Earthquake with magnitude of ML 1.4 on date 12-11-2021 and time 11:06:43 (UTC) in region 5 km E Firenzuola (FI)

A magnitude ML 1.4 earthquake occured in region: 5 km E Firenzuola (FI), on

  • 12-11-2021 11:06:43 (UTC)
  • 12-11-2021 12:06:43 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.139, 11.442 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
Palazzuolo sul Senio FI 9 1154 5880
Castel del Rio BO 10 1246 7126
Monghidoro BO 14 3749 10875
Marradi FI 15 3139 14014
Fontanelice BO 16 1943 15957
Casola Valsenio RA 17 2617 18574
Loiano BO 18 4294 22868
San Benedetto Val di Sambro BO 19 4315 27183
Borgo Tossignano BO 20 3288 30471

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km SW of Imola (69797 inhabitants)
39 Km W of Faenza (58541 inhabitants)
40 Km NE of Prato (191150 inhabitants)
40 Km S of Bologna (386663 inhabitants)
44 Km NE of Firenze (382808 inhabitants)
47 Km NE of Scandicci (50609 inhabitants)
48 Km E of Pistoia (90315 inhabitants)
49 Km W of Forlì (117913 inhabitants)
64 Km W of Cesena (96758 inhabitants)
68 Km W of Ravenna (159116 inhabitants)
70 Km SE of Modena (184973 inhabitants)
79 Km S of Ferrara (133155 inhabitants)
82 Km E of Lucca (89046 inhabitants)
83 Km NW of Arezzo (99543 inhabitants)
84 Km SE of Carpi (70699 inhabitants)
90 Km SE of Reggio nell'Emilia (171345 inhabitants)
90 Km W of Rimini (147750 inhabitants)
92 Km N of Siena (53903 inhabitants)
96 Km E of Pisa (89158 inhabitants)
100 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 1.4 2021-11-12
11:06:43
44.1387 11.4423 9 2021-11-12
11:15:06
Sala Sismica INGV-Roma 97414481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-12 11:06:43 ± 0.08
Latitude 44.1387 ± 0.0027
Longitude 11.4423 ± 0.0063
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97414481

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 478
Semi-minor axis of confidence ellipse (meter) 234
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 112
Circular confidence region, given by single value of horizontal uncertainty (meter) 480
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 221
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.09
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.31117
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 97414481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-12 11:15:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.APEC.HHZ. 2021-11-12T11:07:13.18 3.0 undecidable manual S -0.03 0
IV.TRIF.CHZ. 2021-11-12T11:07:02.15 3.0 negative manual P -0.18 0
IV.MPPT.EHZ. 2021-11-12T11:06:55.21 0.6 undecidable manual S 235 0.3112 50 -0.08 47
IV.MTRZ.HHZ. 2021-11-12T11:06:54.18 3.0 undecidable manual S 0
IV.FNVD.HHZ. 2021-11-12T11:06:52.60 0.6 undecidable manual S 277 0.2311 109 0.13 48
IV.MOCL.EHZ. 2021-11-12T11:06:52.32 0.3 undecidable manual S 235 0.2302 109 -0.14 71
IV.MPPT.EHZ. 2021-11-12T11:06:50.14 0.1 undecidable manual P 235 0.3112 50 0.01 96
IV.SFI.EHZ. 2021-11-12T11:06:50.55 3.0 positive manual P 0.44 0
IV.MTRZ.HHZ. 2021-11-12T11:06:49.08 3.0 undecidable manual P 0
IV.MOCL.EHZ. 2021-11-12T11:06:48.61 0.1 undecidable manual P 235 0.2302 109 0.12 96
IV.SEI.HHZ. 2021-11-12T11:06:48.12 0.3 undecidable manual S 215 0.1034 127 0.04 75
IV.FNVD.HHZ. 2021-11-12T11:06:48.44 0.3 undecidable manual P 277 0.2311 109 -0.06 73
IV.VISG.HHZ. 2021-11-12T11:06:46.58 0.3 undecidable manual S 354 0.0504 147 -0.09 75
IV.VISG.HHZ. 2021-11-12T11:06:45.23 0.6 positive manual P 354 0.0504 147 0.08 50
IV.SEI.HHZ. 2021-11-12T11:06:45.95 0.1 positive manual P 215 0.1034 127 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VISG.HHE. ML:1.4 0.0004525 1.2 AML other m 2021-11-12T11:06:47.12
IV.VISG.HHN. ML:1.6 0.0007035 0.26 AML other m 2021-11-12T11:06:47.63
IV.SEI.HHE. ML:1.8 0.00078424125 0.32 AML other m 2021-11-12T11:06:50.52
IV.SEI.HHN. ML:1.8 0.0007548293 0.3392 AML other m 2021-11-12T11:06:50.30
IV.MOCL.EHE. ML:1.2 8.5504315E-5 1.5616 AML other m 2021-11-12T11:06:52.66
IV.MOCL.EHN. ML:1.2 8.68E-5 1.3 AML other m 2021-11-12T11:06:54.99
IV.MPPT.EHN. ML:0.9 3.09941295E-5 0.32 AML other m 2021-11-12T11:06:58.56
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