Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 10-11-2020 and time 19:15:55 (Italy) in region 2 km NW Radicofani (SI)

A magnitude ML 0.9 earthquake occured in region: 2 km NW Radicofani (SI), on

  • 10-11-2020 18:15:55 (UTC)
  • 10-11-2020 19:15:55 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9080, 11.7530 at 1 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.

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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
Radicofani SI 2 1097 1097
Abbadia San Salvatore SI 7 6444 7541
Piancastagnaio SI 8 4230 11771
San Casciano dei Bagni SI 11 1632 13403
Sarteano SI 13 4717 18120
Cetona SI 14 2755 20875
Castell'Azzara GR 16 1476 22351
Castiglione d'Orcia SI 16 2346 24697
Santa Fiora GR 16 2622 27319
Seggiano GR 16 961 28280
Castel del Piano GR 18 4690 32970
Arcidosso GR 18 4285 37255
Proceno VT 18 557 37812
Chianciano Terme SI 18 7105 44917
Pienza SI 20 2107 47024

Municipalities with at least 50000 inhabitants

An earthquake occurred to
55 Km E of Grosseto (82087 inhabitants)
56 Km W of Perugia (166134 inhabitants)
57 Km SE of Siena (53903 inhabitants)
62 Km NW of Viterbo (67173 inhabitants)
63 Km S of Arezzo (99543 inhabitants)
78 Km W of Foligno (57155 inhabitants)
83 Km W of Terni (111501 inhabitants)
91 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
Reviewed
Rev100 		ML 0.9 2020-11-10
18:15:55		 42.9083 11.7533 1 2020-11-10
18:20:04		 Sala Sismica INGV-Roma 84612351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-10 18:15:55 ± 0.2
Latitude 42.9083 ± 0.0153
Longitude 11.7533 ± 0.0086
Depth (km) 1 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84612351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1816
Semi-minor axis of confidence ellipse (meter) 310
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 341
Circular confidence region, given by single value of horizontal uncertainty (meter) 1820.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 194
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.09982
Epicentral distance of station farthest from the epicenter (degree) 0.26260
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 84612351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-10 18:20:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MGAB.HHZ. 2020-11-10T18:16:05.26 0.1 undecidable manual S 89 29.1486 92 -0.05 100
TV.SF01.EHZ. 2020-11-10T18:16:01.51 0.1 undecidable manual S 235 18.7701 93 -0.21 99
IV.MGAB.HHZ. 2020-11-10T18:16:00.79 0.6 positive manual P 89 29.1486 92 -0.24 48
IV.ARCI.HHZ. 2020-11-10T18:16:00.12 1.0 positive manual P 255 23.4543 92 0.23 24
TV.SF01.EHZ. 2020-11-10T18:15:59.13 0.3 negative manual P 235 18.7701 93 0.17 74
TV.SF04.EHZ. 2020-11-10T18:15:59.07 0.3 undecidable manual S 223 11.0778 95 0.03 78
IV.MCIV.CHZ. 2020-11-10T18:15:58.26 1.0 negative manual P 203 15.6732 94 -0.08 25
IV.SACS.HHZ. 2020-11-10T18:15:58.36 0.6 positive manual P 117 14.2746 94 0.3 49
TV.SF04.EHZ. 2020-11-10T18:15:57.63 1.0 undecidable manual P 223 11.0778 95 0.22 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF04.EHE. ML:1.3 0.00032936935 0.1664 AML other m 2020-11-10T18:15:59.44
TV.SF04.EHN. ML:1.3 0.00035812785000000004 0.1664 AML other m 2020-11-10T18:15:59.62
IV.MCIV.CHE. ML:0.7 0.000052887405 0.1792 AML other m 2020-11-10T18:16:02.11
IV.MCIV.CHN. ML:0.8 0.00007361048 0.1664 AML other m 2020-11-10T18:16:01.91
IV.SACS.HNE. ML:1.0 0.0001159936 0.4864 AML other m 2020-11-10T18:16:00.03
IV.SACS.HNN. ML:0.9 0.000103848335 0.6016 AML other m 2020-11-10T18:16:00.48
IV.SACS.HHE. ML:0.4 0.000036658425 0.3712 AML other m 2020-11-10T18:16:05.27
IV.SACS.HHN. ML:0.4 0.00003120672 0.256 AML other m 2020-11-10T18:16:04.23
TV.SF01.EHE. ML:1.0 0.00008872504 0.2176 AML other m 2020-11-10T18:16:01.63
TV.SF01.EHN. ML:1.0 0.00009452539000000002 0.192 AML other m 2020-11-10T18:16:01.63
IV.ARCI.HHE. ML:0.7 0.000036715285 0.1536 AML other m 2020-11-10T18:16:04.35
IV.ARCI.HHN. ML:0.6 0.00002343588 0.1792 AML other m 2020-11-10T18:16:03.53
IV.MGAB.HHE. ML:0.6 0.000021476295 0.192 AML other m 2020-11-10T18:16:06.51
IV.MGAB.HHN. ML:0.7 0.00002743485 0.1792 AML other m 2020-11-10T18:16:06.37
IV.MGAB.HNE. ML:1.3 0.00011561879999999999 0.8192 AML other m 2020-11-10T18:16:04.20
IV.MGAB.HNN. ML:1.4 0.000131004905 0.7168 AML other m 2020-11-10T18:16:16.47
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