Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 13-09-2019 and time 20:09:46 (Italy) in region 4 km N Proceno (VT)

A magnitude ML 1.2 earthquake occured in region: 4 km N Proceno (VT), on

  • 13-09-2019 18:09:46 (UTC)
  • 13-09-2019 20:09:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.7960, 11.8200 at 8 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Proceno VT 4 557 557
Acquapendente VT 7 5506 6063
San Casciano dei Bagni SI 10 1632 7695
Castell'Azzara GR 10 1476 9171
Onano VT 11 995 10166
Piancastagnaio SI 12 4230 14396
Radicofani SI 12 1097 15493
Allerona TR 13 1794 17287
Grotte di Castro VT 14 2683 19970
San Lorenzo Nuovo VT 14 2091 22061
Abbadia San Salvatore SI 15 6444 28505
Sorano GR 15 3428 31933
Castel Viscardo TR 16 2938 34871
Castel Giorgio TR 16 2131 37002
Gradoli VT 17 1353 38355
Fabro TR 18 2876 41231
Latera VT 19 836 42067
Santa Fiora GR 20 2622 44689
Cetona SI 20 2755 47444

Municipalities with at least 50000 inhabitants

An earthquake occurred to
48 Km NW of Viterbo (67173 inhabitants)
58 Km E of Grosseto (82087 inhabitants)
58 Km SW of Perugia (166134 inhabitants)
70 Km SE of Siena (53903 inhabitants)
73 Km W of Terni (111501 inhabitants)
74 Km W of Foligno (57155 inhabitants)
75 Km S of Arezzo (99543 inhabitants)
78 Km N of Civitavecchia (52991 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
Bulletin
Rev1000 		ML 1.2 2019-09-13
18:09:46		 42.7962 11.8203 8 2020-02-28
16:42:10		 Bollettino Sismico Italiano INGV 74275391
Reviewed
Rev100 		ML 1.2 2019-09-13
18:09:46		 42.8053 11.8212 8 2019-09-13
18:20:02		 Sala Sismica INGV-Roma 72372461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-09-13 18:09:46 ± 0.16
Latitude 42.7962 ± 0.0054
Longitude 11.8203 ± 0.0049
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 74275391

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 577
Semi-minor axis of confidence ellipse (meter) 173
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 170
Circular confidence region, given by single value of horizontal uncertainty (meter) 580.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.08454
Epicentral distance of station farthest from the epicenter (degree) 0.25900
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.1
Num. used stations 12
Type of magnitude ML
Reference to an origin 74275391
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-12-03 10:31:34

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 72372461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-09-13 18:20:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ARCI.HHZ. 2019-09-13T18:09:56.14 0.6 undecidable manual S 283 28.749 105 -0.23 46
IV.MGAB.HHZ. 2019-09-13T18:09:55.77 0.6 undecidable manual S 61 27.0507 106 -0.02 48
TV.SF01.EHZ. 2019-09-13T18:09:53.71 0.6 undecidable manual S 275 20.9679 110 -0.09 48
IV.LATE.HHZ. 2019-09-13T18:09:53.42 0.6 undecidable manual S 184 20.2686 111 -0.14 48
IV.ARCI.HHZ. 2019-09-13T18:09:52.02 0.3 undecidable manual P 283 28.749 105 0.01 73
TV.SF14.HHE. 2019-09-13T18:09:52.01 0.3 undecidable manual S 255 17.3715 114 -0.62 64
TV.SF13.HHE. 2019-09-13T18:09:52.37 0.6 undecidable manual S 279 16.5723 115 0 50
TV.SF04.EHZ. 2019-09-13T18:09:51.68 0.6 undecidable manual S 289 13.7751 119 0.17 48
IV.MGAB.HHZ. 2019-09-13T18:09:51.33 0.1 undecidable manual P 61 27.0507 106 -0.35 91
TV.SF11.HHE. 2019-09-13T18:09:51.30 0.3 undecidable manual S 305 14.0748 119 -0.3 70
IV.SACS.HHZ. 2019-09-13T18:09:50.34 0.6 undecidable manual S 51 9.3795 129 0.1 49
IV.LATE.HHZ. 2019-09-13T18:09:50.61 0.3 undecidable manual P 184 20.2686 111 0.22 71
TV.SF03.EHE. 2019-09-13T18:09:50.89 0.6 undecidable manual S 274 10.9779 125 0.19 48
TV.SF01.EHZ. 2019-09-13T18:09:50.78 0.1 undecidable manual P 275 20.9679 110 0.26 93
IV.MCIV.CHZ. 2019-09-13T18:09:50.91 0.6 undecidable manual S 261 11.877 123 -0.04 50
TV.SF13.HHE. 2019-09-13T18:09:49.79 0.1 negative manual P 279 16.5723 115 0.09 97
IV.MCIV.CHZ. 2019-09-13T18:09:49.09 0.1 undecidable manual P 261 11.877 123 0.21 96
TV.SF11.HHE. 2019-09-13T18:09:49.17 0.1 undecidable manual P 305 14.0748 119 -0.08 98
TV.SF14.HHE. 2019-09-13T18:09:49.52 0.1 undecidable manual P 255 17.3715 114 -0.33 92
TV.SF03.EHE. 2019-09-13T18:09:49.01 0.1 undecidable manual P 274 10.9779 125 0.28 94
TV.SF04.EHZ. 2019-09-13T18:09:49.56 0.1 undecidable manual P 289 13.7751 119 0.36 92
IV.SACS.HHZ. 2019-09-13T18:09:48.48 0.1 positive manual P 51 9.3795 129 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACS.HHE. ML:1.2 0.00026450000000000003 0.66 AML other m 2019-09-13T18:09:50.62
IV.MCIV.CHN. ML:0.9 0.000108 0.88 AML other m 2019-09-13T18:09:51.45
IV.SACS.HHN. ML:1.0 0.000162 0.4 AML other m 2019-09-13T18:09:51.89
TV.SF04.EHE. ML:1.2 0.000192 0.24 AML other m 2019-09-13T18:09:52.30
IV.MCIV.CHE. ML:1.0 0.0001225 0.22 AML other m 2019-09-13T18:09:52.82
TV.SF04.EHN. ML:1.2 0.00017549999999999998 0.9 AML other m 2019-09-13T18:09:52.72
TV.SF01.EHE. ML:1.2 0.0001109 0.7 AML other m 2019-09-13T18:09:54.87
TV.SF01.EHN. ML:1.3 0.00014250000000000002 1.82 AML other m 2019-09-13T18:09:54.02
IV.LATE.HHN. ML:1.4 0.00020250000000000002 1.04 AML other m 2019-09-13T18:09:55.04
IV.MGAB.HHE. ML:1.1 0.000067 1.42 AML other m 2019-09-13T18:09:57.86
IV.LATE.HHE. ML:1.3 0.0001589397 0.88 AML other m 2019-09-13T18:09:57.07
IV.MGAB.HHN. ML:1.2 0.00008444999999999999 0.88 AML other m 2019-09-13T18:09:57.85
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download