Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 30-11-2020 and time 16:50:27 (Italy) in region 3 km SW Castellina in Chianti (SI)

A magnitude ML 1.5 earthquake occured in region: 3 km SW Castellina in Chianti (SI), on

  • 30-11-2020 15:50:27 (UTC)
  • 30-11-2020 16:50:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.4490, 11.2570 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
Castellina in Chianti SI 3 2859 2859
Monteriggioni SI 7 9810 12669
Poggibonsi SI 9 29196 41865
Radda in Chianti SI 11 1613 43478
Colle di Val d'Elsa SI 12 21620 65098
Barberino Val d'Elsa FI 13 4386 69484
Tavarnelle Val di Pesa FI 14 7800 77284
Gaiole in Chianti SI 15 2758 80042
Siena SI 16 53903 133945
Greve in Chianti FI 16 13862 147807
San Gimignano SI 17 7820 155627
Sovicille SI 19 10116 165743

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NW of Siena (53903 inhabitants)
35 Km S of Scandicci (50609 inhabitants)
36 Km S of Firenze (382808 inhabitants)
50 Km S of Prato (191150 inhabitants)
51 Km W of Arezzo (99543 inhabitants)
60 Km SE of Pistoia (90315 inhabitants)
75 Km SE of Lucca (89046 inhabitants)
75 Km E of Pisa (89158 inhabitants)
77 Km E of Livorno (159219 inhabitants)
77 Km N of Grosseto (82087 inhabitants)
93 Km SE of Viareggio (62467 inhabitants)
99 Km W of Perugia (166134 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 1.5 2020-11-30
15:50:27		 43.449 11.2567 7 2021-02-26
14:56:09		 Bollettino Sismico Italiano INGV 85315451
Reviewed
Rev100 		ML 1.6 2020-11-30
15:50:27		 43.4708 11.2613 8 2020-11-30
15:55:10		 Sala Sismica INGV-Roma 85107971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-30 15:50:27 ± 0.07
Latitude 43.4490 ± 0.0027
Longitude 11.2567 ± 0.0062
Depth (km) 7 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 85315451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 424
Semi-minor axis of confidence ellipse (meter) 218
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 109
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 54
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.03417
Epicentral distance of station farthest from the epicenter (degree) 0.77701
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 85315451
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-09 10:52:53

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 85107971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-11-30 15:55:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BDI.HNZ. 2020-11-30T15:50:54.35 0.3 undecidable manual S 322 86.247 50 0.46 60
IV.CASP.HHZ. 2020-11-30T15:50:51.97 0.3 undecidable manual S 204 79.5648 50 -0.14 65
GU.POPM.HHZ. 2020-11-30T15:50:51.50 0.6 undecidable manual S 329 77.2671 50 0 45
IV.SEI.HHZ. 2020-11-30T15:50:49.11 0.6 undecidable manual S 7 67.6767 50 0.19 44
IV.CAFI.HNN. 2020-11-30T15:50:46.57 0.6 undecidable manual S 103 58.6968 50 0.03 46
IV.RINC.HHN. 2020-11-30T15:50:46.22 0.3 undecidable manual S 30 56.0994 50 0.38 64
IV.CRE.HHE. 2020-11-30T15:50:46.62 0.6 undecidable manual S 71 58.9965 50 0.01 46
IV.MAGO.CHE. 2020-11-30T15:50:44.53 0.6 undecidable manual S 248 52.1034 50 -0.23 45
IV.BDI.HNZ. 2020-11-30T15:50:43.20 0.3 undecidable manual P 322 86.247 50 0.49 59
IV.TRIF.CHZ. 2020-11-30T15:50:43.45 0.6 undecidable manual S 218 46.8198 50 0.09 46
IV.RUFI.EHZ. 2020-11-30T15:50:43.13 0.3 undecidable manual S 25 47.7189 50 -0.46 64
IV.CRMI.HHE. 2020-11-30T15:50:42.45 0.3 undecidable manual S 330 44.4222 50 -0.27 67
GU.POPM.HHZ. 2020-11-30T15:50:41.61 0.3 undecidable manual P 329 77.2671 50 0.28 63
IV.CASP.HHZ. 2020-11-30T15:50:41.69 0.3 undecidable manual P 204 79.5648 50 0.01 67
TV.SF14.HHN. 2020-11-30T15:50:41.86 0.1 undecidable manual P 159 82.251 50 -0.23 84
TV.SF13.HHN. 2020-11-30T15:50:41.31 0.1 undecidable manual P 157 75.8685 50 0.2 86
IV.PII.HHZ. 2020-11-30T15:50:39.88 0.3 undecidable manual P 297 66.1893 50 0.27 65
IV.SEI.HHZ. 2020-11-30T15:50:39.60 0.3 undecidable manual P 7 67.6767 50 -0.24 65
IV.ASQU.HHE. 2020-11-30T15:50:38.64 0.3 undecidable manual P 48 57.5979 50 0.35 65
IV.CAFI.HNN. 2020-11-30T15:50:38.54 0.1 undecidable manual P 103 58.6968 50 0.07 91
IV.CRE.HHE. 2020-11-30T15:50:38.85 0.3 undecidable manual P 71 58.9965 50 0.34 65
IV.MPPT.EHN. 2020-11-30T15:50:38.00 0.3 undecidable manual P 347 57.9975 50 -0.35 65
IV.FROS.CHZ. 2020-11-30T15:50:37.54 0.6 undecidable manual S 197 27.75 104 0.19 47
IV.RINC.HHN. 2020-11-30T15:50:37.82 0.3 undecidable manual P 30 56.0994 50 -0.24 66
IV.MAGO.CHE. 2020-11-30T15:50:37.19 0.3 undecidable manual P 248 52.1034 50 -0.25 67
IV.RUFI.EHZ. 2020-11-30T15:50:36.23 0.3 undecidable manual P 25 47.7189 50 -0.54 63
IV.TRIF.CHZ. 2020-11-30T15:50:36.46 0.3 undecidable manual P 218 46.8198 50 -0.17 68
IV.CRMI.HHE. 2020-11-30T15:50:35.94 0.3 undecidable manual P 330 44.4222 50 -0.32 67
IV.FIR.HNE. 2020-11-30T15:50:35.21 0.3 undecidable manual P 360 36.1416 101 0.41 66
IV.FROS.CHZ. 2020-11-30T15:50:33.35 0.3 undecidable manual P 197 27.75 104 0.19 71
IV.CSNT.HHZ. 2020-11-30T15:50:29.93 0.3 undecidable manual S 45 3.7962 151 -0.19 73
IV.CSNT.HHZ. 2020-11-30T15:50:28.90 0.1 undecidable manual P 45 3.7962 151 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHE. ML:1.7 0.00027400000000000005 0.2 AML other m 2020-11-30T15:50:37.79
IV.FROS.CHN. ML:1.6 0.000221 1.14 AML other m 2020-11-30T15:50:38.11
IV.TRIF.CHN. ML:1.3 0.000059 0.46 AML other m 2020-11-30T15:50:49.41
IV.TRIF.CHE. ML:1.4 0.00007985 0.92 AML other m 2020-11-30T15:50:49.62
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