Earthquake with magnitude of ML 1.1 on date 11-12-2019 and time 22:26:03 (UTC) in region 3 km E Sesto Fiorentino (FI)

A magnitude ML 1.1 earthquake occured in region: 3 km E Sesto Fiorentino (FI), on

  • 11-12-2019 22:26:03 (UTC)
  • 11-12-2019 23:26:03 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.83, 11.24 at 1 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
Sesto Fiorentino FI 3 48958 48958
Fiesole FI 5 13969 62927
Calenzano FI 7 17489 80416
Firenze FI 7 382808 463224
Campi Bisenzio FI 8 46166 509390
Vaglia FI 9 5073 514463
Scandicci FI 9 50609 565072
Bagno a Ripoli FI 11 25611 590683
Signa FI 13 19179 609862
Lastra a Signa FI 13 20156 630018
Prato PO 13 191150 821168
Poggio a Caiano PO 15 10007 831175
Scarperia e San Piero FI 16 12217 843392
Impruneta FI 16 14615 858007
Pontassieve FI 17 20603 878610
Vaiano PO 18 9895 888505
Carmignano PO 18 14450 902955
Borgo San Lorenzo FI 18 18211 921166
Barberino di Mugello FI 19 10836 932002
Montemurlo PO 19 18456 950458
San Casciano in Val di Pesa FI 20 17062 967520

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km N of Firenze (382808 inhabitants)
9 Km NE of Scandicci (50609 inhabitants)
13 Km E of Prato (191150 inhabitants)
28 Km E of Pistoia (90315 inhabitants)
58 Km N of Siena (53903 inhabitants)
59 Km E of Lucca (89046 inhabitants)
66 Km NW of Arezzo (99543 inhabitants)
68 Km E of Pisa (89158 inhabitants)
69 Km SW of Imola (69797 inhabitants)
72 Km SW of Faenza (58541 inhabitants)
74 Km S of Bologna (386663 inhabitants)
78 Km SW of Forlì (117913 inhabitants)
79 Km E of Viareggio (62467 inhabitants)
81 Km E of Livorno (159219 inhabitants)
87 Km W of Cesena (96758 inhabitants)
91 Km E of Massa (69479 inhabitants)
94 Km S of Modena (184973 inhabitants)
95 Km E of Carrara (63133 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
Rev 100 ML 1.1 2019-12-11
22:26:03
43.83 11.24 1 2019-12-11
23:01:46
Sala Sismica INGV-Roma 74563171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-11 22:26:03 ± 0.42
Latitude 43.83 ± 0.00
Longitude 11.24 ± 0.00
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 74563171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 699
Semi-minor axis of confidence ellipse (meter) 0
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 177
Circular confidence region, given by single value of horizontal uncertainty (meter) 700
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 218
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.17807
Epicentral distance of station farthest from the epicenter (degree) 0.23832
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 74563171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-11 23:01:46
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RONT.HHZ. 2019-12-11T22:26:12.08 0.6 undecidable manual S 41 0.2131 92 -0.09 50
IV.MOCL.EHZ. 2019-12-11T22:26:10.56 0.6 undecidable manual S 346 0.1781 93 -0.24 49
IV.RONT.HHZ. 2019-12-11T22:26:09.60 0.6 undecidable manual P 41 0.2131 92 0.9 39
IV.MOCL.EHZ. 2019-12-11T22:26:08.89 0.3 undecidable manual P 346 0.1781 93 0.98 57
IV.SEI.HHZ. 2019-12-11T22:26:08.51 0.1 undecidable manual P 21 0.2383 92 -0.74 83
IV.CRMI.HHZ. 2019-12-11T22:26:08.07 0.1 positive manual P 259 0.1907 92 -0.13 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRMI.HHN. ML:1.1 0.00010275 0.1 AML other m 2019-12-11T22:26:08.26
IV.CRMI.HHE. ML:1.3 0.000156 0.08 AML other m 2019-12-11T22:26:08.26
IV.SEI.HHE. ML:1.1 7.445E-5 0.32 AML other m 2019-12-11T22:26:10.20
IV.MOCL.EHE. ML:0.9 7.685E-5 0.92 AML other m 2019-12-11T22:26:10.66
IV.MOCL.EHN. ML:0.9 6.955E-5 0.12 AML other m 2019-12-11T22:26:10.68
IV.SEI.HHN. ML:1.4 0.000148 1.48 AML other m 2019-12-11T22:26:10.21
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