Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 09-12-2019 and time 12:58:33 (Italy) in region 6 km N Scarperia e San Piero (FI)

A magnitude ML 0.9 earthquake occured in region: 6 km N Scarperia e San Piero (FI), on

  • 09-12-2019 11:58:33 (UTC)
  • 09-12-2019 12:58:33 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0140, 11.3200 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.

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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
Scarperia e San Piero FI 6 12217 12217
Barberino di Mugello FI 7 10836 23053
Borgo San Lorenzo FI 9 18211 41264
Vaglia FI 12 5073 46337
Firenzuola FI 13 4726 51063
Vernio PO 14 6060 57123
Vicchio FI 15 8044 65167
Vaiano PO 16 9895 75062
Cantagallo PO 17 3105 78167
Castiglione dei Pepoli BO 19 5648 83815

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NE of Prato (191150 inhabitants)
28 Km N of Firenze (382808 inhabitants)
31 Km NE of Scandicci (50609 inhabitants)
33 Km E of Pistoia (90315 inhabitants)
49 Km SW of Imola (69797 inhabitants)
54 Km S of Bologna (386663 inhabitants)
54 Km SW of Faenza (58541 inhabitants)
62 Km W of Forlì (117913 inhabitants)
68 Km E of Lucca (89046 inhabitants)
75 Km W of Cesena (96758 inhabitants)
76 Km NW of Arezzo (99543 inhabitants)
77 Km SE of Modena (184973 inhabitants)
77 Km N of Siena (53903 inhabitants)
81 Km E of Pisa (89158 inhabitants)
83 Km SW of Ravenna (159116 inhabitants)
87 Km E of Viareggio (62467 inhabitants)
92 Km SE of Carpi (70699 inhabitants)
94 Km SE of Reggio nell'Emilia (171345 inhabitants)
94 Km E of Massa (69479 inhabitants)
95 Km S of Ferrara (133155 inhabitants)
96 Km NE of Livorno (159219 inhabitants)
98 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
Bulletin
Rev1000 		ML 0.9 2019-12-09
11:58:33		 44.0145 11.32 8 2020-02-28
16:42:25		 Bollettino Sismico Italiano INGV 76486671
Reviewed
Rev100 		ML 1.1 2019-12-09
11:58:33		 44.0133 11.3188 8 2019-12-09
12:07:06		 Sala Sismica INGV-Roma 74480451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-09 11:58:33 ± 0.05
Latitude 44.0145 ± 0.0036
Longitude 11.3200 ± 0.0038
Depth (km) 8 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 76486671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 364
Semi-minor axis of confidence ellipse (meter) 211
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 10
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 78
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.52251
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 74480451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-09 12:07:06

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 2
Type of magnitude ML
Reference to an origin 76486671
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-13 12:45:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PAOL.HHZ. 2019-12-09T12:00:13.68 3.0 undecidable manual Sn 0.47 0
IV.MTGR.HHZ. 2019-12-09T12:00:10.13 3.0 undecidable manual Pg 11.46 0
IV.ORI.HHZ. 2019-12-09T12:00:05.28 3.0 negative manual Pg 19.68 0
IV.ECTS.EHZ. 2019-12-09T12:00:01.87 3.0 negative manual Pn -3.23 0
IV.PAOL.HHZ. 2019-12-09T11:59:38.33 3.0 positive manual Pg 14.77 0
ZM.T1368.EHZ. 2019-12-09T11:59:37.72 3.0 undecidable manual Pg 13.29 0
IV.MRB1.HHZ. 2019-12-09T11:59:23.56 3.0 undecidable manual Pn -1.15 0
SI.KOSI.HHZ. 2019-12-09T11:59:09.63 3.0 undecidable manual Sn -1.01 0
IV.MNTT.EHZ. 2019-12-09T11:59:03.87 3.0 positive manual Pg 8.47 0
IV.VIVA.HHZ. 2019-12-09T11:59:02.87 3.0 negative manual Pn -4.24 0
IT.RMVT.HGZ. 2019-12-09T11:59:00.98 3.0 undecidable manual Pn -2.68 0
IV.EL6.EHZ. 2019-12-09T11:58:55.21 3.0 undecidable manual Pg 5.62 0
IV.SARZ.HHZ. 2019-12-09T11:58:53.26 3.0 positive manual Pg 3.28 0
IV.BDI.HNZ. 2019-12-09T11:58:51.92 0.6 undecidable manual S 276 57.9975 50 -0.02 47
IV.OSSC.HNE. 2019-12-09T11:58:51.27 0.6 undecidable manual S 186 54.8007 50 0.19 45
GU.POPM.HHZ. 2019-12-09T11:58:48.40 0.6 undecidable manual S 275 45.0216 50 -0.08 47
IV.SENI.HNZ. 2019-12-09T11:58:46.57 3.0 undecidable manual Pn -0.36 0
IV.EUCT.HNZ. 2019-12-09T11:58:45.60 3.0 positive manual Pn -3.02 0
IV.LMD.HHE. 2019-12-09T11:58:44.70 0.3 undecidable manual S 77 31.6461 104 0.01 73
IV.BDI.HNZ. 2019-12-09T11:58:43.71 0.3 undecidable manual P 276 57.9975 50 -0.37 65
IV.OSSC.HNE. 2019-12-09T11:58:43.65 0.3 undecidable manual P 186 54.8007 50 0.06 70
IV.FNVD.HHZ. 2019-12-09T11:58:42.18 0.6 undecidable manual S 317 23.1546 109 0.32 47
IV.RUFI.EHZ. 2019-12-09T11:58:42.24 0.6 undecidable manual S 142 24.753 108 -0.14 48
GU.POPM.HHZ. 2019-12-09T11:58:42.45 0.6 undecidable manual P 275 45.0216 50 0.37 44
IV.MPPT.EHN. 2019-12-09T11:58:40.49 0.3 undecidable manual S 251 19.3695 113 -0.15 73
IV.LMD.HHE. 2019-12-09T11:58:39.67 0.1 undecidable manual P 77 31.6461 104 -0.22 94
IV.MOCL.EHZ. 2019-12-09T11:58:38.00 0.3 undecidable manual S 265 11.1777 126 -0.13 74
IV.FNVD.HHZ. 2019-12-09T11:58:38.10 0.3 undecidable manual P 317 23.1546 109 -0.16 72
IV.RUFI.EHZ. 2019-12-09T11:58:38.67 0.1 undecidable manual P 142 24.753 108 0.11 97
IV.MPPT.EHN. 2019-12-09T11:58:37.63 0.1 undecidable manual P 251 19.3695 113 0.07 99
IV.MOCL.EHZ. 2019-12-09T11:58:36.24 0.1 undecidable manual P 265 11.1777 126 0.13 99
IV.SEI.HHZ. 2019-12-09T11:58:36.71 0.3 undecidable manual S 35 5.3946 146 -0.01 77
IV.SEI.HHZ. 2019-12-09T11:58:35.43 0.1 undecidable manual P 35 5.3946 146 0.13 100
IV.CAVE.HHZ. 2019-12-09T11:58:35.19 3.0 negative manual P 2.2 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.HHN. ML:0.0 0.0003395494 0.2944 AML other m 2019-12-09T11:58:39.06
IV.SEI.HHE. ML:0.0 0.00019954330000000002 0.1216 AML other m 2019-12-09T11:58:37.17
IV.MOCL.EHN. ML:1.1 0.00017561294999999998 0.1408 AML other m 2019-12-09T11:58:38.33
IV.MOCL.EHE. ML:0.7 0.000060391444999999996 0.1152 AML other m 2019-12-09T11:58:38.07
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 not available