Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.3 on date 16-12-2018 and time 00:16:23 (Italy) in region 4 km W Gangi (PA)

A magnitude ML 2.3 earthquake occured in region: 4 km W Gangi (PA), on

  • 15-12-2018 23:16:23 (UTC)
  • 16-12-2018 00:16:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.7960, 14.1640 at 11 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
Gangi PA 4 6811 6811
Petralia Soprana PA 5 3360 10171
Petralia Sottana PA 6 2821 12992
Geraci Siculo PA 7 1945 14937
Bompietro PA 8 1401 16338
Blufi PA 9 1029 17367
Castellana Sicula PA 11 3411 20778
Alimena PA 12 2032 22810
San Mauro Castelverde PA 14 1701 24511
Polizzi Generosa PA 15 3407 27918
Castel di Lucio ME 17 1294 29212
Castelbuono PA 17 8943 38155
Sperlinga EN 17 805 38960
Resuttano CL 17 2038 40998

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km N of Caltanissetta (63360 inhabitants)
65 Km SE of Bagheria (55387 inhabitants)
74 Km NE of Agrigento (59770 inhabitants)
79 Km E of Palermo (674435 inhabitants)
82 Km N of Gela (75827 inhabitants)
88 Km W of Catania (314555 inhabitants)
91 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 2.3 2018-12-15
23:16:23		 37.7958 14.1637 11 2019-06-04
09:16:03		 Bollettino Sismico Italiano INGV 63983171
Reviewed
Rev100 		ML 2.4 2018-12-15
23:16:23		 37.7967 14.2065 6 2018-12-15
23:22:02		 Sala Sismica INGV-Roma 63932941
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-15 23:16:23 ± 0.15
Latitude 37.7958 ± 0.0090
Longitude 14.1637 ± 0.0148
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 63983171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1221
Semi-minor axis of confidence ellipse (meter) 946
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 263
Circular confidence region, given by single value of horizontal uncertainty (meter) 1220.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 55
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.44
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.86155
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 15
Magnitudes information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 63932941
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-15 23:22:02

ML:2.3

Field Value
Value 2.3
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 63983171
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-12-18 13:15:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SPS2.HHZ. 2018-12-15T23:17:05.12 3.0 negative manual Pg 4.21 0
IV.AIO.HHZ. 2018-12-15T23:16:40.13 0.3 undecidable manual P 78 95.6376 50 0.23 66
IV.MPG.SHZ. 2018-12-15T23:16:38.40 0.3 undecidable manual P 300 81.1521 50 0.73 59
IV.IACL.HHZ. 2018-12-15T23:16:38.56 0.3 undecidable manual P 11 83.4498 50 0.53 63
MN.CLTB.HHZ. 2018-12-15T23:16:37.88 0.1 undecidable manual P 254 86.6466 50 -0.63 81
IV.CORL.HHZ. 2018-12-15T23:16:37.53 0.6 undecidable manual P 279 76.0683 50 0.63 41
IV.MUCR.HHZ. 2018-12-15T23:16:35.17 0.1 undecidable manual P 66 67.8765 50 -0.46 89
IV.SOLUN.HHZ. 2018-12-15T23:16:34.69 0.3 undecidable manual P 301 64.2912 50 -0.38 68
MN.VAE.HHZ. 2018-12-15T23:16:32.21 1.0 undecidable manual P 155 39.9267 50 0.89 20
IV.PLLN.EHZ. 2018-12-15T23:16:32.39 0.3 undecidable manual S 355 21.867 50 0.3 75
IV.RESU.HHZ. 2018-12-15T23:16:31.76 0.3 undecidable manual S 210 18.9699 119 0.5 72
IV.CSLB.HHZ. 2018-12-15T23:16:31.52 0.3 undecidable manual S 329 18.2706 120 0.5 72
IV.CAGR.HHE. 2018-12-15T23:16:31.09 0.3 undecidable manual P 123 35.2425 50 0.5 70
IV.ALJA.HHZ. 2018-12-15T23:16:30.84 0.3 undecidable manual P 262 36.3414 50 0.08 76
IV.GALF.HHZ. 2018-12-15T23:16:30.80 0.3 undecidable manual P 105 36.5412 50 -0.01 78
IV.PETRA.HHZ. 2018-12-15T23:16:28.46 0.3 undecidable manual S 314 5.994 151 0.52 73
IV.PLLN.EHZ. 2018-12-15T23:16:28.04 0.1 undecidable manual P 355 21.867 50 -0.5 95
IV.CSLB.HHZ. 2018-12-15T23:16:27.30 0.1 undecidable manual P 329 18.2706 120 -0.63 91
IV.RESU.HHZ. 2018-12-15T23:16:27.59 0.1 undecidable manual P 210 18.9699 119 -0.47 97
IV.PETRA.HHZ. 2018-12-15T23:16:25.73 0.1 undecidable manual P 314 5.994 151 -0.42 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.CLTB.HHN. ML:2.7 0.0006625 1.36 AML other m 2018-12-15T23:17:09.78
IV.PETRA.HHN. ML:2.6 0.006125 0.42 AML other m 2018-12-15T23:16:28.58
IV.CSLB.HHE. ML:2.0 0.0008115 0.92 AML other m 2018-12-15T23:16:32.64
IV.RESU.HHE. ML:2.4 0.002 0.42 AML other m 2018-12-15T23:16:32.48
IV.PLLN.EHE. ML:2.2 0.0014849999999999998 0.38 AML other m 2018-12-15T23:16:36.63
IV.PLLN.EHN. ML:2.1 0.001321 0.44 AML other m 2018-12-15T23:16:37.55
IV.GALF.HNE. ML:1.8 0.000219 0.46 AML other m 2018-12-15T23:16:40.12
IV.GALF.HHE. ML:2.8 0.0022800000000000003 0.38 AML other m 2018-12-15T23:16:41.76
IV.GALF.HNN. ML:1.9 0.0003115 0.38 AML other m 2018-12-15T23:16:41.78
IV.GALF.HHN. ML:2.8 0.00233 0.38 AML other m 2018-12-15T23:16:41.78
IV.ALJA.HHE. ML:2.3 0.000811 1.48 AML other m 2018-12-15T23:16:42.22
IV.ALJA.HHN. ML:2.4 0.0009260000000000001 1.04 AML other m 2018-12-15T23:16:47.05
IV.MUCR.HHN. ML:2.3 0.00033899999999999995 0.68 AML other m 2018-12-15T23:16:51.73
IV.MUCR.HHE. ML:2.4 0.000399 0.66 AML other m 2018-12-15T23:16:51.75
IV.AIO.HHE. ML:2.2 0.0001675 0.52 AML other m 2018-12-15T23:16:57.47
IV.AIO.HHN. ML:2.4 0.000253 0.42 AML other m 2018-12-15T23:17:02.33
MN.CLTB.HHE. ML:2.4 0.0003085 0.56 AML other m 2018-12-15T23:17:09.47
IV.CSLB.HHN. ML:1.8 0.0005942642 0.1792 AML other m 2018-12-15T23:16:32.31
IV.RESU.HHN. ML:2.4 0.0017577411 0.384 AML other m 2018-12-15T23:16:32.35
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