Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 09-02-2017 and time 05:21:17 (UTC) in region 2 km NE Sovicille (SI)

A magnitude ML 2.1 earthquake occured in region: 2 km NE Sovicille (SI), on

  • 09-02-2017 05:21:17 (UTC)
  • 09-02-2017 06:21:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.2910, 11.2470 at 9 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sovicille SI 2 10116 10116
Siena SI 8 53903 64019
Monteriggioni SI 12 9810 73829
Monteroni d'Arbia SI 16 9088 82917
Radicondoli SI 17 914 83831
Casole d'Elsa SI 17 3897 87728
Monticiano SI 18 1571 89299
Murlo SI 18 2389 91688
Colle di Val d'Elsa SI 18 21620 113308
Chiusdino SI 20 1903 115211

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km W of Siena (53903 inhabitants)
52 Km S of Scandicci (50609 inhabitants)
53 Km S of Firenze (382808 inhabitants)
55 Km W of Arezzo (99543 inhabitants)
60 Km N of Grosseto (82087 inhabitants)
67 Km S of Prato (191150 inhabitants)
76 Km SE of Pistoia (90315 inhabitants)
81 Km E of Livorno (159219 inhabitants)
83 Km SE of Pisa (89158 inhabitants)
86 Km SE of Lucca (89046 inhabitants)
95 Km W of Perugia (166134 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
Bulletin
Rev1000 		ML 2.1 2017-02-09
05:21:17		 43.2908 11.2468 9 2018-01-10
09:51:18		 Bollettino Sismico Italiano INGV 50527541
Reviewed
Rev100 		ML 2.1 2017-02-09
05:21:17		 43.2898 11.2472 9 2017-02-09
05:28:21		 Sala Sismica INGV-Roma 40759631
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-02-09 05:21:17 ± 0.1
Latitude 43.2908 ± 0.0045
Longitude 11.2468 ± 0.0111
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 50527541

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 857
Semi-minor axis of confidence ellipse (meter) 359
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 292
Circular confidence region, given by single value of horizontal uncertainty (meter) 860.0
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 20
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0.10432
Epicentral distance of station farthest from the epicenter (degree) 0.60075
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 50527541
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-09-28 15:51:20

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 7
Type of magnitude ML
Reference to an origin 40759631
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-02-09 05:28:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RUFI.EHZ. 2017-02-09T05:21:37.90 0.1 undecidable manual S 19 64.2912 50 0.18 88
TV.SF04.EHZ. 2017-02-09T05:21:37.30 0.3 undecidable manual S 146 60.5949 50 0.56 61
IV.CASP.HHZ. 2017-02-09T05:21:37.22 0.3 undecidable manual S 209 63.492 50 -0.3 65
TV.SF01.EHZ. 2017-02-09T05:21:36.71 0.3 undecidable manual S 154 58.9965 50 0.4 64
IV.CAFI.HHZ. 2017-02-09T05:21:35.21 0.3 undecidable manual S 86 58.1973 50 -0.89 53
IV.MCIV.HHZ. 2017-02-09T05:21:29.28 0.3 undecidable manual P 148 66.6777 50 -0.32 64
IV.CRMI.HNN. 2017-02-09T05:21:29.15 0.3 undecidable manual P 339 59.9955 50 0.57 61
IV.TRIF.HHZ. 2017-02-09T05:21:29.00 0.1 undecidable manual S 235 34.0437 50 -0.64 82
IV.RUFI.EHZ. 2017-02-09T05:21:29.56 0.1 undecidable manual P 19 64.2912 50 0.33 86
IV.CASP.HHZ. 2017-02-09T05:21:29.65 0.3 undecidable manual P 209 63.492 50 0.53 61
IV.CAFI.HHZ. 2017-02-09T05:21:28.13 0.3 undecidable manual P 86 58.1973 50 -0.17 67
TV.SF01.EHZ. 2017-02-09T05:21:28.57 0.3 undecidable manual P 154 58.9965 50 0.15 67
TV.SF04.EHZ. 2017-02-09T05:21:28.43 0.3 undecidable manual P 146 60.5949 50 -0.24 66
IV.OSSC.HHZ. 2017-02-09T05:21:27.20 0.3 undecidable manual S 360 25.8519 109 0.07 73
IV.CSNT.HHZ. 2017-02-09T05:21:25.26 0.1 undecidable manual S 10 20.5683 114 -0.16 96
IV.TRIF.HHZ. 2017-02-09T05:21:24.70 0.3 undecidable manual P 235 34.0437 50 0.13 71
IV.CSNT.HHZ. 2017-02-09T05:21:22.03 0.1 positive manual P 10 20.5683 114 -0.1 97
IV.OSSC.HHZ. 2017-02-09T05:21:22.99 0.1 positive manual P 360 25.8519 109 -0.13 96
IV.FROS.HHZ. 2017-02-09T05:21:22.77 0.1 undecidable manual S 219 11.5773 128 0.03 100
IV.FROS.HHZ. 2017-02-09T05:21:20.68 0.1 positive manual P 219 11.5773 128 0.09 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.HHN. ML:2.3 0.002525 0.18 AML other m 2017-02-09T05:21:23.44
IV.FROS.HHE. ML:2.5 0.0037749999999999997 0.44 AML other m 2017-02-09T05:21:23.89
IV.CSNT.HHE. ML:2.0 0.0007564999999999999 0.36 AML other m 2017-02-09T05:21:25.58
IV.CSNT.HHN. ML:2.0 0.0006839999999999999 0.32 AML other m 2017-02-09T05:21:26.66
IV.OSSC.HHN. ML:1.8 0.00039200000000000004 1.26 AML other m 2017-02-09T05:21:27.00
IV.OSSC.HNE. ML:1.8 0.00037 0.58 AML other m 2017-02-09T05:21:27.34
IV.OSSC.HNN. ML:1.9 0.0005105 1.6 AML other m 2017-02-09T05:21:27.03
IV.OSSC.HHE. ML:1.9 0.000535 1.6 AML other m 2017-02-09T05:21:28.84
IV.TRIF.HHN. ML:2.2 0.0006910000000000001 0.4 AML other m 2017-02-09T05:21:29.73
IV.TRIF.HHE. ML:2.4 0.001195 0.22 AML other m 2017-02-09T05:21:29.77
IV.CAFI.HHN. ML:2.1 0.000279 0.92 AML other m 2017-02-09T05:21:35.71
IV.CAFI.HNE. ML:2.0 0.00021250000000000002 0.24 AML other m 2017-02-09T05:21:35.70
IV.CAFI.HHE. ML:2.0 0.00022749999999999997 0.24 AML other m 2017-02-09T05:21:35.82
IV.CAFI.HNN. ML:2.0 0.00023349999999999998 0.24 AML other m 2017-02-09T05:21:36.40
TV.SF01.EHN. ML:2.4 0.0005344999999999999 0.28 AML other m 2017-02-09T05:21:37.45
TV.SF01.EHE. ML:2.4 0.0005605 1.08 AML other m 2017-02-09T05:21:37.44
TV.SF04.EHE. ML:2.3 0.0004195 0.2 AML other m 2017-02-09T05:21:38.01
TV.SF04.EHN. ML:2.3 0.00038349999999999994 0.2 AML other m 2017-02-09T05:21:39.79
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download