Earthquake with magnitude of ML 0.5 on date 22-10-2021 and time 02:34:19 (UTC) in region 3 km NW Tavarnelle Val di Pesa (FI)

A magnitude ML 0.5 earthquake occured in region: 3 km NW Tavarnelle Val di Pesa (FI), on

  • 22-10-2021 02:34:19 (UTC)
  • 22-10-2021 04:34:19 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.583, 11.146 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
Tavarnelle Val di Pesa FI 3 7800 7800
Barberino Val d'Elsa FI 5 4386 12186
Montespertoli FI 9 13537 25723
San Casciano in Val di Pesa FI 9 17062 42785
Certaldo FI 9 16121 58906
Poggibonsi SI 13 29196 88102
Greve in Chianti FI 14 13862 101964
Castelfiorentino FI 14 17504 119468
Impruneta FI 15 14615 134083
San Gimignano SI 15 7820 141903
Gambassi Terme FI 16 4870 146773
Castellina in Chianti SI 17 2859 149632
Colle di Val d'Elsa SI 18 21620 171252
Montaione FI 19 3700 174952
Montelupo Fiorentino FI 19 14098 189050
Scandicci FI 20 50609 239659

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km S of Scandicci (50609 inhabitants)
23 Km SW of Firenze (382808 inhabitants)
33 Km NW of Siena (53903 inhabitants)
33 Km S of Prato (191150 inhabitants)
43 Km SE of Pistoia (90315 inhabitants)
59 Km E of Lucca (89046 inhabitants)
61 Km W of Arezzo (99543 inhabitants)
62 Km E of Pisa (89158 inhabitants)
67 Km E of Livorno (159219 inhabitants)
79 Km E of Viareggio (62467 inhabitants)
91 Km N of Grosseto (82087 inhabitants)
95 Km SE of Massa (69479 inhabitants)
97 Km SW of Imola (69797 inhabitants)
98 Km SW of Faenza (58541 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 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
Reviewed
Rev100
ML 0.5 2021-10-22
02:34:19
43.5833 11.1457 8 2021-10-22
02:43:22
Sala Sismica INGV-Roma 96863511
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-22 02:34:19 ± 0.1
Latitude 43.5833 ± 0.0072
Longitude 11.1457 ± 0.0099
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 96863511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 751
Semi-minor axis of confidence ellipse (meter) 672
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 202
Circular confidence region, given by single value of horizontal uncertainty (meter) 750
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 86
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.51171
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.5

Field Value
Value 0.5
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 96863511
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-22 02:43:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PII.HHZ. 2021-10-22T02:34:36.08 0.1 undecidable manual S 287 0.4694 50 -0.61 82
IV.RUFI.EHZ. 2021-10-22T02:34:33.36 0.3 undecidable manual S 46 0.366 50 -0.25 69
IV.MPPT.EHZ. 2021-10-22T02:34:33.83 0.1 undecidable manual S 354 0.3759 50 -0.09 95
IV.POPM.HHZ. 2021-10-22T02:34:32.78 3.0 undecidable manual P 0
IV.TRIF.CHE. 2021-10-22T02:34:30.26 0.3 undecidable manual P 201 0.5009 50 0.22 68
IV.ASQU.HHE. 2021-10-22T02:34:30.48 0.3 undecidable manual P 65 0.5117 50 0.25 67
IV.PII.HHZ. 2021-10-22T02:34:29.89 0.1 undecidable manual P 287 0.4694 50 0.37 88
IV.CRMI.HHZ. 2021-10-22T02:34:29.49 0.3 undecidable manual S 331 0.2437 107 -0.06 74
IV.MPPT.EHZ. 2021-10-22T02:34:28.13 0.1 undecidable manual P 354 0.3759 50 0.21 93
IV.RUFI.EHZ. 2021-10-22T02:34:27.76 0.1 undecidable manual P 46 0.366 50 0.02 97
IV.CSNT.HHZ. 2021-10-22T02:34:26.03 0.3 undecidable manual S 136 0.152 116 -0.23 72
IV.CRMI.HHZ. 2021-10-22T02:34:25.48 0.3 undecidable manual P 331 0.2437 107 0.09 73
IV.OSSC.HHZ. 2021-10-22T02:34:23.81 0.3 undecidable manual S 129 0.0935 129 -0.56 68
IV.CSNT.HHZ. 2021-10-22T02:34:23.55 0.1 undecidable manual P 136 0.152 116 0.05 100
IV.OSSC.HHZ. 2021-10-22T02:34:22.79 0.1 undecidable manual P 129 0.0935 129 0.39 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:0.7 7.195E-5 0.58 AML other m 2021-10-22T02:34:22.57
IV.OSSC.HHN. ML:0.5 4.067126E-5 1.4192 AML other m 2021-10-22T02:34:24.58
IV.CSNT.HHE. ML:0.6 3.2543915E-5 0.36 AML other m 2021-10-22T02:34:26.47
IV.CSNT.HHN. ML:0.5 2.941821E-5 1.2608 AML other m 2021-10-22T02:34:26.54
IV.CRMI.HHE. ML:0.3 8.4267465E-6 0.8 AML other m 2021-10-22T02:34:29.92
IV.CRMI.HHN. ML:0.4 1.5658938E-5 0.5616 AML other m 2021-10-22T02:34:30.13
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