INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of ML 1.1 on date 12-10-2018 and time 10:54:37 (Italy) in region 4 km N Borgo San Lorenzo (FI)

A magnitude ML 1.1 earthquake occured in region: 4 km N Borgo San Lorenzo (FI), on

  • 12-10-2018 08:54:37 (UTC)
  • 12-10-2018 10:54:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.99, 11.4 at 8 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 6 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 19 1154 65776
San Godenzo FI 19 1167 66943
Rufina FI 19 7346 74289
Londa FI 20 1840 76129

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)
73 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
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.1 2018-10-12
08:54:37
43.99 11.4 8 2018-10-12
09:02:06
Sala Sismica INGV-Roma 61870611
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-10-12 08:54:37 ± 0.07
Latitude 43.99 ± 0.01
Longitude 11.40 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 61870611

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 580
Semi-minor axis of confidence ellipse (meter) 408
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 206
Circular confidence region, given by single value of horizontal uncertainty (meter) 580
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 111
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 19
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
Epicentral distance of station farthest from the epicenter (degree) 0.34174
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 61870611
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-10-12 09:02:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ASQU.HHZ. 2018-10-12T08:54:51.10 0.3 undecidable manual S 124 0.3417 50 0.04 73
IV.MNTV.HNZ. 2018-10-12T08:54:51.57 3.0 undecidable manual P -0.03 0
IV.SFI.EHZ. 2018-10-12T08:54:50.72 0.3 undecidable manual S 104 0.3345 50 -0.14 71
IV.MTCR.EHZ. 2018-10-12T08:54:48.79 0.6 undecidable manual S 278 0.286 104 -0.39 46
IV.FNVD.HHN. 2018-10-12T08:54:48.40 0.6 undecidable manual S 313 0.2662 105 -0.06 49
IV.LMD.HHZ. 2018-10-12T08:54:47.32 0.6 undecidable manual S 68 0.241 107 -0.21 48
IV.MPPT.EHZ. 2018-10-12T08:54:46.76 0.3 undecidable manual S 262 0.2212 108 -0.05 74
IV.ASQU.HHZ. 2018-10-12T08:54:45.40 0.1 undecidable manual P 124 0.3417 50 -0.06 97
IV.RUFI.EHZ. 2018-10-12T08:54:45.29 0.6 undecidable manual S 151 0.17 113 0.34 47
IV.MTRZ.HHZ. 2018-10-12T08:54:45.93 0.1 undecidable manual P 4 0.3265 50 0.73 81
IV.SFI.EHZ. 2018-10-12T08:54:45.13 0.1 undecidable manual P 104 0.3345 50 -0.22 94
IV.MOCL.EHZ. 2018-10-12T08:54:44.48 0.3 undecidable manual S 277 0.1556 115 0.04 76
IV.MTCR.EHZ. 2018-10-12T08:54:44.08 0.3 undecidable manual P 278 0.286 104 -0.3 70
IV.LMD.HHZ. 2018-10-12T08:54:43.19 0.1 undecidable manual P 68 0.241 107 -0.24 95
IV.MPPT.EHZ. 2018-10-12T08:54:43.04 0.1 positive manual P 262 0.2212 108 0.03 100
IV.FNVD.HHN. 2018-10-12T08:54:43.71 0.1 undecidable manual P 313 0.2662 105 -0.25 94
IV.RUFI.EHZ. 2018-10-12T08:54:42.22 0.6 negative manual P 151 0.17 113 0.28 48
IV.MOCL.EHZ. 2018-10-12T08:54:41.85 0.1 negative manual P 277 0.1556 115 0.21 97
IV.SEI.HHZ. 2018-10-12T08:54:41.91 0.6 undecidable manual S 338 0.0719 135 0.13 50
IV.SEI.HHZ. 2018-10-12T08:54:40.26 0.1 undecidable manual P 338 0.0719 135 0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.LMD.HHE. ML:1 6.17E-5 0.6 AML other m 2018-10-12T08:54:49.86
IV.SEI.HHN. ML:1.7 0.000809 0.38 AML other m 2018-10-12T08:54:42.00
IV.MOCL.EHN. ML:1.4 0.00024 0.5 AML other m 2018-10-12T08:54:44.81
IV.MOCL.EHE. ML:1.4 0.0002295 0.14 AML other m 2018-10-12T08:54:44.88
IV.MPPT.EHE. ML:0.8 4.075E-5 1.22 AML other m 2018-10-12T08:54:46.25
IV.LMD.HHN. ML:1.2 8.665E-5 0.16 AML other m 2018-10-12T08:54:47.41
IV.MPPT.EHN. ML:1 5.545E-5 1.28 AML other m 2018-10-12T08:54:47.02
IV.SEI.HHE. ML:1.3 0.0003315 0.66 AML other m 2018-10-12T08:54:42.44
IV.MTCR.EHN. ML:0.9 3.84541445E-5 0.4608 AML other m 2018-10-12T08:54:48.96
IV.MTCR.EHE. ML:0.7 2.53544315E-5 0.1984 AML other m 2018-10-12T08:54:53.37
IV.SFI.EHN. ML:1 3.867854E-5 0.2048 AML other m 2018-10-12T08:54:51.32
IV.SFI.EHE. ML:1 3.2720835E-5 0.16 AML other m 2018-10-12T08:54:51.38
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