Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.0 on date 05-12-2020 and time 22:47:35 (UTC) in region 4 km W Castellina in Chianti (SI)

A magnitude ML 2.0 earthquake occured in region: 4 km W Castellina in Chianti (SI), on

  • 05-12-2020 22:47:35 (UTC)
  • 05-12-2020 23:47:35 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.4650, 11.2330 at 8 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 4 2859 2859
Poggibonsi SI 7 29196 32055
Monteriggioni SI 8 9810 41865
Barberino Val d'Elsa FI 10 4386 46251
Colle di Val d'Elsa SI 10 21620 67871
Radda in Chianti SI 12 1613 69484
Tavarnelle Val di Pesa FI 12 7800 77284
Greve in Chianti FI 15 13862 91146
San Gimignano SI 15 7820 98966
Gaiole in Chianti SI 16 2758 101724
Certaldo FI 18 16121 117845
Siena SI 18 53903 171748

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km NW of Siena (53903 inhabitants)
33 Km S of Scandicci (50609 inhabitants)
34 Km S of Firenze (382808 inhabitants)
48 Km S of Prato (191150 inhabitants)
53 Km W of Arezzo (99543 inhabitants)
58 Km SE of Pistoia (90315 inhabitants)
72 Km SE of Lucca (89046 inhabitants)
73 Km E of Pisa (89158 inhabitants)
75 Km E of Livorno (159219 inhabitants)
79 Km N of Grosseto (82087 inhabitants)
91 Km E of Viareggio (62467 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 2.0 2020-12-05
22:47:35		 43.4647 11.2332 8 2021-02-26
14:56:11		 Bollettino Sismico Italiano INGV 85469651
Reviewed
Rev100 		ML 2.0 2020-12-05
22:47:35		 43.4658 11.2338 8 2020-12-05
23:06:29		 Sala Sismica INGV-Roma 85225071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-05 22:47:35 ± 0.11
Latitude 43.4647 ± 0.0072
Longitude 11.2332 ± 0.0136
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 85469651

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1189
Semi-minor axis of confidence ellipse (meter) 475
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 119
Circular confidence region, given by single value of horizontal uncertainty (meter) 1190.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.34
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.66010
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 85469651
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-12-16 13:58:07

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 5
Type of magnitude ML
Reference to an origin 85225071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-05 23:06:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MTGR.HHZ. 2020-12-05T22:49:12.09 3.0 negative manual Pg 12.37 0
IV.SERS.HHZ. 2020-12-05T22:49:09.91 3.0 undecidable manual Pn 5.27 0
IV.MILZ.HHZ. 2020-12-05T22:49:08.11 3.0 undecidable manual Pn 3.94 0
IV.MPNC.HHZ. 2020-12-05T22:49:03.58 3.0 undecidable manual Pn -2.73 0
IV.MFNL.HHZ. 2020-12-05T22:49:02.51 3.0 positive manual Pn 1.06 0
IV.JOPP.HHZ. 2020-12-05T22:49:00.65 3.0 undecidable manual Pn -3.34 0
IV.SLCN.HHZ. 2020-12-05T22:48:56.75 3.0 undecidable manual Pg 13.34 0
IV.LNSS.HHZ. 2020-12-05T22:48:26.76 3.0 undecidable manual S 1.01 0
IV.SSP9.EHZ. 2020-12-05T22:47:57.98 0.6 undecidable manual S 80 73.2711 50 0.05 44
IV.RONT.HHZ. 2020-12-05T22:47:55.39 0.6 undecidable manual S 15 60.7947 50 0.79 37
IV.RINC.HHE. 2020-12-05T22:47:53.02 0.6 undecidable manual S 33 55.5999 50 -0.18 44
IV.MPPT.EHE. 2020-12-05T22:47:52.83 0.3 undecidable manual S 348 55.8996 50 -0.45 63
IV.TRIF.CHE. 2020-12-05T22:47:50.53 0.3 undecidable manual S 215 47.1195 50 -0.41 65
IV.RUFI.EHZ. 2020-12-05T22:47:50.40 0.3 undecidable manual S 28 47.0196 50 -0.51 63
IV.SSP9.EHZ. 2020-12-05T22:47:49.10 0.3 undecidable manual P 80 73.2711 50 0.79 54
IV.RONT.HHZ. 2020-12-05T22:47:47.04 0.3 undecidable manual P 15 60.7947 50 0.65 58
IV.PII.HHZ. 2020-12-05T22:47:46.93 0.3 undecidable manual P 297 63.6918 50 0.1 67
IV.MPPT.EHE. 2020-12-05T22:47:45.82 0.3 undecidable manual P 348 55.8996 50 0.19 67
IV.RINC.HHE. 2020-12-05T22:47:45.65 0.3 undecidable manual P 33 55.5999 50 0.07 68
IV.FROS.CHZ. 2020-12-05T22:47:45.48 0.3 undecidable manual S 192 28.9488 105 -0.1 71
IV.ASQU.HHE. 2020-12-05T22:47:45.56 0.3 undecidable manual P 50 57.8976 50 -0.38 64
IV.TRIF.CHE. 2020-12-05T22:47:44.08 0.3 undecidable manual P 215 47.1195 50 -0.2 67
IV.RUFI.EHZ. 2020-12-05T22:47:44.02 0.3 undecidable manual P 28 47.0196 50 -0.23 67
IV.FROS.CHZ. 2020-12-05T22:47:41.58 0.1 undecidable manual P 192 28.9488 105 0.4 89
IV.CSNT.HHZ. 2020-12-05T22:47:37.87 0.1 undecidable manual S 78 4.6953 149 -0.44 92
IV.CSNT.HHZ. 2020-12-05T22:47:37.03 0.1 undecidable manual P 78 4.6953 149 0.05 100
IV.OSSC.HNE. 2020-12-05T22:47:37.45 0.3 undecidable manual P 9 6.5934 140 0.24 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHN. ML:0.0 0.0047380955 0.2048 AML other m 2020-12-05T22:47:38.12
IV.CSNT.HHE. ML:0.0 0.0055772519999999996 0.128 AML other m 2020-12-05T22:47:38.03
IV.FROS.CHE. ML:2.0 0.00049826525 0.2688 AML other m 2020-12-05T22:47:45.82
IV.FROS.CHN. ML:1.8 0.00034951564999999995 0.384 AML other m 2020-12-05T22:47:49.38
IV.RUFI.EHE. ML:1.6 0.00010951199 2.56 AML other m 2020-12-05T22:48:04.49
IV.RUFI.EHN. ML:1.7 0.0001535711 3.8784 AML other m 2020-12-05T22:48:04.18
IV.PII.HHN. ML:1.9 0.0001451576 2.0352 AML other m 2020-12-05T22:47:49.05
IV.PII.HHE. ML:2.0 0.00020955425 2.7776 AML other m 2020-12-05T22:48:04.65
IV.RONT.HHE. ML:2.3 0.00037318355 0.1792 AML other m 2020-12-05T22:47:56.54
IV.RONT.HHN. ML:2.2 0.00032001145 0.1536 AML other m 2020-12-05T22:47:57.20
IV.SSP9.EHE. ML:2.2 0.00023418870000000002 2.9952 AML other m 2020-12-05T22:48:11.05
IV.SSP9.EHN. ML:2.2 0.00026747015 3.1232 AML other m 2020-12-05T22:48:06.46
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
Waveforms Seismic signals in miniseed + resp format Download