Earthquake with magnitude of ML 1.4 on date 29-10-2020 and time 04:16:45 (UTC) in region 4 km SE Castelfiorentino (FI)

A magnitude ML 1.4 earthquake occured in region: 4 km SE Castelfiorentino (FI), on

  • 29-10-2020 04:16:45 (UTC)
  • 29-10-2020 05:16:45 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.57, 10.99 at 6 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
Castelfiorentino FI 4 17504 17504
Gambassi Terme FI 5 4870 22374
Certaldo FI 5 16121 38495
Montaione FI 6 3700 42195
Montespertoli FI 11 13537 55732
San Gimignano SI 13 7820 63552
Tavarnelle Val di Pesa FI 15 7800 71352
Barberino Val d'Elsa FI 15 4386 75738
San Miniato PI 16 27934 103672
Empoli FI 17 48109 151781
Palaia PI 17 4612 156393
Poggibonsi SI 18 29196 185589
Montelupo Fiorentino FI 18 14098 199687
San Casciano in Val di Pesa FI 19 17062 216749
Capraia e Limite FI 19 7670 224419
Colle di Val d'Elsa SI 20 21620 246039

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km SW of Scandicci (50609 inhabitants)
31 Km SW of Firenze (382808 inhabitants)
35 Km S of Prato (191150 inhabitants)
40 Km NW of Siena (53903 inhabitants)
40 Km S of Pistoia (90315 inhabitants)
49 Km SE of Lucca (89046 inhabitants)
50 Km E of Pisa (89158 inhabitants)
55 Km E of Livorno (159219 inhabitants)
68 Km E of Viareggio (62467 inhabitants)
73 Km W of Arezzo (99543 inhabitants)
85 Km SE of Massa (69479 inhabitants)
91 Km SE of Carrara (63133 inhabitants)
91 Km N of Grosseto (82087 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
Reviewed
Rev100
ML 1.4 2020-10-29
04:16:45
43.57 10.99 6 2020-10-29
04:23:09
Sala Sismica INGV-Roma 84227881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-29 04:16:45 ± 0.22
Latitude 43.57 ± 0.01
Longitude 10.99 ± 0.01
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 84227881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1108
Semi-minor axis of confidence ellipse (meter) 654
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 207
Circular confidence region, given by single value of horizontal uncertainty (meter) 1110
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 179
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.22123
Epicentral distance of station farthest from the epicenter (degree) 0.56387
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 84227881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-29 04:23:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.BDI.HHZ. 2020-10-29T04:17:05.73 0.6 undecidable manual S 330 0.5639 50 -0.12 48
IV.RONT.HHZ. 2020-10-29T04:17:05.37 0.6 undecidable manual S 37 0.5288 50 0.56 44
IV.RINC.HHZ. 2020-10-29T04:17:04.96 0.6 undecidable manual S 55 0.5459 50 -0.37 46
GU.POPM.HHZ. 2020-10-29T04:17:03.59 0.6 undecidable manual S 341 0.4982 50 -0.34 47
IV.RUFI.EHZ. 2020-10-29T04:17:01.83 0.3 undecidable manual S 55 0.4605 50 -0.98 56
IV.MPPT.EHZ. 2020-10-29T04:17:00.00 0.3 undecidable manual S 11 0.3903 98 -0.69 64
IV.PII.HHZ. 2020-10-29T04:16:59.25 0.3 undecidable manual S 294 0.3651 98 -0.46 70
IV.RINC.HHZ. 2020-10-29T04:16:57.49 0.6 negative manual P 55 0.5459 50 0.53 44
IV.BDI.HHZ. 2020-10-29T04:16:57.49 0.3 negative manual P 330 0.5639 50 0.23 70
IV.RONT.HHZ. 2020-10-29T04:16:57.41 0.1 undecidable manual P 37 0.5288 50 0.75 81
GU.POPM.HHZ. 2020-10-29T04:16:56.41 0.6 undecidable manual P 341 0.4982 50 0.26 47
IV.RUFI.EHZ. 2020-10-29T04:16:55.38 0.6 negative manual P 55 0.4605 50 -0.12 49
IV.CSNT.HHZ. 2020-10-29T04:16:54.69 0.6 undecidable manual S 115 0.2419 102 -0.38 49
IV.MPPT.EHZ. 2020-10-29T04:16:54.29 0.6 undecidable manual P 11 0.3903 98 0.01 51
IV.CRMI.HHZ. 2020-10-29T04:16:54.67 0.6 undecidable manual S 359 0.2212 103 0.4 49
IV.PII.HHZ. 2020-10-29T04:16:53.59 0.1 negative manual P 294 0.3651 98 -0.12 100
IV.CRMI.HHZ. 2020-10-29T04:16:51.08 0.1 positive manual P 359 0.2212 103 0.51 95
IV.CSNT.HHZ. 2020-10-29T04:16:51.04 0.6 negative manual P 115 0.2419 102 0.01 52
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHE. ML:1 5.845E-5 1.12 AML other m 2020-10-29T04:16:55.27
IV.CRMI.HHE. ML:1 6.29E-5 0.42 AML other m 2020-10-29T04:16:55.64
IV.CSNT.HHN. ML:1.1 7.065E-5 1.3 AML other m 2020-10-29T04:16:55.87
IV.CRMI.HHN. ML:0.7 3.425E-5 1.16 AML other m 2020-10-29T04:16:55.98
IV.PII.HHN. ML:1.5 0.0001168 1.62 AML other m 2020-10-29T04:16:59.13
IV.PII.HHE. ML:1.5 0.0001205 0.72 AML other m 2020-10-29T04:17:00.14
GU.POPM.HHN. ML:1.5 7.91E-5 0.3 AML other m 2020-10-29T04:17:04.28
GU.POPM.HHE. ML:1.4 6.645E-5 0.52 AML other m 2020-10-29T04:17:04.27
IV.BDI.HHN. ML:1.3 3.9275E-5 0.46 AML other m 2020-10-29T04:17:06.90
IV.RONT.HHE. ML:2 0.0002105 0.32 AML other m 2020-10-29T04:17:08.64
IV.RONT.HHN. ML:1.7 0.000116 1.64 AML other m 2020-10-29T04:17:09.04
IV.BDI.HHE. ML:1.5 6.365E-5 0.54 AML other m 2020-10-29T04:17:09.41
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