INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 0.6 on date 11-08-2018 and time 00:26:17 (Italy) in region 5 km NE Polizzi Generosa (PA)

A magnitude ML 0.6 earthquake occured in region: 5 km NE Polizzi Generosa (PA), on

  • 10-08-2018 22:26:17 (UTC)
  • 11-08-2018 00:26:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.86, 14.03 at 18 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
Polizzi Generosa PA 5 3407 3407
Petralia Sottana PA 8 2821 6228
Castellana Sicula PA 8 3411 9639
Petralia Soprana PA 9 3360 12999
Castelbuono PA 10 8943 21942
Isnello PA 10 1589 23531
Geraci Siculo PA 11 1945 25476
Scillato PA 11 613 26089
Collesano PA 11 4054 30143
Blufi PA 12 1029 31172
Caltavuturo PA 13 4017 35189
Bompietro PA 13 1401 36590
Gratteri PA 14 963 37553
San Mauro Castelverde PA 15 1701 39254
Sclafani Bagni PA 16 426 39680
Gangi PA 17 6811 46491
Lascari PA 18 3588 50079
Pollina PA 19 2974 53053
Alimena PA 19 2032 55085
Resuttano CL 19 2038 57123
Cerda PA 20 5330 62453
Campofelice di Roccella PA 20 7537 69990

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km N of Caltanissetta (63360 inhabitants)
52 Km SE of Bagheria (55387 inhabitants)
66 Km E of Palermo (674435 inhabitants)
72 Km NE of Agrigento (59770 inhabitants)
90 Km N of Gela (75827 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 0.6 2018-08-10
22:26:17
37.86 14.03 18 2018-08-10
22:34:16
Sala Sismica INGV-Roma 59609211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-10 22:26:17 ± 0.28
Latitude 37.86 ± 0.01
Longitude 14.03 ± 0.03
Depth (km) 18 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 59609211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2018
Semi-minor axis of confidence ellipse (meter) 929
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 92
Circular confidence region, given by single value of horizontal uncertainty (meter) 2020
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 199
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.44606
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 4
Magnitude information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 59609211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-10 22:34:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GALF.HHZ. 2018-08-10T22:26:27.27 1.0 undecidable manual P 109 0.4461 100 0.39 22
IV.RESU.HHZ. 2018-08-10T22:26:26.97 0.3 undecidable manual S 175 0.2095 117 0.11 72
MN.CLTB.HHZ. 2018-08-10T22:26:26.22 3.0 negative manual P -0.05 0
IV.CSLB.HHZ. 2018-08-10T22:26:24.35 0.6 undecidable manual S 14 0.0845 147 0.32 48
IV.PETRA.HHZ. 2018-08-10T22:26:23.78 0.3 undecidable manual S 109 0.0683 152 -0.02 76
IV.RESU.HHZ. 2018-08-10T22:26:22.91 0.3 undecidable manual P 175 0.2095 117 -0.1 73
IV.PETRA.HHZ. 2018-08-10T22:26:21.00 0.1 undecidable manual P 109 0.0683 152 -0.24 97
IV.CSLB.HHZ. 2018-08-10T22:26:21.36 0.1 undecidable manual P 14 0.0845 147 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PETRA.HHN. ML:0.8 5.5111775E-5 0.384 AML other m 2018-08-10T22:26:25.48
IV.PETRA.HHE. ML:0.5 3.213572E-5 0.384 AML other m 2018-08-10T22:26:23.90
IV.CSLB.HHN. ML:0.1 1.19335515E-5 0.3072 AML other m 2018-08-10T22:26:25.72
IV.CSLB.HHE. ML:0.1 8.376477E-6 0.704 AML other m 2018-08-10T22:26:24.69
IV.RESU.HHE. ML:0.3 9.5680983E-6 0.32 AML other m 2018-08-10T22:26:27.23
IV.RESU.HHN. ML:0.7 2.643114E-5 0.4608 AML other m 2018-08-10T22:26:29.25
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