Earthquake with magnitude of ML 1.3 on date 17-07-2019 and time 18:23:18 (Italy) in region 4 km NW Colle di Val d'Elsa (SI)

A magnitude ML 1.3 earthquake occured in region: 4 km NW Colle di Val d'Elsa (SI), on

  • 17-07-2019 16:23:18 (UTC)
  • 17-07-2019 18:23:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.44, 11.08 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
Colle di Val d'Elsa SI 4 21620 21620
San Gimignano SI 4 7820 29440
Poggibonsi SI 6 29196 58636
Casole d'Elsa SI 12 3897 62533
Certaldo FI 12 16121 78654
Monteriggioni SI 12 9810 88464
Barberino Val d'Elsa FI 13 4386 92850
Gambassi Terme FI 15 4870 97720
Tavarnelle Val di Pesa FI 15 7800 105520
Castellina in Chianti SI 17 2859 108379
Montaione FI 18 3700 112079
Volterra PI 18 10519 122598

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km NW of Siena (53903 inhabitants)
36 Km S of Scandicci (50609 inhabitants)
39 Km SW of Firenze (382808 inhabitants)
49 Km S of Prato (191150 inhabitants)
56 Km S of Pistoia (90315 inhabitants)
63 Km E of Pisa (89158 inhabitants)
63 Km E of Livorno (159219 inhabitants)
65 Km SE of Lucca (89046 inhabitants)
65 Km W of Arezzo (99543 inhabitants)
76 Km N of Grosseto (82087 inhabitants)
82 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 1.3 2019-07-17
16:23:18
43.44 11.08 8 2019-07-17
16:48:30
Sala Sismica INGV-Roma 70659261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-07-17 16:23:18 ± 0.13
Latitude 43.44 ± 0.01
Longitude 11.08 ± 0.01
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 70659261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1170
Semi-minor axis of confidence ellipse (meter) 481
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 101
Circular confidence region, given by single value of horizontal uncertainty (meter) 1170
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.50182
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 70659261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-07-17 16:48:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PZUN.HHZ. 2019-07-17T16:25:10.26 3.0 undecidable manual Sn -4.95 0
IV.DGI.HHZ. 2019-07-17T16:24:59.74 3.0 undecidable manual Sg 10.11 0
IV.IACL.HHZ. 2019-07-17T16:24:57.51 3.0 positive manual Pg 18.969999 0
IT.ORP.HGZ. 2019-07-17T16:24:56.67 3.0 undecidable manual Sn -0.99 0
IV.CLTA.HHZ. 2019-07-17T16:24:55.52 3.0 undecidable manual Pn 0.9 0
IV.SACR.HHZ. 2019-07-17T16:24:54.78 3.0 undecidable manual Sg 7 0
IV.CIGN.HHZ. 2019-07-17T16:24:44.19 3.0 undecidable manual Sn -2.74 0
IV.SGG.HHZ. 2019-07-17T16:24:38.64 3.0 undecidable manual Sn -4.78 0
IV.PZUN.HHZ. 2019-07-17T16:24:37.41 3.0 negative manual Pg 13.1 0
IV.CAPR.HNZ. 2019-07-17T16:24:37.63 3.0 undecidable manual Sg 10.8 0
IV.QLNO.HHZ. 2019-07-17T16:24:34.98 3.0 undecidable manual Sg 11.03 0
IV.PAOL.HHZ. 2019-07-17T16:24:23.54 3.0 positive manual Pg 12.31 0
MN.TRI.HHZ. 2019-07-17T16:24:10.24 3.0 negative manual Pg 6.24 0
IV.POFI.HHZ. 2019-07-17T16:23:58.29 3.0 undecidable manual Pn -0.04 0
IV.FOSV.EHZ. 2019-07-17T16:23:57.30 3.0 undecidable manual S 2.15 0
IV.RIBO.EHZ.01 2019-07-17T16:23:36.90 0.3 undecidable manual S 183 0.4946 50 0.17 68
IV.TRIF.CHE. 2019-07-17T16:23:32.21 0.3 undecidable manual S 202 0.3525 50 -0.32 68
IV.RUFI.EHE. 2019-07-17T16:23:29.52 0.3 undecidable manual P 38 0.5018 50 0.17 68
IV.RIBO.EHZ.01 2019-07-17T16:23:29.06 0.6 undecidable manual P 183 0.4946 50 -0.17 46
IV.PII.HHZ. 2019-07-17T16:23:28.80 0.6 undecidable manual P 305 0.4892 50 -0.34 44
IV.FROS.CHZ. 2019-07-17T16:23:28.45 0.3 undecidable manual S 167 0.2392 107 -0.18 72
IV.TRIF.CHE. 2019-07-17T16:23:27.00 0.3 undecidable manual P 202 0.3525 50 0.2 70
IT.FIE.HGZ. 2019-07-17T16:23:27.82 0.3 undecidable manual P 23 0.3948 50 0.29 68
IV.CRMI.HHE. 2019-07-17T16:23:26.56 0.3 undecidable manual P 348 0.3597 50 -0.36 68
IV.MAGO.CHE. 2019-07-17T16:23:26.76 0.1 undecidable manual P 241 0.3516 50 -0.01 97
IV.CSNT.HHZ. 2019-07-17T16:23:25.03 0.3 undecidable manual S 79 0.1547 115 -0.54 67
IV.OSSC.HHZ. 2019-07-17T16:23:25.13 0.3 undecidable manual S 56 0.1439 117 -0.07 75
IV.FROS.CHZ. 2019-07-17T16:23:24.84 0.1 positive manual P 167 0.2392 107 0.29 94
IV.OSSC.HHZ. 2019-07-17T16:23:22.91 0.1 positive manual P 56 0.1439 117 0.34 94
IV.CSNT.HHZ. 2019-07-17T16:23:22.83 0.1 positive manual P 79 0.1547 115 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHE. ML:1.2 0.0001425 0.2 AML other m 2019-07-17T16:23:25.16
IV.OSSC.HHE. ML:1.3 0.000173 0.5 AML other m 2019-07-17T16:23:25.49
IV.CSNT.HHN. ML:1.4 0.0002095 0.56 AML other m 2019-07-17T16:23:25.08
IV.OSSC.HHN. ML:1.2 0.0001705 0.32 AML other m 2019-07-17T16:23:25.42
IV.FROS.CHE. ML:1.4 0.00012995 0.34 AML other m 2019-07-17T16:23:28.56
IV.FROS.CHN. ML:1.2 8.94E-5 0.34 AML other m 2019-07-17T16:23:28.74
GU.CARD.HHE. ML:1.9 0.0001155 0.06 AML other m 2019-07-17T16:23:52.63
GU.CARD.HHN. ML:1.9 0.0001185 0.16 AML other m 2019-07-17T16:23:55.59
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