Earthquake with magnitude of ML 1.3 on date 17-11-2021 and time 03:46:17 (UTC) in region 6 km SE Firenzuola (FI)

A magnitude ML 1.3 earthquake occured in region: 6 km SE Firenzuola (FI), on

  • 17-11-2021 03:46:17 (UTC)
  • 17-11-2021 04:46:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.073, 11.418 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
Firenzuola FI 6 4726 4726
Palazzuolo sul Senio FI 11 1154 5880
Borgo San Lorenzo FI 13 18211 24091
Scarperia e San Piero FI 14 12217 36308
Marradi FI 16 3139 39447
Vicchio FI 16 8044 47491
Barberino di Mugello FI 16 10836 58327
Castel del Rio BO 17 1246 59573
Monghidoro BO 18 3749 63322

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km NE of Prato (191150 inhabitants)
36 Km NE of Firenze (382808 inhabitants)
39 Km SW of Imola (69797 inhabitants)
40 Km NE of Scandicci (50609 inhabitants)
43 Km E of Pistoia (90315 inhabitants)
44 Km SW of Faenza (58541 inhabitants)
47 Km S of Bologna (386663 inhabitants)
53 Km W of Forlì (117913 inhabitants)
66 Km W of Cesena (96758 inhabitants)
73 Km SW of Ravenna (159116 inhabitants)
75 Km SE of Modena (184973 inhabitants)
77 Km NW of Arezzo (99543 inhabitants)
78 Km E of Lucca (89046 inhabitants)
84 Km N of Siena (53903 inhabitants)
87 Km S of Ferrara (133155 inhabitants)
90 Km SE of Carpi (70699 inhabitants)
91 Km E of Pisa (89158 inhabitants)
92 Km W of Rimini (147750 inhabitants)
94 Km SE of Reggio nell'Emilia (171345 inhabitants)
96 Km E of Viareggio (62467 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 1.3 2021-11-17
03:46:17
44.0727 11.4178 8 2021-11-17
03:59:08
Sala Sismica INGV-Roma 97506961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-17 03:46:17 ± 0.07
Latitude 44.0727 ± 0.0036
Longitude 11.4178 ± 0.0050
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 97506961

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 375
Semi-minor axis of confidence ellipse (meter) 265
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 186
Circular confidence region, given by single value of horizontal uncertainty (meter) 370
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 67
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.04676
Epicentral distance of station farthest from the epicenter (degree) 0.47574
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.4
Num. used stations 6
Type of magnitude ML
Reference to an origin 97506961
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-17 03:59:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.POPM.HHZ. 2021-11-17T03:46:34.25 0.3 undecidable manual S 267 0.4757 50 0.05 69
IV.ASQU.HHE. 2021-11-17T03:46:31.35 0.3 undecidable manual S 136 0.384 50 -0.14 69
IV.SFI.EHZ. 2021-11-17T03:46:30.51 0.3 undecidable manual S 118 0.3507 50 0 72
IV.BRIS.HHZ. 2021-11-17T03:46:29.18 0.3 undecidable manual S 59 0.2923 104 0.5 65
IV.MPPT.EHE. 2021-11-17T03:46:27.25 0.3 undecidable manual S 244 0.2617 106 -0.3 69
IV.FNVD.HHE. 2021-11-17T03:46:26.52 0.3 undecidable manual S 294 0.232 108 0.08 72
GU.POPM.HHZ. 2021-11-17T03:46:26.86 0.1 undecidable manual P 267 0.4757 50 -0.09 92
IV.RUFI.EHZ. 2021-11-17T03:46:26.74 0.3 undecidable manual S 164 0.2437 107 -0.13 71
IV.ASQU.HHE. 2021-11-17T03:46:25.30 0.1 undecidable manual P 136 0.384 50 -0.08 93
IV.LMD.HHZ. 2021-11-17T03:46:25.41 0.3 undecidable manual S 89 0.2077 110 -0.15 72
IV.MOCL.EHZ. 2021-11-17T03:46:24.68 0.3 undecidable manual S 248 0.1835 112 0 74
IV.SFI.EHZ. 2021-11-17T03:46:24.61 0.1 undecidable manual P 118 0.3507 50 -0.21 92
IV.BOSL.HHZ. 2021-11-17T03:46:23.89 0.3 undecidable manual S 192 0.1448 117 0.55 66
IV.MTRZ.HNE. 2021-11-17T03:46:23.29 0.1 undecidable manual P 1 0.2401 107 0.65 83
IV.MPPT.EHE. 2021-11-17T03:46:23.16 0.1 undecidable manual P 244 0.2617 106 0.05 96
IV.BRIS.HHZ. 2021-11-17T03:46:23.85 0.1 undecidable manual P 59 0.2923 104 0.09 95
IV.RUFI.EHZ. 2021-11-17T03:46:22.74 0.1 undecidable manual P 164 0.2437 107 0.02 97
IV.VISG.HHZ. 2021-11-17T03:46:22.01 0.3 undecidable manual S 6 0.1169 123 -0.39 69
IV.FNVD.HHE. 2021-11-17T03:46:22.30 0.1 undecidable manual P 294 0.232 108 -0.17 95
IV.BOSL.HHZ. 2021-11-17T03:46:21.21 0.1 undecidable manual P 192 0.1448 117 0.53 89
IV.MOCL.EHZ. 2021-11-17T03:46:21.65 0.1 undecidable manual P 248 0.1835 112 0.19 95
IV.LMD.HHZ. 2021-11-17T03:46:21.56 0.1 undecidable manual P 89 0.2077 110 -0.4 90
IV.VISG.HHZ. 2021-11-17T03:46:20.13 0.1 undecidable manual P 6 0.1169 123 -0.01 100
IV.SEI.HHZ. 2021-11-17T03:46:19.99 0.3 undecidable manual S 247 0.0468 148 -0.47 69
IV.SEI.HHZ. 2021-11-17T03:46:18.87 0.1 undecidable manual P 247 0.0468 148 -0.14 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:1.4 0.000255 0.58 AML other m 2021-11-17T03:46:22.11
IV.VISG.HHN. ML:1.3 0.0002165 1.5 AML other m 2021-11-17T03:46:23.90
IV.BOSL.HHE. ML:0.8 5.53E-5 0.18 AML other m 2021-11-17T03:46:24.05
IV.BOSL.HHN. ML:0.7 4.4E-5 0.32 AML other m 2021-11-17T03:46:24.23
IV.MOCL.EHN. ML:1.8 0.0004175 0.24 AML other m 2021-11-17T03:46:24.84
IV.MOCL.EHE. ML:1.8 0.0004365 0.22 AML other m 2021-11-17T03:46:24.85
IV.SEI.HHE. ML:0 0.0021540275 0.0992 AML other m 2021-11-17T03:46:20.24
IV.SEI.HHN. ML:0 0.0016075863 0.1184 AML other m 2021-11-17T03:46:20.32
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