Earthquake (quarry blast) with magnitude of Md 1.7 on date 04-08-2016 and time 10:12:32 (Italy) in region 2 km NW Vaglia (FI)

A magnitude Md 1.7 (quarry blast) earthquake occured in region: 2 km NW Vaglia (FI), on

  • 04-08-2016 08:12:32 (UTC)
  • 04-08-2016 10:12:32 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.92, 11.28 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: quarry blast.

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
Vaglia FI 2 5073 5073
Scarperia e San Piero FI 6 12217 17290
Barberino di Mugello FI 9 10836 28126
Borgo San Lorenzo FI 10 18211 46337
Calenzano FI 11 17489 63826
Sesto Fiorentino FI 12 48958 112784
Fiesole FI 13 13969 126753
Vaiano PO 13 9895 136648
Prato PO 15 191150 327798
Vicchio FI 15 8044 335842
Campi Bisenzio FI 16 46166 382008
Firenze FI 17 382808 764816
Vernio PO 18 6060 770876
Cantagallo PO 18 3105 773981
Montemurlo PO 19 18456 792437
Bagno a Ripoli FI 19 25611 818048
Scandicci FI 20 50609 868657

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km E of Prato (191150 inhabitants)
17 Km N of Firenze (382808 inhabitants)
20 Km NE of Scandicci (50609 inhabitants)
29 Km E of Pistoia (90315 inhabitants)
60 Km SW of Imola (69797 inhabitants)
63 Km E of Lucca (89046 inhabitants)
63 Km SW of Faenza (58541 inhabitants)
64 Km S of Bologna (386663 inhabitants)
67 Km N of Siena (53903 inhabitants)
70 Km W of Forlì (117913 inhabitants)
70 Km NW of Arezzo (99543 inhabitants)
74 Km E of Pisa (89158 inhabitants)
81 Km W of Cesena (96758 inhabitants)
82 Km E of Viareggio (62467 inhabitants)
85 Km SE of Modena (184973 inhabitants)
88 Km E of Livorno (159219 inhabitants)
92 Km E of Massa (69479 inhabitants)
92 Km SW of Ravenna (159116 inhabitants)
96 Km E of Carrara (63133 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 Md 1.7 2016-08-04
08:12:32
43.92 11.28 1 2016-08-09
15:06:15
Bollettino Sismico Italiano INGV 26754401
Rev 100 Md 1.4 2016-08-04
08:12:32
43.96 11.25 10 2016-08-04
08:26:55
Sala Sismica INGV-Roma 26695611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2016-08-04 08:12:32 ± 0.16
Latitude 43.92 ± 0.01
Longitude 11.28 ± 0.01
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 26754401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1260
Semi-minor axis of confidence ellipse (meter) 930
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 6
Circular confidence region, given by single value of horizontal uncertainty (meter) 1260
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 123
Number of associated phases, regardless of their use for origin computation 26
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 4.26279
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 6
Magnitudes information

Md:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 2
Type of magnitude Md
Reference to an origin 26695611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2016-08-04 08:26:55

Md:1.7

Field Value
Value 1.7
Uncertainty 0.1
Num. used stations 4
Type of magnitude Md
Reference to an origin 26754401
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2016-08-09 13:14:56
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
CR.STON.BHZ. 2016-08-04T08:14:20.99 3.0 undecidable manual Sn 4.2628 0.24 0
AC.KBN.HHZ. 2016-08-04T08:14:10.45 3.0 positive manual Pn 1 0
IV.HAGA.HHZ. 2016-08-04T08:14:05.59 3.0 negative manual Pn 0.77 0
MN.PDG.HHZ. 2016-08-04T08:13:48.41 3.0 undecidable manual Pn 3.28 0
CR.STON.BHZ. 2016-08-04T08:13:43.26 3.0 undecidable manual Pg 4.2628 15.04 0
IV.SGTA.HNZ. 2016-08-04T08:13:29.36 3.0 undecidable manual Pg 9.69 0
IV.DGI.HHZ. 2016-08-04T08:13:28.59 3.0 negative manual Pg 5.35 0
IV.LEOD.HNZ. 2016-08-04T08:13:26.99 3.0 undecidable manual Sn 2.1404 -1.77 0
IV.LAV9.HHZ. 2016-08-04T08:13:22.99 3.0 undecidable manual Sn -6.26 0
IV.VIVA.HHZ. 2016-08-04T08:13:03.61 3.0 negative manual Pg 4.85 0
IV.LEOD.HNZ. 2016-08-04T08:13:00.06 3.0 positive manual Pn 2.1404 0.95 0
IV.SSM1.HNZ. 2016-08-04T08:13:00.99 3.0 undecidable manual S 0.85 0
IV.TOLF.HHZ. 2016-08-04T08:12:55.44 3.0 undecidable manual Pg 2.05 0
GU.GRAM.HHZ. 2016-08-04T08:12:50.65 3.0 negative manual Pn -0.48 0
IV.COR1.EHZ. 2016-08-04T08:12:47.99 3.0 undecidable manual S 0.7374 -2.74 0
IV.PP3.EHZ. 2016-08-04T08:12:44.45 3.0 negative manual P -2.3 0
IV.FDMO.HHZ. 2016-08-04T08:12:42.48 3.0 undecidable manual P -2.08 0
IV.FNVD.HHZ. 2016-08-04T08:12:39.48 0.6 undecidable manual P 336 0.2689 91 0.5 45
IV.CRMI.HHZ. 2016-08-04T08:12:38.58 0.3 undecidable manual P 239 0.2482 91 0.07 74
IV.RUFI.EHE. 2016-08-04T08:12:37.17 0.3 undecidable manual P 116 0.188 91 -0.01 76
IV.MTCR.EHZ. 2016-08-04T08:12:37.60 0.1 undecidable manual P 298 0.223 91 -0.36 94
IV.MPPT.EHZ. 2016-08-04T08:12:36.19 0.1 undecidable manual P 285 0.1376 92 0.13 100
IV.SEI.HHE. 2016-08-04T08:12:36.14 0.3 undecidable manual P 24 0.1448 92 -0.08 76
IV.CSNT.HHZ. 2016-08-04T08:12:35.10 3.0 negative manual P -0.41 0
IV.COR1.EHZ. 2016-08-04T08:12:34.12 3.0 negative manual P 0.7374 -3.96 0
IV.CRE.HHZ. 2016-08-04T08:12:22.28 3.0 positive manual P -3.68 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.HHE. Md:1.6 15 END duration s
IV.MPPT.EHZ. Md:1.6 17 END duration s
IV.MTCR.EHZ. Md:1.8 19 END duration s
IV.RUFI.EHE. Md:1.8 20 END duration s
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download