Earthquake with magnitude of ML 0.8 on date 16-10-2018 and time 01:04:31 (Italy) in region 4 km N Borgo San Lorenzo (FI)

A magnitude ML 0.8 earthquake occured in region: 4 km N Borgo San Lorenzo (FI), on

  • 15-10-2018 23:04:31 (UTC)
  • 16-10-2018 01:04:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.99, 11.4 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Borgo San Lorenzo FI 4 18211 18211
Scarperia e San Piero FI 7 12217 30428
Vicchio FI 8 8044 38472
Barberino di Mugello FI 13 10836 49308
Vaglia FI 13 5073 54381
Firenzuola FI 15 4726 59107
Dicomano FI 15 5515 64622
Palazzuolo sul Senio FI 18 1154 65776
San Godenzo FI 19 1167 66943
Rufina FI 19 7346 74289
Londa FI 20 1840 76129
Marradi FI 20 3139 79268

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km E of Prato (191150 inhabitants)
27 Km NE of Firenze (382808 inhabitants)
31 Km NE of Scandicci (50609 inhabitants)
39 Km E of Pistoia (90315 inhabitants)
48 Km SW of Imola (69797 inhabitants)
51 Km SW of Faenza (58541 inhabitants)
57 Km S of Bologna (386663 inhabitants)
58 Km W of Forlì (117913 inhabitants)
70 Km W of Cesena (96758 inhabitants)
70 Km NW of Arezzo (99543 inhabitants)
74 Km E of Lucca (89046 inhabitants)
75 Km N of Siena (53903 inhabitants)
80 Km SW of Ravenna (159116 inhabitants)
82 Km SE of Modena (184973 inhabitants)
85 Km E of Pisa (89158 inhabitants)
93 Km E of Viareggio (62467 inhabitants)
94 Km W of Rimini (147750 inhabitants)
96 Km S of Ferrara (133155 inhabitants)
97 Km SE of Carpi (70699 inhabitants)
100 Km SE of Reggio nell'Emilia (171345 inhabitants)
100 Km E of Livorno (159219 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 0.8 2018-10-15
23:04:31
43.99 11.4 9 2019-06-04
09:16:00
Bollettino Sismico Italiano INGV 62869141
Rev 100 ML 1.0 2018-10-15
23:04:31
43.99 11.4 8 2018-10-15
23:10:01
Sala Sismica INGV-Roma 61981331
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-10-15 23:04:31 ± 0.07
Latitude 43.99 ± 0.01
Longitude 11.40 ± 0.01
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 62869141

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 511
Semi-minor axis of confidence ellipse (meter) 410
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 357
Circular confidence region, given by single value of horizontal uncertainty (meter) 510
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 91
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.35793
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 62869141
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2018-11-07 17:11:33

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 61981331
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-10-15 23:10:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CSNT.HHZ. 2018-10-15T23:04:49.98 3.0 undecidable manual P 0
IV.SFI.EHZ. 2018-10-15T23:04:44.17 0.6 undecidable manual S 104 0.3336 50 0.07 48
IV.LMD.HHZ. 2018-10-15T23:04:40.84 0.6 undecidable manual S 68 0.2392 108 -0.06 49
IV.CRMI.HNN. 2018-10-15T23:04:38.98 0.1 undecidable manual P 238 0.3579 50 -0.1 96
IV.SFI.EHZ. 2018-10-15T23:04:38.72 0.1 undecidable manual P 104 0.3336 50 0.06 97
IV.FNVD.HHZ. 2018-10-15T23:04:37.19 0.3 undecidable manual P 312 0.2671 106 -0.21 71
IV.MOCL.EHZ. 2018-10-15T23:04:37.79 0.6 undecidable manual S 276 0.1574 116 -0.18 49
IV.RUFI.EHZ. 2018-10-15T23:04:37.97 0.6 undecidable manual S 152 0.17 114 -0.46 46
IV.MTCR.EHZ. 2018-10-15T23:04:37.74 0.3 undecidable manual P 278 0.2869 105 -0.09 73
IV.LMD.HHZ. 2018-10-15T23:04:36.65 0.1 undecidable manual P 68 0.2392 108 -0.16 97
IV.MOCL.EHZ. 2018-10-15T23:04:35.36 0.1 undecidable manual P 276 0.1574 116 0.24 97
IV.RUFI.EHZ. 2018-10-15T23:04:35.70 0.1 undecidable manual P 152 0.17 114 0.32 95
IV.SEI.HHZ. 2018-10-15T23:04:35.31 0.6 undecidable manual S 337 0.0719 137 0.02 51
IV.SEI.HHZ. 2018-10-15T23:04:33.72 0.1 undecidable manual P 337 0.0719 137 0.15 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MOCL.EHE. ML:1.1 0.0001215 0.16 AML other m 2018-10-15T23:04:40.49
IV.SEI.HHE. ML:0.7 8.647566E-5 0.2816 AML other m 2018-10-15T23:04:35.56
IV.SEI.HHN. ML:0.9 0.0001295021 0.2432 AML other m 2018-10-15T23:04:39.24
IV.LMD.HHN. ML:0.6 2.519871E-5 0.1408 AML other m 2018-10-15T23:04:43.31
IV.LMD.HHE. ML:0.4 1.4548685E-5 0.1408 AML other m 2018-10-15T23:04:43.30
IV.SFI.EHN. ML:0.6 1.5821204E-5 0.1664 AML other m 2018-10-15T23:04:47.07
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