Earthquake with magnitude of ML 1.6 on date 12-12-2020 and time 03:13:56 (Italy) in region 3 km S Radicofani (SI)

A magnitude ML 1.6 earthquake occured in region: 3 km S Radicofani (SI), on

  • 12-12-2020 02:13:56 (UTC)
  • 12-12-2020 03:13:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.88, 11.77 at 10 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.

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 3 1097 1097
Piancastagnaio SI 7 4230 5327
Abbadia San Salvatore SI 7 6444 11771
San Casciano dei Bagni SI 9 1632 13403
Castell'Azzara GR 12 1476 14879
Proceno VT 14 557 15436
Cetona SI 15 2755 18191
Sarteano SI 15 4717 22908
Santa Fiora GR 15 2622 25530
Acquapendente VT 17 5506 31036
Seggiano GR 18 961 31997
Allerona TR 18 1794 33791
Arcidosso GR 19 4285 38076
Castel del Piano GR 19 4690 42766
Castiglione d'Orcia SI 19 2346 45112

Municipalities with at least 50000 inhabitants

An earthquake occurred to
55 Km E of Grosseto (82087 inhabitants)
57 Km W of Perugia (166134 inhabitants)
58 Km NW of Viterbo (67173 inhabitants)
61 Km SE of Siena (53903 inhabitants)
67 Km S of Arezzo (99543 inhabitants)
77 Km W of Foligno (57155 inhabitants)
80 Km W of Terni (111501 inhabitants)
87 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 1.6 2020-12-12
02:13:56
42.87 11.77 10 2021-02-26
14:56:18
Bollettino Sismico Italiano INGV 87040911
Reviewed
Rev100
ML 1.7 2020-12-12
02:13:55
42.88 11.78 10 2020-12-12
02:25:06
Sala Sismica INGV-Roma 85365611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-12 02:13:56 ± 0.09
Latitude 42.87 ± 0.01
Longitude 11.77 ± 0.01
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87040911

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1609
Semi-minor axis of confidence ellipse (meter) 803
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 183
Circular confidence region, given by single value of horizontal uncertainty (meter) 1610
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 111
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.08723
Epicentral distance of station farthest from the epicenter (degree) 1.01803
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 18
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 85365611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-12 02:25:06

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 87040911
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-11 11:54:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MURB.HHZ. 2020-12-12T02:14:19.71 0.1 undecidable manual S 55 0.6763 50 0.89 69
IV.RUFI.EHE. 2020-12-12T02:14:15.35 0.1 undecidable manual P 349 0.9803 50 0.92 64
IV.RINC.HHN. 2020-12-12T02:14:14.48 0.1 undecidable manual P 354 1.018 50 -0.59 73
IV.ASQU.HHE. 2020-12-12T02:14:14.39 0.1 undecidable manual P 1 0.9218 50 0.97 63
IV.ATVA.EHE. 2020-12-12T02:14:14.71 0.6 undecidable manual S 43 0.5531 50 -0.48 42
IV.CAFI.HHN. 2020-12-12T02:14:12.55 0.3 undecidable manual S 18 0.4766 50 -0.37 65
IV.CRE.HHE. 2020-12-12T02:14:11.13 0.1 undecidable manual P 10 0.7554 50 0.54 78
IV.CSNT.HHZ. 2020-12-12T02:14:09.05 0.1 undecidable manual P 330 0.6916 50 -0.44 82
IV.MURB.HHZ. 2020-12-12T02:14:09.89 0.6 undecidable manual P 55 0.6763 50 0.67 38
IV.RIBO.EHZ.01 2020-12-12T02:14:07.25 1.0 undecidable manual P 278 0.5324 50 0.49 21
IV.ATMI.HHZ. 2020-12-12T02:14:07.69 0.1 undecidable manual P 38 0.5873 50 -0.01 92
IV.FROS.CHZ. 2020-12-12T02:14:07.32 0.1 undecidable manual P 307 0.5576 50 0.13 90
IV.ATVA.EHE. 2020-12-12T02:14:06.62 0.1 undecidable manual P 43 0.5531 50 -0.51 83
IV.MGAB.HHZ. 2020-12-12T02:14:05.92 0.6 undecidable manual S 81 0.2563 50 -0.45 45
IV.CAFI.HHN. 2020-12-12T02:14:05.22 0.3 undecidable manual P 18 0.4766 50 -0.6 61
IV.ARCI.HHZ. 2020-12-12T02:14:04.53 0.6 undecidable manual S 264 0.214 113 -0.56 44
TV.SF14.HHZ. 2020-12-12T02:14:03.24 0.3 undecidable manual S 223 0.1637 119 -0.08 74
IV.MCIV.CHZ. 2020-12-12T02:14:02.02 0.3 undecidable manual S 215 0.1169 128 0.21 72
TV.SF03.EHZ. 2020-12-12T02:14:01.02 0.1 undecidable manual S 220 0.0935 134 -0.11 99
IV.ARCI.HHZ. 2020-12-12T02:14:01.23 0.1 undecidable manual P 264 0.214 113 -0.06 98
IV.MGAB.HHZ. 2020-12-12T02:14:01.34 0.1 undecidable manual P 81 0.2563 50 -0.69 82
IV.SACS.HHZ. 2020-12-12T02:14:01.71 0.6 undecidable manual S 104 0.1079 130 0.16 49
TV.SF14.HHZ. 2020-12-12T02:14:00.42 0.1 undecidable manual P 223 0.1637 119 0.15 97
TV.SF04.EHZ. 2020-12-12T02:14:00.73 0.1 undecidable manual S 243 0.0872 136 -0.23 97
IV.SACS.HHZ. 2020-12-12T02:13:59.19 0.1 undecidable manual P 104 0.1079 130 -0.06 100
TV.SF03.EHZ. 2020-12-12T02:13:59.21 0.1 undecidable manual P 220 0.0935 134 0.2 97
IV.MCIV.CHZ. 2020-12-12T02:13:59.60 0.1 undecidable manual P 215 0.1169 128 0.2 97
TV.SF04.EHZ. 2020-12-12T02:13:58.98 0.1 undecidable manual P 243 0.0872 136 0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF04.EHN. ML:2 0.00143 0.44 AML other m 2020-12-12T02:14:01.33
TV.SF04.EHE. ML:2 0.00145 0.38 AML other m 2020-12-12T02:14:01.39
IV.MCIV.CHE. ML:1.7 0.0005745 0.54 AML other m 2020-12-12T02:14:02.85
IV.MCIV.CHN. ML:1.9 0.000828 0.84 AML other m 2020-12-12T02:14:02.61
IV.SACS.HHE. ML:1.5 0.00036372255 0.16 AML other m 2020-12-12T02:14:03.53
IV.SACS.HNE. ML:1.5 0.000381 0.42 AML other m 2020-12-12T02:14:03.53
IV.SACS.HHN. ML:1.4 0.0002681689 0.4 AML other m 2020-12-12T02:14:06.10
IV.SACS.HNN. ML:1.4 0.00027250285 0.3904 AML other m 2020-12-12T02:14:06.10
IV.ARCI.HHE. ML:1.1 8.105E-5 0.52 AML other m 2020-12-12T02:14:06.29
IV.ARCI.HHN. ML:1 5.685E-5 0.36 AML other m 2020-12-12T02:14:06.53
IV.MGAB.HHE. ML:1.3 9.91E-5 0.64 AML other m 2020-12-12T02:14:07.31
IV.MGAB.HHN. ML:1.3 0.000111 0.12 AML other m 2020-12-12T02:14:07.48
IV.ATMI.HHN. ML:1.9 0.0001335 0.68 AML other m 2020-12-12T02:14:20.38
IV.MURB.HHN. ML:2 0.0001555 0.26 AML other m 2020-12-12T02:14:23.36
IV.ATMI.HHE. ML:1.7 9.27E-5 0.38 AML other m 2020-12-12T02:14:23.69
IV.MURB.HHE. ML:1.8 9.78E-5 0.62 AML other m 2020-12-12T02:14:24.22
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