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

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

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

and geographic coordinates (lat, lon) 36.97, 14.29 at 23 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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.

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 11 75827 75827
Acate RG 20 10954 86781

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km S of Gela (75827 inhabitants)
23 Km W of Vittoria (63339 inhabitants)
40 Km W of Ragusa (73313 inhabitants)
44 Km W of Modica (54633 inhabitants)
61 Km SE of Caltanissetta (63360 inhabitants)
73 Km SE of Agrigento (59770 inhabitants)
90 Km W of Siracusa (122291 inhabitants)
93 Km SW of Catania (314555 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.3 2019-08-18
13:57:15
36.97 14.29 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 13:57:15 ± 0.32
Latitude 36.97 ± 0.02
Longitude 14.29 ± 0.02
Depth (km) 23 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71606321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2318
Semi-minor axis of confidence ellipse (meter) 1064
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 37
Circular confidence region, given by single value of horizontal uncertainty (meter) 2320
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 176
Number of associated phases, regardless of their use for origin computation 20
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
Epicentral distance of station farthest from the epicenter (degree) 1.56482
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 9
Magnitude 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
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ARVD.HHZ. 2019-08-18T13:59:08.01 3.0 positive manual Pg 15.36 0
MN.TIP.HHZ. 2019-08-18T13:58:47.18 3.0 undecidable manual Sg 9.38 0
IV.VIVA.HHZ. 2019-08-18T13:58:42.48 3.0 positive manual Pg 12.9 0
IV.POFI.HHZ. 2019-08-18T13:58:36.94 3.0 undecidable manual Pg 9.58 0
IV.PTRJ.HHZ. 2019-08-18T13:58:35.01 3.0 undecidable manual Pg 12.82 0
IV.LAV9.HNZ. 2019-08-18T13:58:25.38 3.0 positive manual Pn -3.44 0
IV.PAOL.HHZ. 2019-08-18T13:58:23.56 3.0 negative manual Pg 5.91 0
IV.PTRP.HHZ. 2019-08-18T13:58:20.77 3.0 undecidable manual Pg 6.82 0
IV.ILLI.HHZ. 2019-08-18T13:57:43.38 0.6 undecidable manual P 19 1.5648 54 0.73 29
IV.HLNI.HHZ. 2019-08-18T13:57:36.20 0.6 undecidable manual S 51 0.5998 102 0.12 46
IV.FAVR.HHE. 2019-08-18T13:57:27.31 0.6 undecidable manual P 301 0.5756 103 0.34 44
IV.CROCE.HHZ. 2019-08-18T13:57:26.84 0.6 undecidable manual S 125 0.2419 124 0.68 43
IV.HLNI.HHZ. 2019-08-18T13:57:26.75 0.3 positive manual P 51 0.5998 102 -0.63 59
IV.RAFF.HHZ. 2019-08-18T13:57:25.84 1.0 undecidable manual S 14 0.259 122 -0.76 20
IV.HVZN.HHE. 2019-08-18T13:57:24.12 0.6 undecidable manual P 59 0.4002 110 0.03 49
IV.CLTA.HHZ. 2019-08-18T13:57:22.73 0.3 undecidable manual P 306 0.3193 116 -0.08 73
IV.RAFF.HHZ. 2019-08-18T13:57:21.91 0.1 positive manual P 14 0.259 122 0 100
IV.ACATE.EHE. 2019-08-18T13:57:21.43 0.6 undecidable manual P 73 0.179 134 0.61 45
IT.GEA.HGE. 2019-08-18T13:57:20.03 0.3 undecidable manual P 15 0.0881 154 0.14 76
IV.CROCE.HHZ. 2019-08-18T13:57:20.78 0.3 undecidable manual P 125 0.2419 124 -0.87 57
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CROCE.HHE. ML:0.9 3.277497E-5 0.16 AML other m 2019-08-18T13:57:28.32
IV.CROCE.HHN. ML:1.2 6.247457E-5 0.1024 AML other m 2019-08-18T13:57:28.02
IV.CROCE.HNE. ML:1.5 0.000128711325 0.672 AML other m 2019-08-18T13:57:32.55
IV.CROCE.HNN. ML:1.4 9.629045E-5 0.1088 AML other m 2019-08-18T13:57:28.07
IV.RAFF.HHE. ML:1.3 7.2663585E-5 0.2368 AML other m 2019-08-18T13:57:28.25
IV.RAFF.HHN. ML:1.2 7.2217775E-5 0.0832 AML other m 2019-08-18T13:57:22.02
IV.CLTA.HHE. ML:0.6 1.2977651E-5 0.224 AML other m 2019-08-18T13:57:30.62
IV.CLTA.HHN. ML:0.6 1.50101205E-5 0.3008 AML other m 2019-08-18T13:57:30.10
IV.HLNI.HHE. ML:1.2 2.6638995E-5 0.096 AML other m 2019-08-18T13:57:36.62
IV.HLNI.HHN. ML:1.3 3.647132E-5 0.1216 AML other m 2019-08-18T13:57:36.34
IV.ILLI.HHE. ML:3.9 0.0030194035 0.0832 AML other m 2019-08-18T13:57:57.29
IV.ILLI.HHN. ML:3.7 0.002026306 0.5632 AML other m 2019-08-18T13:58:13.01
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download