Earthquake with magnitude of ML 1.1 on date 19-02-2021 and time 21:46:59 (Italy) in region 5 km W Figline e Incisa Valdarno (FI)

A magnitude ML 1.1 earthquake occured in region: 5 km W Figline e Incisa Valdarno (FI), on

  • 19-02-2021 20:46:59 (UTC)
  • 19-02-2021 21:46:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.67, 11.39 at 11 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
Figline e Incisa Valdarno FI 5 23505 23505
Rignano sull'Arno FI 7 8651 32156
Bagno a Ripoli FI 10 25611 57767
Impruneta FI 11 14615 72382
Reggello FI 12 16290 88672
Greve in Chianti FI 12 13862 102534
Pontassieve FI 12 20603 123137
Pelago FI 14 7660 130797
Castelfranco Piandiscò AR 14 9632 140429
Firenze FI 15 382808 523237
San Giovanni Valdarno AR 16 17018 540255
Fiesole FI 17 13969 554224
San Casciano in Val di Pesa FI 17 17062 571286
Cavriglia AR 18 9614 580900
Rufina FI 19 7346 588246
Scandicci FI 19 50609 638855
Montemignaio AR 20 566 639421

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 Km SE of Firenze (382808 inhabitants)
19 Km E of Scandicci (50609 inhabitants)
33 Km SE of Prato (191150 inhabitants)
40 Km N of Siena (53903 inhabitants)
46 Km NW of Arezzo (99543 inhabitants)
48 Km SE of Pistoia (90315 inhabitants)
74 Km E of Lucca (89046 inhabitants)
79 Km SW of Faenza (58541 inhabitants)
80 Km E of Pisa (89158 inhabitants)
80 Km SW of Imola (69797 inhabitants)
80 Km SW of Forlì (117913 inhabitants)
85 Km SW of Cesena (96758 inhabitants)
88 Km E of Livorno (159219 inhabitants)
91 Km S of Bologna (386663 inhabitants)
94 Km E of Viareggio (62467 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 1.1 2021-02-19
20:46:59
43.67 11.39 11 2021-02-19
20:52:51
Sala Sismica INGV-Roma 87306261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-19 20:46:59 ± 0.19
Latitude 43.67 ± 0.01
Longitude 11.39 ± 0.02
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 87306261

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1884
Semi-minor axis of confidence ellipse (meter) 689
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 313
Circular confidence region, given by single value of horizontal uncertainty (meter) 1880
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
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) 0.36
Epicentral distance of station closest to the epicenter (degree) 0.14119
Epicentral distance of station farthest from the epicenter (degree) 0.31117
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:1.1

Field Value
Value 1.1
Uncertainty 0.4
Num. used stations 4
Type of magnitude ML
Reference to an origin 87306261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-19 20:52:51
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RINC.HHZ. 2021-02-19T20:47:10.11 0.1 undecidable manual S 36 0.2626 50 0.3 93
IV.ASQU.HHZ. 2021-02-19T20:47:10.41 0.3 undecidable manual S 67 0.3112 50 -0.85 58
IV.CSNT.HHZ. 2021-02-19T20:47:08.58 0.1 undecidable manual S 200 0.2149 50 0.18 97
IV.RUFI.EHZ. 2021-02-19T20:47:07.76 0.1 undecidable manual S 27 0.1835 117 0.32 94
IV.ASQU.HHZ. 2021-02-19T20:47:06.07 0.1 undecidable manual P 67 0.3112 50 -0.21 94
IV.FIR.HHZ. 2021-02-19T20:47:05.68 0.1 undecidable manual S 315 0.1412 124 -0.34 95
IV.RINC.HHZ. 2021-02-19T20:47:05.65 0.1 undecidable manual P 36 0.2626 50 0.21 95
IV.RUFI.EHZ. 2021-02-19T20:47:04.10 0.3 undecidable manual P 27 0.1835 117 0.03 75
IV.CSNT.HHZ. 2021-02-19T20:47:04.63 0.1 positive manual P 200 0.2149 50 0.01 100
IV.FIR.HHZ. 2021-02-19T20:47:03.35 0.6 undecidable manual P 315 0.1412 124 0.1 50
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FIR.HHN. ML:1.4 0.0002525 0.06 AML other m 2021-02-19T20:47:04.76
IV.FIR.HHE. ML:1.5 0.000284 0.06 AML other m 2021-02-19T20:47:05.15
IV.ASQU.HHE. ML:0.8 2.47E-5 0.6 AML other m 2021-02-19T20:47:13.20
IV.ASQU.HHN. ML:0.7 1.835E-5 1.48 AML other m 2021-02-19T20:47:16.80
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