica INGV-Roma 58029101
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-06-21 21:00:24 ± 0.17
Latitude 37.6873 ± 0.0081
Longitude 14.2278 ± 0.0114
Depth (km) 50 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 58386471

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1031
Semi-minor axis of confidence ellipse (meter) 735
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 33
Circular confidence region, given by single value of horizontal uncertainty (meter) 1030.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 86
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.14119
Epicentral distance of station farthest from the epicenter (degree) 0.94609
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 31
Type of magnitude ML
Reference to an origin 58386471
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-07-03 08:42:45

ML:1.9

Field Value
Value 1.9
Uncertainty 0.2
Num. used stations 30
Type of magnitude ML
Reference to an origin 58029101
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-06-21 21:09:52
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.AGST.EHZ. 2018-06-21T21:00:53.49 0.6 undecidable manual S 118 100.122 102 -0.19 45
IV.HMDC.HHZ. 2018-06-21T21:00:53.12 0.6 undecidable manual S 149 94.4388 103 0.63 41
IV.HAGA.HHZ. 2018-06-21T21:00:51.91 0.6 undecidable manual S 118 93.0402 103 -0.28 45
IV.MUCR.HHZ. 2018-06-21T21:00:47.89 0.6 undecidable manual S 55 68.9754 111 0.67 41
IV.ILLI.HHZ. 2018-06-21T21:00:42.14 0.6 undecidable manual P 37 105.0171 101 0.15 44
IV.GIB.HHZ. 2018-06-21T21:00:41.88 0.6 undecidable manual S 332 37.9287 133 0.37 49
IV.IVPL.HHZ. 2018-06-21T21:00:41.35 0.6 undecidable manual P 40 100.8213 102 -0.12 46
IV.PLLN.EHZ. 2018-06-21T21:00:41.04 0.6 undecidable manual S 348 34.6431 136 0.03 53
IV.AGST.EHZ. 2018-06-21T21:00:40.81 0.6 undecidable manual P 118 100.122 102 -0.57 41
IV.AIO.HHE. 2018-06-21T21:00:40.87 0.6 undecidable manual P 70 93.5397 103 0.28 44
IV.HMDC.HHZ. 2018-06-21T21:00:40.97 0.6 undecidable manual P 149 94.4388 103 0.27 45
IV.NOV.HHZ. 2018-06-21T21:00:40.13 0.6 undecidable manual P 64 88.1451 104 0.2 45
IV.GALF.HHZ. 2018-06-21T21:00:40.35 0.6 undecidable manual S 85 29.8479 141 0.03 53
IV.PETRA.HHZ. 2018-06-21T21:00:39.25 0.6 undecidable manual S 329 18.9699 154 0.18 53
IV.HAGA.HHZ. 2018-06-21T21:00:39.89 0.6 undecidable manual P 118 93.0402 103 -0.63 41
IV.RESU.HHZ. 2018-06-21T21:00:39.14 0.6 undecidable manual S 253 15.6732 158 0.36 52
IV.EPOZ.HHZ. 2018-06-21T21:00:39.73 0.6 undecidable manual P 91 84.3489 105 0.25 45
IV.SOLUN.HHE. 2018-06-21T21:00:38.95 0.6 undecidable manual P 307 75.6687 108 0.51 44
IV.MUCR.HHZ. 2018-06-21T21:00:37.70 0.6 undecidable manual P 55 68.9754 111 0.04 49
IV.ESML.HHE. 2018-06-21T21:00:36.28 0.6 undecidable manual P 97 57.6978 117 -0.1 50
IV.RAFF.HHZ. 2018-06-21T21:00:36.07 0.3 undecidable manual P 167 52.9026 121 0.21 74
IV.GIB.HHZ. 2018-06-21T21:00:34.27 0.3 undecidable manual P 332 37.9287 133 -0.09 77
IV.CSLB.HHZ. 2018-06-21T21:00:33.33 0.6 undecidable manual P 332 31.5462 139 -0.48 48
IV.PLLN.EHZ. 2018-06-21T21:00:33.65 0.6 undecidable manual P 348 34.6431 136 -0.43 49
IV.GALF.HHZ. 2018-06-21T21:00:33.19 0.3 undecidable manual P 85 29.8479 141 -0.49 72
IV.CAGR.HHZ. 2018-06-21T21:00:33.49 0.6 undecidable manual P 107 24.9528 147 0.17 52
IV.RESU.HHZ. 2018-06-21T21:00:32.87 0.6 undecidable manual P 253 15.6732 158 0.08 54
IV.PETRA.HHZ. 2018-06-21T21:00:32.58 0.1 positive manual P 329 18.9699 154 -0.38 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PETRA.HHE. ML:0.0 0.0001197808 0.2304 AML other m 2018-06-21T21:00:39.44
IV.GALF.HHE. ML:0.0 0.00012618415 0.6272 AML other m 2018-06-21T21:00:40.63
IV.PETRA.HHN. ML:0.0 0.00011069984999999998 0.256 AML other m 2018-06-21T21:00:41.12
IV.CSLB.HHE. ML:1.3 0.0000421 1.34 AML other m 2018-06-21T21:00:41.01
IV.RESU.HHE. ML:0.0 0.00008067822999999999 0.3968 AML other m 2018-06-21T21:00:41.22
IV.PLLN.EHE. ML:1.9 0.0001525 1.06 AML other m 2018-06-21T21:00:41.74
IV.RESU.HHN. ML:0.0 0.00008371191 0.3456 AML other m 2018-06-21T21:00:41.84
IV.GALF.HHN. ML:0.0 0.0001687082 0.3968 AML other m 2018-06-21T21:00:42.09
IV.GIB.HHN. ML:2.2 0.00028649999999999997 0.38 AML other m 2018-06-21T21:00:43.91
IV.CSLB.HHN. ML:1.3 0.00004475 0.3 AML other m 2018-06-21T21:00:43.61
IV.GIB.HHE. ML:1.8 0.000131 1.02 AML other m 2018-06-21T21:00:44.25
IV.PLLN.EHN. ML:2.1 0.000242 0.44 AML other m 2018-06-21T21:00:44.50
IV.CAGR.HHE. ML:1.8 0.00013700000000000002 1.28 AML other m 2018-06-21T21:00:45.64
IV.RAFF.HHE. ML:0.0 0.00014542995 0.2176 AML other m 2018-06-21T21:00:46.93
IV.RAFF.HHN. ML:0.0 0.000079625955 0.256 AML other m 2018-06-21T21:00:47.05
IV.CAGR.HHN. ML:1.8 0.000148 0.82 AML other m 2018-06-21T21:00:47.89
IV.MUCR.HHN. ML:0.0 0.00011378810000000001 0.3584 AML other m 2018-06-21T21:00:50.42
IV.MUCR.HHE. ML:1.9 0.0001008 1.16 AML other m 2018-06-21T21:00:50.79
IV.HAGA.HHN. ML:0.0 0.00006452944000000001 0.1024 AML other m 2018-06-21T21:00:52.33
IV.HAGA.HHE. ML:0.0 0.00006384898999999999 0.2176 AML other m 2018-06-21T21:00:51.92
IV.NOV.HHE. ML:0.0 0.000110029 0.2944 AML other m 2018-06-21T21:00:52.40
IV.NOV.HHN. ML:0.0 0.00008940846 0.32 AML other m 2018-06-21T21:00:52.57
IV.HMDC.HHN. ML:0.0 0.0001656347 0.1408 AML other m 2018-06-21T21:00:53.34
IV.HMDC.HHE. ML:0.0 0.0001795 1.32 AML other m 2018-06-21T21:00:54.24
IV.IVPL.HHN. ML:1.9 0.0000688 0.62 AML other m 2018-06-21T21:00:57.29
IV.ILLI.HHE. ML:2.4 0.000182 0.74 AML other m 2018-06-21T21:00:59.71
IV.IVPL.HHE. ML:1.9 0.00006695000000000001 0.44 AML other m 2018-06-21T21:01:00.26
IV.ILLI.HHN. ML:2.4 0.000179 0.5 AML other m 2018-06-21T21:01:06.62
IV.GALF.HNE. ML:1.7 0.00012017755 0.9472 AML other m 2018-06-21T21:00:40.04
IV.AGST.EHE. ML:2.1 0.00011249475000000001 0.0896 AML other m 2018-06-21T21:00:54.34
IV.AGST.EHN. ML:2.2 0.00013250085000000001 0.1152 AML other m 2018-06-21T21:00:54.54
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