Earthquake with magnitude of ML 1.1 on date 21-08-2019 and time 08:16:04 (Italy) in region 7 km W Sellano (PG)

A magnitude ML 1.1 earthquake occured in region: 7 km W Sellano (PG), on

  • 21-08-2019 06:16:04 (UTC)
  • 21-08-2019 08:16:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.86, 12.85 at 11 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
Sellano PG 7 1079 1079
Cerreto di Spoleto PG 7 1075 2154
Campello sul Clitunno PG 8 2442 4596
Trevi PG 9 8469 13065
Vallo di Nera PG 10 364 13429
Sant'Anatolia di Narco PG 15 564 13993
Castel Ritaldi PG 15 3278 17271
Preci PG 15 724 17995
Foligno PG 16 57155 75150
Montefalco PG 17 5679 80829
Scheggino PG 17 461 81290
Spoleto PG 17 38218 119508
Poggiodomo PG 18 117 119625
Monte Cavallo MC 19 145 119770

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km SE of Foligno (57155 inhabitants)
38 Km NE of Terni (111501 inhabitants)
46 Km SE of Perugia (166134 inhabitants)
72 Km NW of L'Aquila (69753 inhabitants)
73 Km W of Teramo (54892 inhabitants)
79 Km NE of Viterbo (67173 inhabitants)
97 Km N of Guidonia Montecelio (88673 inhabitants)
100 Km SW of Ancona (100861 inhabitants)
100 Km N of Tivoli (56533 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 1.1 2019-08-21
06:16:04
42.86 12.85 11 2019-08-21
06:20:42
Sala Sismica INGV-Roma 71670461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-21 06:16:04 ± 0.07
Latitude 42.86 ± 0.00
Longitude 12.85 ± 0.00
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 71670461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 280
Semi-minor axis of confidence ellipse (meter) 145
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) 280
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 84
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.14659
Epicentral distance of station farthest from the epicenter (degree) 0.50002
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 71670461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-08-21 06:20:42
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SNTG.HHZ. 2019-08-21T06:16:19.16 0.3 undecidable manual S 9 0.3966 90 0.28 68
IV.CSP1.EHZ. 2019-08-21T06:16:17.61 0.1 undecidable manual S 48 0.3444 90 0.26 92
IV.LNSS.HHZ. 2019-08-21T06:16:15.86 0.1 undecidable manual S 152 0.295 90 -0.03 97
IV.FDMO.HHZ. 2019-08-21T06:16:14.08 0.1 undecidable manual S 45 0.2437 90 -0.29 93
IV.EL6.EHZ. 2019-08-21T06:16:14.81 0.1 undecidable manual P 21 0.5 90 0.16 90
IV.MURB.HHZ. 2019-08-21T06:16:14.24 1.0 negative manual P 329 0.4649 90 0.18 23
IV.MOMA.HHZ. 2019-08-21T06:16:13.59 0.1 undecidable manual S 254 0.2149 90 0.08 98
IV.ASSB.HHZ. 2019-08-21T06:16:13.67 0.1 undecidable manual S 322 0.2275 90 -0.22 93
IV.CSP1.EHZ. 2019-08-21T06:16:12.00 0.1 undecidable manual P 48 0.3444 90 0 96
IV.GAVE.EHZ. 2019-08-21T06:16:12.23 0.1 undecidable manual S 170 0.1745 90 -0.07 99
IV.SNTG.HHZ. 2019-08-21T06:16:12.90 0.6 positive manual P 9 0.3966 90 0.02 48
IV.NRCA.HHZ. 2019-08-21T06:16:12.89 0.1 undecidable manual S 99 0.1952 90 -0.02 99
IV.CESI.HHZ. 2019-08-21T06:16:11.45 0.1 undecidable manual S 15 0.1466 90 -0.03 100
IV.LNSS.HHZ. 2019-08-21T06:16:11.11 0.1 undecidable manual P 152 0.295 90 -0.04 97
IV.FDMO.HHZ. 2019-08-21T06:16:10.20 0.1 undecidable manual P 45 0.2437 90 -0.08 97
IV.ASSB.HHZ. 2019-08-21T06:16:09.75 0.1 undecidable manual P 322 0.2275 90 -0.25 94
IV.MOMA.HHZ. 2019-08-21T06:16:09.92 0.1 undecidable manual P 254 0.2149 90 0.14 96
IV.GAVE.EHZ. 2019-08-21T06:16:09.13 0.1 positive manual P 170 0.1745 90 0.05 98
IV.NRCA.HHZ. 2019-08-21T06:16:09.40 0.1 undecidable manual P 99 0.1952 90 -0.03 99
IV.CESI.HHZ. 2019-08-21T06:16:08.69 0.1 positive manual P 15 0.1466 90 0.09 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CESI.HHN. ML:1.6 0.0003605 0.22 AML other m 2019-08-21T06:16:11.82
IV.CESI.HHE. ML:1.3 0.0001565 0.48 AML other m 2019-08-21T06:16:11.67
IV.GAVE.EHN. ML:1.5 0.000224 0.56 AML other m 2019-08-21T06:16:12.55
IV.NRCA.HHN. ML:1 6.405E-5 0.78 AML other m 2019-08-21T06:16:13.18
IV.GAVE.EHE. ML:1.7 0.000339 0.76 AML other m 2019-08-21T06:16:13.47
IV.NRCA.HHE. ML:1 7.63E-5 0.08 AML other m 2019-08-21T06:16:13.93
IV.MOMA.HHE. ML:1 5.545E-5 0.98 AML other m 2019-08-21T06:16:14.77
IV.MOMA.HHN. ML:0.8 3.49E-5 0.22 AML other m 2019-08-21T06:16:14.63
IV.ASSB.HHE. ML:0.9 5.015E-5 0.32 AML other m 2019-08-21T06:16:14.63
IV.FDMO.HHE. ML:0.9 4.12E-5 1.22 AML other m 2019-08-21T06:16:14.18
IV.ASSB.HHN. ML:1 5.92E-5 1.24 AML other m 2019-08-21T06:16:14.98
IV.FDMO.HHN. ML:0.9 4.14E-5 0.12 AML other m 2019-08-21T06:16:15.37
IV.LNSS.HHE. ML:1.1 5.53E-5 0.12 AML other m 2019-08-21T06:16:16.91
IV.LNSS.HHN. ML:1.1 4.805E-5 0.86 AML other m 2019-08-21T06:16:17.48
IV.MURB.HHE. ML:1.4 7.025E-5 0.34 AML other m 2019-08-21T06:16:23.60
IV.MURB.HHN. ML:1.3 4.265E-5 0.42 AML other m 2019-08-21T06:16:24.58
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