Earthquake with magnitude of ML 1.8 on date 08-07-2019 and time 22:39:57 (Italy) in region 3 km NW Colle di Val d'Elsa (SI)

A magnitude ML 1.8 earthquake occured in region: 3 km NW Colle di Val d'Elsa (SI), on

  • 08-07-2019 20:39:57 (UTC)
  • 08-07-2019 22:39:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.45, 11.1 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.

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 3 21620 21620
Poggibonsi SI 4 29196 50816
San Gimignano SI 5 7820 58636
Monteriggioni SI 11 9810 68446
Barberino Val d'Elsa FI 12 4386 72832
Certaldo FI 12 16121 88953
Casole d'Elsa SI 13 3897 92850
Tavarnelle Val di Pesa FI 14 7800 100650
Castellina in Chianti SI 15 2859 103509
Gambassi Terme FI 16 4870 108379
Montaione FI 19 3700 112079

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NW of Siena (53903 inhabitants)
35 Km S of Scandicci (50609 inhabitants)
38 Km SW of Firenze (382808 inhabitants)
48 Km S of Prato (191150 inhabitants)
56 Km S of Pistoia (90315 inhabitants)
63 Km W of Arezzo (99543 inhabitants)
64 Km E of Pisa (89158 inhabitants)
65 Km E of Livorno (159219 inhabitants)
66 Km SE of Lucca (89046 inhabitants)
76 Km N of Grosseto (82087 inhabitants)
83 Km SE 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
Rev 1000 ML 1.8 2019-07-08
20:39:57
43.45 11.1 8 2019-11-13
14:30:54
Bollettino Sismico Italiano INGV 70493851
Rev 100 ML 1.8 2019-07-08
20:39:57
43.44 11.16 9 2019-07-08
20:53:51
Sala Sismica INGV-Roma 70384051
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-07-08 20:39:57 ± 0.13
Latitude 43.45 ± 0.01
Longitude 11.10 ± 0.01
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 70493851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 789
Semi-minor axis of confidence ellipse (meter) 615
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) 790
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 119
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 5.91394
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 70493851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-07-12 08:14:18

ML:1.8

Field Value
Value 1.8
Uncertainty 0.1
Num. used stations 10
Type of magnitude ML
Reference to an origin 70384051
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-07-08 20:53:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IT.FIE.HGZ. 2019-07-08T20:40:57.82 3.0 undecidable manual Sg 6.82 0
IV.EUCT.HNZ. 2019-07-08T20:40:23.98 1.0 undecidable manual P 2.2546 -9.99 0
IV.RIBO.EHZ.01 2019-07-08T20:40:14.81 0.3 undecidable manual S 185 0.4946 50 -0.01 70
IV.RUFI.EHZ. 2019-07-08T20:40:14.72 0.1 undecidable manual S 37 0.4937 50 -0.06 93
IV.PII.HHZ. 2019-07-08T20:40:14.80 0.3 undecidable manual S 304 0.5036 50 -0.28 66
IV.SFI.EHZ. 2019-07-08T20:40:11.65 1.0 undecidable manual P 49 0.7096 50 0.64 19
IV.RUFI.EHZ. 2019-07-08T20:40:07.44 0.1 negative manual P 37 0.4937 50 0.13 91
IV.RIBO.EHZ.01 2019-07-08T20:40:07.34 0.6 undecidable manual P 185 0.4946 50 0.01 47
IV.PII.HHZ. 2019-07-08T20:40:07.51 0.6 undecidable manual P 304 0.5036 50 0.03 46
IV.CSNT.HHZ. 2019-07-08T20:40:02.80 0.1 undecidable manual S 79 0.1394 118 -0.4 93
IV.OSSC.HHZ. 2019-07-08T20:40:02.98 0.1 undecidable manual S 53 0.1322 120 0.03 100
IV.CSNT.HHZ. 2019-07-08T20:40:00.69 0.1 negative manual P 79 0.1394 118 0.07 99
IV.OSSC.HHZ. 2019-07-08T20:40:00.74 0.1 positive manual P 53 0.1322 120 0.27 95
IV.FROS.CHZ. 2019-07-08T20:39:59.70 3.0 positive manual Pn -0.35 0
IV.PLLN.EHZ. 2019-07-08T20:39:58.19 3.0 negative manual P 5.9139 -9.99 0
CR.STON.BHZ. 2019-07-08T20:39:48.30 3.0 undecidable manual P 4.841 -9.99 0
CR.HVAR.HHZ. 2019-07-08T20:39:41.60 3.0 undecidable manual P 3.8959 -9.99 0
IV.CMPR.HHZ. 2019-07-08T20:39:30.01 3.0 undecidable manual S 4.4166 -9.99 0
IV.TDS.HHZ. 2019-07-08T20:39:28.22 3.0 undecidable manual P 5.44 -9.99 0
OT.OT14.EHZ. 2019-07-08T20:39:19.14 3.0 undecidable manual P 3.8527 -9.99 0
IV.CMPR.HHZ. 2019-07-08T20:39:17.15 3.0 undecidable manual P 4.4166 -9.99 0
IT.VNF1.HGZ. 2019-07-08T20:39:16.79 3.0 positive manual P 2.9264 -9.99 0
IV.PAOL.HHZ. 2019-07-08T20:39:09.81 3.0 undecidable manual P 3.5181 -9.99 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHE. ML:1.8 0.000684 0.1 AML other m 2019-07-08T20:40:03.07
IV.CSNT.HHN. ML:1.9 0.000874 1.44 AML other m 2019-07-08T20:40:03.95
IV.FROS.CHE. ML:1.9 0.0004585 0.3 AML other m 2019-07-08T20:40:03.25
IV.OSSC.HHE. ML:1.8 0.000611 0.46 AML other m 2019-07-08T20:40:03.48
IV.OSSC.HHN. ML:2 0.0010045 0.38 AML other m 2019-07-08T20:40:03.27
IV.OSSC.HNE. ML:2 0.001009 0.4 AML other m 2019-07-08T20:40:03.27
IV.OSSC.HNN. ML:1.7 0.0005805 0.78 AML other m 2019-07-08T20:40:03.48
IV.FROS.CHN. ML:1.8 0.0003305 1.1 AML other m 2019-07-08T20:40:03.06
IV.RUFI.EHN. ML:1.6 8.3302885E-5 0.256 AML other m 2019-07-08T20:40:14.85
IV.RUFI.EHE. ML:1.7 0.00012218368 1.6928 AML other m 2019-07-08T20:40:15.98
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