Earthquake with magnitude of ML 1.0 on date 27-11-2020 and time 00:19:19 (Italy) in region 7 km N Proceno (VT)

A magnitude ML 1.0 earthquake occured in region: 7 km N Proceno (VT), on

  • 26-11-2020 23:19:19 (UTC)
  • 27-11-2020 00:19:19 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.82, 11.84 at 6 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
Proceno VT 7 557 557
San Casciano dei Bagni SI 7 1632 2189
Acquapendente VT 8 5506 7695
Radicofani SI 11 1097 8792
Allerona TR 11 1794 10586
Castell'Azzara GR 12 1476 12062
Piancastagnaio SI 12 4230 16292
Onano VT 14 995 17287
Abbadia San Salvatore SI 15 6444 23731
Castel Viscardo TR 15 2938 26669
Fabro TR 15 2876 29545
San Lorenzo Nuovo VT 16 2091 31636
Grotte di Castro VT 16 2683 34319
Castel Giorgio TR 17 2131 36450
Cetona SI 17 2755 39205
Sorano GR 18 3428 42633
Ficulle TR 19 1669 44302
Gradoli VT 19 1353 45655
Sarteano SI 20 4717 50372

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km NW of Viterbo (67173 inhabitants)
55 Km SW of Perugia (166134 inhabitants)
59 Km E of Grosseto (82087 inhabitants)
69 Km SE of Siena (53903 inhabitants)
72 Km W of Terni (111501 inhabitants)
72 Km W of Foligno (57155 inhabitants)
73 Km S of Arezzo (99543 inhabitants)
81 Km N of Civitavecchia (52991 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
Reviewed
Rev100
ML 1.0 2020-11-26
23:19:19
42.82 11.84 6 2020-11-26
23:48:45
Sala Sismica INGV-Roma 85040561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-26 23:19:19 ± 0.15
Latitude 42.82 ± 0.01
Longitude 11.84 ± 0.00
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85040561

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1277
Semi-minor axis of confidence ellipse (meter) 575
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 346
Circular confidence region, given by single value of horizontal uncertainty (meter) 1280
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 188
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.06205
Epicentral distance of station farthest from the epicenter (degree) 0.22303
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 85040561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-26 23:48:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MGAB.HHZ. 2020-11-26T23:19:28.41 0.6 undecidable manual S 64 0.223 103 0.09 48
TV.SF01.EHZ. 2020-11-26T23:19:27.25 0.6 undecidable manual S 269 0.2014 105 -0.26 46
TV.SF04.EHZ. 2020-11-26T23:19:25.06 0.6 undecidable manual S 278 0.1313 112 0.11 49
TV.SF01.EHZ. 2020-11-26T23:19:24.21 0.6 undecidable manual P 269 0.2014 105 0.09 48
IV.MGAB.HHZ. 2020-11-26T23:19:24.19 1.0 negative manual P 64 0.223 103 -0.4 22
IV.MCIV.CHZ. 2020-11-26T23:19:24.67 0.6 undecidable manual S 252 0.1241 113 -0.03 49
IV.MCIV.CHZ. 2020-11-26T23:19:22.57 0.3 negative manual P 252 0.1241 113 0.07 74
TV.SF04.EHZ. 2020-11-26T23:19:22.81 1.0 positive manual P 278 0.1313 112 0.17 24
IV.SACS.HHZ. 2020-11-26T23:19:22.59 0.6 undecidable manual S 58 0.0621 131 -0.05 50
IV.SACS.HHZ. 2020-11-26T23:19:21.34 0.1 positive manual P 58 0.0621 131 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACS.HNE. ML:0 0.0003215 0.26 AML other m 2020-11-26T23:19:23.08
IV.SACS.HHE. ML:0 0.000292 0.26 AML other m 2020-11-26T23:19:23.09
IV.SACS.HHN. ML:0 0.0002995 0.2 AML other m 2020-11-26T23:19:24.40
IV.SACS.HNN. ML:0 0.000261 0.44 AML other m 2020-11-26T23:19:24.40
IV.MCIV.CHE. ML:0.9 9.865E-5 1.6 AML other m 2020-11-26T23:19:25.05
TV.SF01.EHN. ML:1 7.92E-5 1.32 AML other m 2020-11-26T23:19:28.71
TV.SF01.EHE. ML:1 6.605E-5 0.3 AML other m 2020-11-26T23:19:28.10
IV.MGAB.HHE. ML:1.1 8.61E-5 0.22 AML other m 2020-11-26T23:19:29.36
IV.MGAB.HHN. ML:1.1 8.075E-5 0.16 AML other m 2020-11-26T23:19:29.23
IV.MCIV.CHN. ML:0.8 8.605E-5 1.06 AML other m 2020-11-26T23:19:29.29
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