Earthquake with magnitude of ML 0.4 on date 11-08-2018 and time 00:26:17 (Italy) in region 6 km NE Polizzi Generosa (PA)

A magnitude ML 0.4 earthquake occured in region: 6 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) 37.85, 14.05 at 20 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.

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 6 3407 3407
Petralia Sottana PA 6 2821 6228
Castellana Sicula PA 8 3411 9639
Petralia Soprana PA 8 3360 12999
Geraci Siculo PA 9 1945 14944
Castelbuono PA 10 8943 23887
Blufi PA 11 1029 24916
Isnello PA 11 1589 26505
Bompietro PA 12 1401 27906
Scillato PA 13 613 28519
Collesano PA 13 4054 32573
San Mauro Castelverde PA 14 1701 34274
Caltavuturo PA 14 4017 38291
Gratteri PA 15 963 39254
Gangi PA 15 6811 46065
Sclafani Bagni PA 17 426 46491
Pollina PA 18 2974 49465
Alimena PA 18 2032 51497
Resuttano CL 19 2038 53535
Lascari PA 19 3588 57123

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km N of Caltanissetta (63360 inhabitants)
54 Km SE of Bagheria (55387 inhabitants)
67 Km E of Palermo (674435 inhabitants)
73 Km NE of Agrigento (59770 inhabitants)
89 Km N of Gela (75827 inhabitants)
99 Km W 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
Rev 1000 ML 0.4 2018-08-10
22:26:17
37.85 14.05 20 2019-04-24
14:51:18
Bollettino Sismico Italiano INGV 67197681
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 ± 0.12
Latitude 37.85 ± 0.00
Longitude 14.05 ± 0.02
Depth (km) 20 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 67197681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1374
Semi-minor axis of confidence ellipse (meter) 158
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 89
Circular confidence region, given by single value of horizontal uncertainty (meter) 1370
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 185
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.07
Epicentral distance of station closest to the epicenter (degree) 0.05306
Epicentral distance of station farthest from the epicenter (degree) 0.20325
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitudes 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

ML:0.4

Field Value
Value 0.4
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 67197681
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-04-02 16:59:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RESU.HHZ. 2018-08-10T22:26:26.59 0.3 undecidable manual S 179 0.2032 123 0.01 74
IV.CSLB.HHZ. 2018-08-10T22:26:24.10 0.6 undecidable manual S 4 0.0872 149 -0.07 49
IV.PETRA.HHZ. 2018-08-10T22:26:23.78 0.3 undecidable manual S 108 0.0531 160 0.04 75
IV.RESU.HHZ. 2018-08-10T22:26:22.68 0.3 undecidable manual P 179 0.2032 123 -0.01 73
IV.PETRA.HHZ. 2018-08-10T22:26:21.00 0.1 undecidable manual P 108 0.0531 160 -0.05 100
IV.CSLB.HHZ. 2018-08-10T22:26:21.36 0.1 undecidable manual P 4 0.0872 149 0.06 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PETRA.HHE. ML:0.6 3.213572E-5 1.616 AML other m 2018-08-10T22:26:23.90
IV.CSLB.HHE. ML:0.1 8.376477E-6 1.296 AML other m 2018-08-10T22:26:25.69
IV.PETRA.HHN. ML:0.8 5.5111775E-5 0.384 AML other m 2018-08-10T22:26:25.48
IV.CSLB.HHN. ML:0.1 1.19335515E-5 0.3072 AML other m 2018-08-10T22:26:25.72
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