Earthquake with magnitude of ML 1.6 on date 30-11-2020 and time 15:50:27 (UTC) in region 2 km W Castellina in Chianti (SI)

A magnitude ML 1.6 earthquake occured in region: 2 km W 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) 43.47, 11.26 at 8 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.

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 2 2859 2859
Monteriggioni SI 9 9810 12669
Poggibonsi SI 9 29196 41865
Radda in Chianti SI 9 1613 43478
Barberino Val d'Elsa FI 11 4386 47864
Tavarnelle Val di Pesa FI 12 7800 55664
Colle di Val d'Elsa SI 13 21620 77284
Greve in Chianti FI 13 13862 91146
Gaiole in Chianti SI 14 2758 93904
San Gimignano SI 18 7820 101724
Siena SI 18 53903 155627
Cavriglia AR 19 9614 165241
Certaldo FI 20 16121 181362

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km NW of Siena (53903 inhabitants)
33 Km S of Scandicci (50609 inhabitants)
33 Km S of Firenze (382808 inhabitants)
48 Km S of Prato (191150 inhabitants)
50 Km W of Arezzo (99543 inhabitants)
59 Km SE of Pistoia (90315 inhabitants)
74 Km SE of Lucca (89046 inhabitants)
74 Km E of Pisa (89158 inhabitants)
77 Km E of Livorno (159219 inhabitants)
80 Km N of Grosseto (82087 inhabitants)
93 Km E of Viareggio (62467 inhabitants)
100 Km W of Perugia (166134 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.6 2020-11-30
15:50:27
43.47 11.26 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 ± 0.12
Latitude 43.47 ± 0.01
Longitude 11.26 ± 0.03
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 85107971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2621
Semi-minor axis of confidence ellipse (meter) 556
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 111
Circular confidence region, given by single value of horizontal uncertainty (meter) 2620
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 125
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.73834
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: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 Takeoff_angle Residual Weight
IV.CASP.HHZ. 2020-11-30T15:50:52.04 0.6 undecidable manual S 203 0.7383 50 -0.3 41
IV.TRIF.CHZ. 2020-11-30T15:50:45.68 0.6 undecidable manual S 0.11 0.77
IV.CASP.HHZ. 2020-11-30T15:50:42.28 0.3 undecidable manual P 203 0.7383 50 0.56 58
IV.RUFI.EHZ. 2020-11-30T15:50:42.13 0.6 undecidable manual S 26 0.4083 50 -0.43 43
IV.FROS.CHZ. 2020-11-30T15:50:37.54 0.6 undecidable manual S 196 0.2716 104 -0.48 44
IV.RUFI.EHZ. 2020-11-30T15:50:36.23 0.1 undecidable manual P 26 0.4083 50 0.15 92
IV.CRMI.HHE. 2020-11-30T15:50:35.57 0.1 undecidable manual P 328 0.3831 50 -0.08 93
IV.FROS.CHZ. 2020-11-30T15:50:33.56 0.1 positive manual P 196 0.2716 104 0.1 95
IV.CSNT.HHZ. 2020-11-30T15:50:29.84 0.6 undecidable manual S 84 0.0207 163 -0.13 50
IV.CSNT.HHZ. 2020-11-30T15:50:28.90 0.1 undecidable manual P 84 0.0207 163 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHE. ML:1.8 0.000274 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:1.4 5.9E-5 0.46 AML other m 2020-11-30T15:50:49.41
IV.TRIF.CHE. ML:1.5 7.985E-5 0.92 AML other m 2020-11-30T15:50:49.62
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