Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 16-11-2019 and time 01:49:07 (Italy) in region 1 km NE Colle di Val d'Elsa (SI)

A magnitude ML 1.7 earthquake occured in region: 1 km NE Colle di Val d'Elsa (SI), on

  • 16-11-2019 00:49:07 (UTC)
  • 16-11-2019 01:49:07 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.43, 11.13 at 9 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.

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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
Colle di Val d'Elsa SI 2 21620 21620
Poggibonsi SI 4 29196 50816
San Gimignano SI 8 7820 58636
Monteriggioni SI 9 9810 68446
Casole d'Elsa SI 12 3897 72343
Barberino Val d'Elsa FI 13 4386 76729
Castellina in Chianti SI 13 2859 79588
Certaldo FI 15 16121 95709
Tavarnelle Val di Pesa FI 15 7800 103509
Gambassi Terme FI 18 4870 108379
Sovicille SI 19 10116 118495

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NW of Siena (53903 inhabitants)
37 Km S of Scandicci (50609 inhabitants)
39 Km S of Firenze (382808 inhabitants)
50 Km S of Prato (191150 inhabitants)
58 Km SE of Pistoia (90315 inhabitants)
61 Km W of Arezzo (99543 inhabitants)
67 Km E of Pisa (89158 inhabitants)
67 Km E of Livorno (159219 inhabitants)
68 Km SE of Lucca (89046 inhabitants)
75 Km N of Grosseto (82087 inhabitants)
86 Km SE of Viareggio (62467 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
Rev 100 ML 1.7 2019-11-16
00:49:07		 43.43 11.13 9 2019-11-16
00:58:19		 Sala Sismica INGV-Roma 73867111
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-11-16 00:49:07 ± 0.08
Latitude 43.43 ± 0.00
Longitude 11.13 ± 0.02
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 73867111

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1553
Semi-minor axis of confidence ellipse (meter) 451
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 100
Circular confidence region, given by single value of horizontal uncertainty (meter) 1550
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 104
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.57287
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 73867111
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-11-16 00:58:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MCRV.HHZ. 2019-11-16T00:51:00.88 3.0 undecidable manual Sn 3.3 0
IV.BRES.EHZ. 2019-11-16T00:50:46.13 3.0 undecidable manual Sg 6.15 0
IV.AGLI.HHZ. 2019-11-16T00:50:21.99 3.0 undecidable manual Sn -3.89 0
IV.SACR.HHZ. 2019-11-16T00:49:59.94 3.0 undecidable manual Pn -0.17 0
IV.MC2.EHZ. 2019-11-16T00:49:58.26 3.0 undecidable manual Sn -0.44 0
IV.NRCA.HHZ. 2019-11-16T00:49:58.85 3.0 undecidable manual S 0.7 0
IV.PII.HHZ. 2019-11-16T00:49:25.23 0.3 undecidable manual S 304 0.5243 50 -0.22 67
IV.FNVD.HHZ. 2019-11-16T00:49:22.54 3.0 undecidable manual P -0.05 0
IV.TRIF.CHZ. 2019-11-16T00:49:20.33 0.3 undecidable manual S 207 0.3579 50 -0.2 69
IV.MAGO.CHZ. 2019-11-16T00:49:20.67 0.3 undecidable manual S 245 0.3777 50 -0.44 66
IV.CRE.HHZ. 2019-11-16T00:49:20.42 3.0 negative manual P -0.35 0
IV.MOCL.EHZ. 2019-11-16T00:49:19.10 0.3 undecidable manual P 4 0.5729 50 0.6 60
IV.PII.HHZ. 2019-11-16T00:49:17.84 0.6 undecidable manual P 304 0.5243 50 0.17 45
IV.FROS.CHZ. 2019-11-16T00:49:16.29 0.1 undecidable manual S 175 0.2239 110 0.04 98
IV.MAGO.CHZ. 2019-11-16T00:49:15.36 0.1 undecidable manual P 245 0.3777 50 0.19 92
IV.CRMI.HHZ. 2019-11-16T00:49:15.06 0.3 undecidable manual P 343 0.3777 50 -0.11 70
IV.TRIF.CHZ. 2019-11-16T00:49:14.92 0.1 undecidable manual P 207 0.3579 50 0.09 95
IV.FROS.CHZ. 2019-11-16T00:49:12.52 0.1 positive manual P 175 0.2239 110 0.16 96
IV.CSNT.HHZ. 2019-11-16T00:49:12.40 0.1 undecidable manual S 71 0.1232 124 -0.38 93
IV.OSSC.HHZ. 2019-11-16T00:49:12.70 0.1 undecidable manual S 43 0.1241 124 -0.09 99
IV.OSSC.HHZ. 2019-11-16T00:49:10.53 0.1 positive manual P 43 0.1241 124 0.17 98
IV.CSNT.HHZ. 2019-11-16T00:49:10.41 0.1 positive manual P 71 0.1232 124 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHN. ML:1.7 0.0005765 0.16 AML other m 2019-11-16T00:49:12.49
IV.CSNT.HHE. ML:1.8 0.0007255 0.5 AML other m 2019-11-16T00:49:12.62
IV.FROS.CHE. ML:1.7 0.000291 0.24 AML other m 2019-11-16T00:49:17.14
IV.OSSC.HHE. ML:1.8 0.0007701246 0.36 AML other m 2019-11-16T00:49:12.96
IV.OSSC.HHN. ML:1.7 0.0005713076 0.16 AML other m 2019-11-16T00:49:12.96
IV.OSSC.HNE. ML:1.7 0.0005945046 0.17 AML other m 2019-11-16T00:49:12.96
IV.OSSC.HNN. ML:1.8 0.00078835535 0.36 AML other m 2019-11-16T00:49:12.96
IV.FROS.CHN. ML:1.6 0.00024736975 0.304 AML other m 2019-11-16T00:49:16.49
IV.TRIF.CHE. ML:1.8 0.00022530495 0.192 AML other m 2019-11-16T00:49:21.09
IV.TRIF.CHN. ML:1.9 0.0002832585 0.144 AML other m 2019-11-16T00:49:20.84
IV.MAGO.CHE. ML:1.8 0.00018420535 0.152 AML other m 2019-11-16T00:49:22.55
IV.MAGO.CHN. ML:1.6 0.00014749485 0.136 AML other m 2019-11-16T00:49:21.15
IV.PII.HHE. ML:1.3 3.8135576E-5 0.22 AML other m 2019-11-16T00:49:25.33
IV.PII.HHN. ML:1.5 6.419446E-5 0.38 AML other m 2019-11-16T00:49:27.94
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