Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 30-11-2019 and time 23:40:05 (UTC) in region 1 km SW Radicofani (SI)

A magnitude ML 1.6 earthquake occured in region: 1 km SW Radicofani (SI), on

  • 30-11-2019 23:40:05 (UTC)
  • 01-12-2019 00:40:05 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.8930, 11.7590 at 7 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
Radicofani SI 1 1097 1097
Abbadia San Salvatore SI 7 6444 7541
Piancastagnaio SI 7 4230 11771
San Casciano dei Bagni SI 10 1632 13403
Castell'Azzara GR 14 1476 14879
Cetona SI 14 2755 17634
Sarteano SI 14 4717 22351
Santa Fiora GR 16 2622 24973
Proceno VT 16 557 25530
Seggiano GR 17 961 26491
Castiglione d'Orcia SI 17 2346 28837
Castel del Piano GR 18 4690 33527
Arcidosso GR 18 4285 37812
Acquapendente VT 19 5506 43318
Chianciano Terme SI 20 7105 50423
Allerona TR 20 1794 52217

Municipalities with at least 50000 inhabitants

An earthquake occurred to
55 Km E of Grosseto (82087 inhabitants)
57 Km W of Perugia (166134 inhabitants)
59 Km SE of Siena (53903 inhabitants)
60 Km NW of Viterbo (67173 inhabitants)
65 Km S of Arezzo (99543 inhabitants)
77 Km W of Foligno (57155 inhabitants)
81 Km W of Terni (111501 inhabitants)
89 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 2019-11-30
23:40:05		 42.8927 11.7592 7 2020-02-28
16:42:27		 Bollettino Sismico Italiano INGV 76781571
Reviewed
Rev100 		ML 1.6 2019-11-30
23:40:05		 42.876 11.7593 10 2019-11-30
23:46:43		 Sala Sismica INGV-Roma 74202791
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-11-30 23:40:05 ± 0.09
Latitude 42.8927 ± 0.0117
Longitude 11.7592 ± 0.0061
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 76781571

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1262
Semi-minor axis of confidence ellipse (meter) 388
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) 1260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 115
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.09173
Epicentral distance of station farthest from the epicenter (degree) 0.73295
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 76781571
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-24 18:34:17

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 74202791
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-11-30 23:46:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.OSSC.HNE. 2019-11-30T23:40:20.42 0.3 undecidable manual P 330 81.3519 50 0.01 66
IV.TRIF.CHZ. 2019-11-30T23:40:19.65 0.1 undecidable manual P 290 73.6707 50 0.42 82
IV.CSNT.HHZ. 2019-11-30T23:40:19.12 0.1 undecidable manual P 330 74.7696 50 -0.27 85
IV.FROS.CHZ. 2019-11-30T23:40:17.08 0.1 undecidable manual P 306 60.1953 50 -0.07 91
IV.RIBO.EHE.01 2019-11-30T23:40:17.19 0.3 undecidable manual P 276 58.1973 50 0.34 65
IV.MGAB.HHZ. 2019-11-30T23:40:16.26 0.6 undecidable manual S 85 28.749 103 0.12 48
IV.ARCI.HHZ. 2019-11-30T23:40:13.87 0.6 undecidable manual S 259 23.4543 106 -0.5 44
TV.SF01.EHZ. 2019-11-30T23:40:12.44 0.6 undecidable manual S 241 18.2706 110 -0.21 48
IV.SACS.HHZ. 2019-11-30T23:40:11.76 0.6 undecidable manual S 112 13.1757 117 0.74 41
IV.MCIV.CHZ. 2019-11-30T23:40:11.38 0.6 undecidable manual S 208 14.3745 115 0 50
IV.MGAB.HHZ. 2019-11-30T23:40:11.32 0.1 undecidable manual P 85 28.749 103 -0.49 88
IV.LATE.HHZ. 2019-11-30T23:40:11.86 0.1 undecidable manual P 173 31.1466 102 -0.42 89
IV.ARCI.HHZ. 2019-11-30T23:40:10.86 0.1 positive manual P 259 23.4543 106 0.07 97
TV.SF04.EHZ. 2019-11-30T23:40:10.31 0.6 undecidable manual S 232 10.1787 123 0.18 49
IV.MCIV.CHZ. 2019-11-30T23:40:09.06 0.1 positive manual P 208 14.3745 115 0 100
TV.SF01.EHZ. 2019-11-30T23:40:09.93 0.1 positive manual P 241 18.2706 110 0.14 97
TV.SF04.EHZ. 2019-11-30T23:40:08.48 0.1 undecidable manual P 232 10.1787 123 0.14 98
IV.SACS.HHZ. 2019-11-30T23:40:08.94 0.1 undecidable manual P 112 13.1757 117 0.09 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
TV.SF04.EHN. ML:2.5 0.00433 0.12 AML other m 2019-11-30T23:40:10.59
TV.SF04.EHE. ML:2.4 0.003665 0.3 AML other m 2019-11-30T23:40:10.64
IV.MCIV.CHE. ML:1.8 0.0007050000000000001 0.32 AML other m 2019-11-30T23:40:11.70
IV.MCIV.CHN. ML:2.0 0.001053 1.42 AML other m 2019-11-30T23:40:11.84
IV.SACS.HNN. ML:1.5 0.00036650000000000007 1.24 AML other m 2019-11-30T23:40:12.62
TV.SF01.EHE. ML:1.8 0.0005445 0.32 AML other m 2019-11-30T23:40:13.02
TV.SF01.EHN. ML:1.8 0.0005855 1.68 AML other m 2019-11-30T23:40:13.96
IV.ARCI.HHN. ML:1.6 0.00023349999999999998 0.3 AML other m 2019-11-30T23:40:14.20
IV.ARCI.HHE. ML:1.5 0.00020850000000000003 0.36 AML other m 2019-11-30T23:40:14.47
IV.SACS.HHN. ML:1.4 0.0003085 0.42 AML other m 2019-11-30T23:40:15.13
IV.SACS.HNE. ML:1.5 0.000388 0.38 AML other m 2019-11-30T23:40:16.18
IV.SACS.HHE. ML:1.5 0.000377 0.42 AML other m 2019-11-30T23:40:16.18
IV.MGAB.HHN. ML:1.4 0.00012335 1.16 AML other m 2019-11-30T23:40:17.19
IV.MGAB.HNN. ML:1.3 0.00011549999999999999 0.42 AML other m 2019-11-30T23:40:18.12
IV.MGAB.HNE. ML:1.3 0.00011724999999999999 0.9 AML other m 2019-11-30T23:40:18.75
IV.MGAB.HHE. ML:1.4 0.0001346 1.18 AML other m 2019-11-30T23:40:18.75
IV.LATE.HHN. ML:1.7 0.00022849999999999997 1.08 AML other m 2019-11-30T23:40:19.77
IV.LATE.HHE. ML:1.5 0.00015099999999999998 0.78 AML other m 2019-11-30T23:40:19.57
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