Earthquake (quarry blast) with magnitude of ML 1.0 on date 23-08-2019 and time 11:11:57 (Italy) in region 3 km W Sellano (PG)

A magnitude ML 1.0 (quarry blast) earthquake occured in region: 3 km W Sellano (PG), on

  • 23-08-2019 09:11:57 (UTC)
  • 23-08-2019 11:11:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.89, 12.89 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: quarry blast.

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
Sellano PG 3 1079 1079
Cerreto di Spoleto PG 8 1075 2154
Preci PG 12 724 2878
Trevi PG 12 8469 11347
Campello sul Clitunno PG 12 2442 13789
Vallo di Nera PG 14 364 14153
Monte Cavallo MC 14 145 14298
Visso MC 17 1107 15405
Foligno PG 17 57155 72560
Sant'Anatolia di Narco PG 18 564 73124
Castel Ritaldi PG 20 3278 76402
Montefalco PG 20 5679 82081
Norcia PG 20 4957 87038

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km E of Foligno (57155 inhabitants)
42 Km NE of Terni (111501 inhabitants)
48 Km SE of Perugia (166134 inhabitants)
71 Km W of Teramo (54892 inhabitants)
73 Km NW of L'Aquila (69753 inhabitants)
83 Km NE of Viterbo (67173 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
100 Km N of Guidonia Montecelio (88673 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 1.0 2019-08-23
09:11:57
42.89 12.89 1 2019-11-13
14:31:07
Bollettino Sismico Italiano INGV 73383141
Rev 100 ML 1.2 2019-08-23
09:11:56
42.86 12.91 8 2019-08-23
09:16:13
Sala Sismica INGV-Roma 71733671
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-23 09:11:57 ± 0.19
Latitude 42.89 ± 0.01
Longitude 12.89 ± 0.02
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 73383141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1440
Semi-minor axis of confidence ellipse (meter) 1120
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 296
Circular confidence region, given by single value of horizontal uncertainty (meter) 1440
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 75
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.45
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.46135
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 73383141
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-10-22 00:52:39

ML:1.2

Field Value
Value 1.2
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 71733671
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-23 09:16:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MCIV.CHZ. 2019-08-23T09:12:26.24 3.0 undecidable manual S -0.58 0
IV.EL6.EHZ. 2019-08-23T09:12:06.44 0.3 undecidable manual P 19 0.4614 91 -1 54
IV.LNSS.HNZ. 2019-08-23T09:12:04.31 0.1 undecidable manual P 160 0.3094 91 0.24 96
IV.CSP1.EHZ. 2019-08-23T09:12:03.42 0.1 undecidable manual P 49 0.3013 91 -0.47 92
IV.MOMA.HNZ. 2019-08-23T09:12:03.23 0.3 undecidable manual P 249 0.2536 91 0.41 71
IV.ASSB.HHZ. 2019-08-23T09:12:02.21 0.3 undecidable manual P 311 0.2275 91 -0.03 77
IV.MC2.EHZ. 2019-08-23T09:12:02.46 0.3 undecidable manual P 85 0.2167 91 0.46 70
IV.FDMO.HHZ. 2019-08-23T09:12:01.74 0.3 undecidable manual P 45 0.2014 91 0.09 76
IT.MTCL.HGZ. 2019-08-23T09:12:00.24 0.3 undecidable manual P 37 0.1268 92 0.24 75
IV.GAVE.EHZ. 2019-08-23T09:12:00.69 0.3 undecidable manual P 180 0.2014 91 -0.96 58
IV.FEMA.HNE. 2019-08-23T09:12:00.41 0.3 undecidable manual P 59 0.1331 92 0.27 74
IV.CESI.HHZ. 2019-08-23T09:11:59.92 0.1 undecidable manual P 4 0.1115 92 0.26 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.5 0.0004955 0.38 AML other m 2019-08-23T09:12:03.22
IV.CESI.HHE. ML:1.4 0.000338 0.26 AML other m 2019-08-23T09:12:03.73
IV.FDMO.HHN. ML:0.7 4.15E-5 0.48 AML other m 2019-08-23T09:12:07.87
IV.ASSB.HHN. ML:0.9 5.41E-5 0.44 AML other m 2019-08-23T09:12:08.32
IV.GAVE.EHE. ML:1 8.105E-5 1.34 AML other m 2019-08-23T09:12:08.86
IV.FDMO.HHE. ML:0.8 4.75E-5 0.26 AML other m 2019-08-23T09:12:09.53
IV.GAVE.EHN. ML:1.1 9.81E-5 0.4 AML other m 2019-08-23T09:12:10.08
IV.ASSB.HHE. ML:0.8 4.515E-5 0.58 AML other m 2019-08-23T09:12:11.00
IV.MCIV.CHE. ML:1.8 6.415E-5 0.34 AML other m 2019-08-23T09:12:27.53
IV.MCIV.CHN. ML:1.9 8.19E-5 0.34 AML other m 2019-08-23T09:12:29.57
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