Earthquake with magnitude of ML 0.8 on date 03-11-2021 and time 15:55:17 (UTC) in region 6 km SW Firenzuola (FI)

A magnitude ML 0.8 earthquake occured in region: 6 km SW Firenzuola (FI), on

  • 03-11-2021 15:55:17 (UTC)
  • 03-11-2021 16:55:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.077, 11.341 at 9 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
Barberino di Mugello FI 12 10836 15562
Scarperia e San Piero FI 13 12217 27779
Borgo San Lorenzo FI 14 18211 45990
Vernio PO 15 6060 52050
Monghidoro BO 16 3749 55799
Castiglione dei Pepoli BO 17 5648 61447
Palazzuolo sul Senio FI 17 1154 62601
San Benedetto Val di Sambro BO 18 4315 66916
Vicchio FI 19 8044 74960
Cantagallo PO 19 3105 78065
Vaglia FI 19 5073 83138

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km NE of Prato (191150 inhabitants)
35 Km N of Firenze (382808 inhabitants)
37 Km E of Pistoia (90315 inhabitants)
38 Km NE of Scandicci (50609 inhabitants)
43 Km SW of Imola (69797 inhabitants)
47 Km S of Bologna (386663 inhabitants)
49 Km W of Faenza (58541 inhabitants)
58 Km W of Forlì (117913 inhabitants)
71 Km SE of Modena (184973 inhabitants)
72 Km E of Lucca (89046 inhabitants)
72 Km W of Cesena (96758 inhabitants)
78 Km W of Ravenna (159116 inhabitants)
81 Km NW of Arezzo (99543 inhabitants)
84 Km N of Siena (53903 inhabitants)
85 Km E of Pisa (89158 inhabitants)
86 Km SE of Carpi (70699 inhabitants)
87 Km S of Ferrara (133155 inhabitants)
89 Km SE of Reggio nell'Emilia (171345 inhabitants)
90 Km E of Viareggio (62467 inhabitants)
96 Km E of Massa (69479 inhabitants)
98 Km W of Rimini (147750 inhabitants)
99 Km E of Carrara (63133 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 0.8 2021-11-03
15:55:17
44.0773 11.3408 9 2021-11-03
16:24:38
Sala Sismica INGV-Roma 97206321
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-03 15:55:17 ± 0.12
Latitude 44.0773 ± 0.0036
Longitude 11.3408 ± 0.0063
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97206321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 454
Semi-minor axis of confidence ellipse (meter) 301
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 314
Circular confidence region, given by single value of horizontal uncertainty (meter) 450
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 153
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.02608
Epicentral distance of station farthest from the epicenter (degree) 0.21674
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 97206321
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-03 16:24:38
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MPPT.EHE. 2021-11-03T15:55:26.09 0.6 undecidable manual S 236 0.2167 110 -0.18 47
IV.BOSL.HHZ. 2021-11-03T15:55:23.91 0.6 undecidable manual S 171 0.1484 118 0.05 49
IV.VISG.HHZ. 2021-11-03T15:55:23.32 0.6 undecidable manual S 31 0.1304 121 0.07 49
IV.MOCL.EHZ. 2021-11-03T15:55:23.38 0.3 undecidable manual S 238 0.1358 120 -0.06 73
IV.MPPT.EHE. 2021-11-03T15:55:22.85 0.3 undecidable manual P 236 0.2167 110 0.33 68
IV.BOSL.HHZ. 2021-11-03T15:55:21.06 0.1 undecidable manual P 171 0.1484 118 -0.08 97
IV.MOCL.EHZ. 2021-11-03T15:55:20.88 0.1 undecidable manual P 238 0.1358 120 -0.01 98
IV.SEI.HHZ. 2021-11-03T15:55:20.63 0.3 undecidable manual S 151 0.0261 161 0.06 75
IV.VISG.HHZ. 2021-11-03T15:55:20.69 0.1 undecidable manual P 31 0.1304 121 -0.09 97
IV.SEI.HHZ. 2021-11-03T15:55:19.21 0.1 undecidable manual P 151 0.0261 161 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SEI.HHN. ML:0 0.0006895 0.24 AML other m 2021-11-03T15:55:20.85
IV.SEI.HHE. ML:0 0.000203 0.12 AML other m 2021-11-03T15:55:20.89
IV.VISG.HHE. ML:0.5 3.53E-5 0.58 AML other m 2021-11-03T15:55:23.15
IV.MOCL.EHE. ML:1.1 0.0001235 1.06 AML other m 2021-11-03T15:55:23.45
IV.VISG.HHN. ML:0.6 4.29E-5 0.7 AML other m 2021-11-03T15:55:23.83
IV.MOCL.EHN. ML:1 9.305E-5 0.34 AML other m 2021-11-03T15:55:23.45
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