Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 08-12-2019 and time 19:38:35 (UTC) in region 6 km N Scarperia e San Piero (FI)

A magnitude ML 1.8 earthquake occured in region: 6 km N Scarperia e San Piero (FI), on

  • 08-12-2019 19:38:35 (UTC)
  • 08-12-2019 20:38:35 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.0200, 11.3170 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
Firenzuola FI 12 4726 45990
Vaglia FI 13 5073 51063
Vernio PO 13 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)
53 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 SE of Modena (184973 inhabitants)
76 Km NW of Arezzo (99543 inhabitants)
78 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)
93 Km SE of Reggio nell'Emilia (171345 inhabitants)
94 Km E of Massa (69479 inhabitants)
94 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 1.8 2019-12-08
19:38:35		 44.0198 11.3168 8 2020-02-28
16:42:12		 Bollettino Sismico Italiano INGV 74486021
Reviewed
Rev100 		ML 1.6 2019-12-08
19:38:35		 44.0383 11.3273 6 2019-12-08
20:07:52		 Sala Sismica INGV-Roma 74441161
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-08 19:38:35 ± 0.08
Latitude 44.0198 ± 0.0045
Longitude 11.3168 ± 0.0050
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 74486021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 431
Semi-minor axis of confidence ellipse (meter) 375
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 211
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 121
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) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.09893
Epicentral distance of station farthest from the epicenter (degree) 0.54679
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:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 9
Type of magnitude ML
Reference to an origin 74441161
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-08 20:07:52

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 74486021
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-02-17 15:17:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSNT.HHZ. 2019-12-08T19:38:55.97 0.6 undecidable manual S 182 60.6948 50 1.02 34
IV.SFI.EHZ. 2019-12-08T19:38:51.18 0.6 undecidable manual S 107 44.2224 50 0.63 41
GU.POPM.HHZ. 2019-12-08T19:38:50.48 0.6 undecidable manual S 274 44.7219 50 -0.21 46
IV.CSNT.HHZ. 2019-12-08T19:38:46.59 0.6 undecidable manual P 182 60.6948 50 -0.17 45
IV.LMD.HHZ. 2019-12-08T19:38:46.90 0.6 undecidable manual S 78 31.746 104 -0.05 49
IV.OSSC.HHZ. 2019-12-08T19:38:45.74 0.1 undecidable manual P 186 55.3002 50 -0.2 91
IV.RUFI.EHZ. 2019-12-08T19:38:44.48 0.6 undecidable manual S 143 25.3524 107 -0.34 47
IV.SFI.EHZ. 2019-12-08T19:38:44.21 0.3 undecidable manual P 107 44.2224 50 -0.01 72
IT.FIE.HGE. 2019-12-08T19:38:44.15 0.6 undecidable manual S 184 23.6541 109 -0.1 49
IV.FNVD.HHZ. 2019-12-08T19:38:43.78 0.6 undecidable manual S 317 22.5552 109 -0.09 49
GU.POPM.HHZ. 2019-12-08T19:38:43.94 0.3 undecidable manual P 274 44.7219 50 -0.37 67
IV.LMD.HHZ. 2019-12-08T19:38:42.04 0.3 undecidable manual P 78 31.746 104 -0.11 73
IV.MPPT.EHZ. 2019-12-08T19:38:42.74 0.6 undecidable manual S 249 19.3695 112 -0.1 50
IV.CRMI.HNN. 2019-12-08T19:38:42.86 0.3 undecidable manual P 227 36.6411 50 -0.2 71
IV.MOCL.EHZ. 2019-12-08T19:38:40.44 0.3 undecidable manual S 261 10.9779 126 0.15 75
IT.FIE.HGE. 2019-12-08T19:38:40.49 0.1 undecidable manual P 184 23.6541 109 -0.09 99
IV.FNVD.HHZ. 2019-12-08T19:38:40.49 0.1 undecidable manual P 317 22.5552 109 0.12 98
IV.RUFI.EHZ. 2019-12-08T19:38:40.91 0.1 positive manual P 143 25.3524 107 -0.01 100
IV.MPPT.EHZ. 2019-12-08T19:38:39.91 0.1 undecidable manual P 249 19.3695 112 0.13 99
IV.MOCL.EHZ. 2019-12-08T19:38:38.61 0.1 negative manual P 261 10.9779 126 0.31 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOCL.EHN. ML:2.2 0.0023169630000000004 0.192 AML other m 2019-12-08T19:38:45.56
IV.MOCL.EHE. ML:1.9 0.0011621173 0.128 AML other m 2019-12-08T19:38:45.38
IV.MPPT.EHN. ML:1.7 0.00043689015 0.2944 AML other m 2019-12-08T19:38:48.31
IV.MPPT.EHE. ML:1.7 0.0003690226 0.1792 AML other m 2019-12-08T19:38:47.70
IV.FNVD.HHE. ML:1.6 0.0002653191 0.1024 AML other m 2019-12-08T19:38:49.00
IV.FNVD.HHN. ML:1.7 0.00035314369999999996 0.128 AML other m 2019-12-08T19:38:50.20
IV.RUFI.EHE. ML:1.4 0.00014507225000000003 0.1792 AML other m 2019-12-08T19:38:50.12
IV.RUFI.EHN. ML:1.2 0.00009236711 0.2688 AML other m 2019-12-08T19:38:49.56
IV.LMD.HHN. ML:1.9 0.00040506595 0.2432 AML other m 2019-12-08T19:38:51.97
IV.LMD.HHE. ML:1.7 0.00023367695 0.2816 AML other m 2019-12-08T19:38:53.54
GU.POPM.HHN. ML:2.2 0.00042327040000000003 0.1664 AML other m 2019-12-08T19:38:55.90
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