INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.3 on date 12-08-2018 and time 09:45:49 (Italy) in region 2 km N Polizzi Generosa (PA)

A magnitude ML 1.3 earthquake occured in region: 2 km N Polizzi Generosa (PA), on

  • 12-08-2018 07:45:49 (UTC)
  • 12-08-2018 09:45:49 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.83, 14 at 5 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 2 3407 3407
Castellana Sicula PA 7 3411 6818
Scillato PA 8 613 7431
Petralia Sottana PA 9 2821 10252
Caltavuturo PA 9 4017 14269
Petralia Soprana PA 11 3360 17629
Blufi PA 11 1029 18658
Collesano PA 12 4054 22712
Sclafani Bagni PA 12 426 23138
Bompietro PA 13 1401 24539
Isnello PA 13 1589 26128
Geraci Siculo PA 15 1945 28073
Castelbuono PA 15 8943 37016
Gratteri PA 16 963 37979
Resuttano CL 17 2038 40017
Valledolmo PA 17 3594 43611
Cerda PA 18 5330 48941
Alimena PA 18 2032 50973
Gangi PA 19 6811 57784
Aliminusa PA 19 1236 59020
San Mauro Castelverde PA 20 1701 60721
Lascari PA 20 3588 64309

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km N of Caltanissetta (63360 inhabitants)
51 Km SE of Bagheria (55387 inhabitants)
64 Km SE of Palermo (674435 inhabitants)
68 Km NE of Agrigento (59770 inhabitants)
88 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 1.3 2018-08-12
07:45:49
37.83 14 5 2018-08-12
07:51:16
Sala Sismica INGV-Roma 59663211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-12 07:45:49 ± 0.25
Latitude 37.83 ± 0.02
Longitude 14.00 ± 0.02
Depth (km) 5 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 59663211

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1776
Semi-minor axis of confidence ellipse (meter) 1175
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 133
Circular confidence region, given by single value of horizontal uncertainty (meter) 1780
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 136
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.55
Epicentral distance of station closest to the epicenter (degree) 0.09443
Epicentral distance of station farthest from the epicenter (degree) 0.56118
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 59663211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-12 07:51:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MNO.SHZ. 2018-08-12T07:46:01.04 0.1 undecidable manual P 79 0.5612 50 0.13 89
IV.MCT.BHZ. 2018-08-12T07:45:58.29 0.1 undecidable manual P 236 0.3705 97 0.84 75
IV.ALJA.HHZ. 2018-08-12T07:45:57.45 0.6 undecidable manual S 248 0.2059 103 0.16 48
IV.CSLB.HHZ. 2018-08-12T07:45:54.63 0.1 undecidable manual S 24 0.1205 111 0.5 90
IV.RESU.HHZ. 2018-08-12T07:45:53.43 0.1 undecidable manual P 165 0.1871 104 0.01 99
IV.PLLN.EHZ. 2018-08-12T07:45:53.31 0.1 undecidable manual P 35 0.2023 103 -0.45 90
IV.ALJA.HHZ. 2018-08-12T07:45:53.02 0.1 undecidable manual P 248 0.2059 103 -0.82 78
IV.PETRA.HHZ. 2018-08-12T07:45:51.47 0.1 positive manual P 86 0.0944 117 -0.02 100
IV.CSLB.HHZ. 2018-08-12T07:45:51.79 0.1 positive manual P 24 0.1205 111 -0.23 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PETRA.HHN. ML:1.5 0.000463 0.36 AML other m 2018-08-12T07:45:55.94
IV.CSLB.HHN. ML:1 0.000121 1.4 AML other m 2018-08-12T07:45:56.16
IV.PETRA.HHE. ML:1.5 0.0005015 0.68 AML other m 2018-08-12T07:45:56.88
IV.CSLB.HHE. ML:0.9 9.48E-5 0.56 AML other m 2018-08-12T07:45:57.25
IV.RESU.HHN. ML:1.3 0.0001545 0.38 AML other m 2018-08-12T07:46:00.29
IV.ALJA.HHN. ML:1.5 0.0002305 1.64 AML other m 2018-08-12T07:46:00.00
IV.ALJA.HHE. ML:1.4 0.000176 0.2 AML other m 2018-08-12T07:46:01.45
IV.RESU.HHE. ML:1.2 0.000134 0.32 AML other m 2018-08-12T07:46:01.71
IV.PLLN.EHE. ML:1.4 0.0001725 1.4 AML other m 2018-08-12T07:46:01.07
IV.PLLN.EHN. ML:1.4 0.00016 1.44 AML other m 2018-08-12T07:46:01.07
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