Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 18-08-2019 and time 15:57:14 (Italy) in region Golfo di Gela (Caltanissetta)

A magnitude ML 1.3 earthquake occured in region: Golfo di Gela (Caltanissetta), on

  • 18-08-2019 13:57:14 (UTC)
  • 18-08-2019 15:57:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 36.9860, 14.2820 at 34 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
Gela CL 9 75827 75827
Acate RG 19 10954 86781

Municipalities with at least 50000 inhabitants

An earthquake occurred to
9 Km S of Gela (75827 inhabitants)
23 Km W of Vittoria (63339 inhabitants)
41 Km W of Ragusa (73313 inhabitants)
45 Km W of Modica (54633 inhabitants)
60 Km SE of Caltanissetta (63360 inhabitants)
72 Km SE of Agrigento (59770 inhabitants)
90 Km W of Siracusa (122291 inhabitants)
92 Km SW of Catania (314555 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 1.3 2019-08-18
13:57:14		 36.9862 14.2818 34 2019-11-13
14:30:58		 Bollettino Sismico Italiano INGV 71620621
Reviewed
Rev100 		ML 1.3 2019-08-18
13:57:15		 36.9705 14.2863 23 2019-08-18
14:06:06		 Sala Sismica INGV-Roma 71606321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-18 13:57:14 ± 0.26
Latitude 36.9862 ± 0.0117
Longitude 14.2818 ± 0.0101
Depth (km) 34 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 71620621

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1042
Semi-minor axis of confidence ellipse (meter) 829
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 26
Circular confidence region, given by single value of horizontal uncertainty (meter) 1040.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 173
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0.07464
Epicentral distance of station farthest from the epicenter (degree) 0.59355
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.5
Num. used stations 12
Type of magnitude ML
Reference to an origin 71606321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-18 14:06:06

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 71620621
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-09-27 14:42:47
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HLNI.HHZ. 2019-08-18T13:57:36.05 0.6 undecidable manual S 52 65.8896 113 0.08 47
IV.FAVR.HHE. 2019-08-18T13:57:34.98 0.6 undecidable manual S 300 62.6928 114 -0.21 47
IV.HVZN.HHE. 2019-08-18T13:57:31.45 0.6 undecidable manual S 61 43.9227 124 0.66 43
IV.FAVR.HHE. 2019-08-18T13:57:27.20 0.3 undecidable manual P 300 62.6928 114 0.68 59
IV.CROCE.HHZ. 2019-08-18T13:57:27.74 0.6 undecidable manual S 127 28.1496 137 0.17 49
IV.ACATE.EHE. 2019-08-18T13:57:26.19 0.6 undecidable manual S 78 19.869 147 -0.02 51
IV.HLNI.HHZ. 2019-08-18T13:57:26.73 0.1 undecidable manual P 52 65.8896 113 -0.24 90
IT.GEA.HGE. 2019-08-18T13:57:25.02 0.3 undecidable manual S 21 8.2806 165 0.06 78
IV.HVZN.HHE. 2019-08-18T13:57:24.12 0.3 undecidable manual P 61 43.9227 124 0.14 73
IV.CLTA.HHZ. 2019-08-18T13:57:22.73 0.3 undecidable manual P 304 34.1436 131 -0.05 76
IV.CROCE.HHZ. 2019-08-18T13:57:22.09 0.3 undecidable manual P 127 28.1496 137 -0.03 76
IV.ACATE.EHE. 2019-08-18T13:57:21.26 0.3 undecidable manual P 78 19.869 147 -0.07 76
IV.RAFF.HHZ. 2019-08-18T13:57:21.91 0.1 positive manual P 15 27.1506 138 -0.11 100
IT.GEA.HGE. 2019-08-18T13:57:20.03 0.3 undecidable manual P 21 8.2806 165 -0.58 69
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RAFF.HHN. ML:1.3 0.000072217775 0.0832 AML other m 2019-08-18T13:57:22.02
IV.CROCE.HHN. ML:1.3 0.00006247457 0.1024 AML other m 2019-08-18T13:57:28.02
IV.CROCE.HNN. ML:1.5 0.00009629045 0.1088 AML other m 2019-08-18T13:57:28.07
IV.CROCE.HHE. ML:1.0 0.00003277497 0.16 AML other m 2019-08-18T13:57:28.32
IV.RAFF.HHE. ML:1.4 0.000072663585 0.2368 AML other m 2019-08-18T13:57:28.25
IV.CLTA.HHN. ML:0.7 0.0000150101205 0.3008 AML other m 2019-08-18T13:57:30.10
IV.CLTA.HHE. ML:0.7 0.000012977651 0.224 AML other m 2019-08-18T13:57:30.62
IV.CROCE.HNE. ML:1.6 0.000128711325 0.672 AML other m 2019-08-18T13:57:32.55
IV.HLNI.HHN. ML:1.4 0.00003647132 0.1216 AML other m 2019-08-18T13:57:36.34
IV.HLNI.HHE. ML:1.2 0.000026638995 0.096 AML other m 2019-08-18T13:57:36.62
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