Earthquake with magnitude of ML 1.4 on date 28-05-2021 and time 23:59:56 (Italy) in region 6 km W Greve in Chianti (FI)

A magnitude ML 1.4 earthquake occured in region: 6 km W Greve in Chianti (FI), on

  • 28-05-2021 21:59:56 (UTC)
  • 28-05-2021 23:59:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.565, 11.252 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Greve in Chianti FI 6 13862 13862
Tavarnelle Val di Pesa FI 6 7800 21662
Barberino Val d'Elsa FI 7 4386 26048
Castellina in Chianti SI 11 2859 28907
San Casciano in Val di Pesa FI 12 17062 45969
Radda in Chianti SI 13 1613 47582
Impruneta FI 14 14615 62197
Poggibonsi SI 14 29196 91393
Montespertoli FI 17 13537 104930
Certaldo FI 17 16121 121051
Gaiole in Chianti SI 18 2758 123809
Colle di Val d'Elsa SI 19 21620 145429
Monteriggioni SI 19 9810 155239
Figline e Incisa Valdarno FI 20 23505 178744
Cavriglia AR 20 9614 188358
San Gimignano SI 20 7820 196178

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km S of Scandicci (50609 inhabitants)
23 Km S of Firenze (382808 inhabitants)
28 Km N of Siena (53903 inhabitants)
37 Km SE of Prato (191150 inhabitants)
49 Km SE of Pistoia (90315 inhabitants)
52 Km W of Arezzo (99543 inhabitants)
68 Km E of Lucca (89046 inhabitants)
71 Km E of Pisa (89158 inhabitants)
76 Km E of Livorno (159219 inhabitants)
87 Km E of Viareggio (62467 inhabitants)
90 Km N of Grosseto (82087 inhabitants)
95 Km SW of Faenza (58541 inhabitants)
95 Km SW of Imola (69797 inhabitants)
97 Km SW of Forlì (117913 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 1.4 2021-05-28
21:59:56
43.5647 11.2523 10 2021-12-29
11:12:03
Bollettino Sismico Italiano INGV 90892991
Reviewed
Rev100
ML 1.5 2021-05-28
21:59:56
43.5442 11.2568 12 2021-05-28
22:09:09
Sala Sismica INGV-Roma 90581921
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-28 21:59:56 ± 0.09
Latitude 43.5647 ± 0.0045
Longitude 11.2523 ± 0.0062
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90892991

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 464
Semi-minor axis of confidence ellipse (meter) 430
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 269
Circular confidence region, given by single value of horizontal uncertainty (meter) 460
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 96
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.09533
Epicentral distance of station farthest from the epicenter (degree) 0.60884
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 90892991
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-07 13:02:31

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 19
Type of magnitude ML
Reference to an origin 90581921
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-28 22:09:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.LMD.HHZ. 2021-05-28T22:00:17.99 0.6 undecidable manual S 32 0.6088 50 0.31 42
IV.PII.HHZ. 2021-05-28T22:00:15.31 0.3 undecidable manual S 287 0.5486 50 -0.61 59
IV.SFI.HNN. 2021-05-28T22:00:15.92 0.3 undecidable manual S 51 0.5477 50 0.05 68
IV.SEI.HHZ. 2021-05-28T22:00:14.57 0.3 undecidable manual S 9 0.4955 50 0.24 66
IV.CRE.HHE. 2021-05-28T22:00:14.88 0.6 undecidable manual S 84 0.509 50 0.15 45
IV.ASQU.HHZ. 2021-05-28T22:00:12.90 0.3 undecidable manual S 59 0.4524 50 -0.15 68
IV.MOCL.EHZ. 2021-05-28T22:00:12.49 0.6 undecidable manual S 353 0.4434 50 -0.28 44
IV.MPPT.EHN. 2021-05-28T22:00:11.78 0.6 undecidable manual S 343 0.4101 50 -0.01 47
IV.FROS.CHE. 2021-05-28T22:00:10.40 0.3 undecidable manual S 191 0.3615 50 0.04 71
IV.LMD.HHZ. 2021-05-28T22:00:09.15 0.1 undecidable manual P 32 0.6088 50 0.27 86
IV.RUFI.EHZ. 2021-05-28T22:00:08.76 0.3 undecidable manual S 34 0.3301 50 -0.68 60
IV.CRMI.HHZ. 2021-05-28T22:00:08.54 0.6 undecidable manual S 320 0.304 50 -0.11 47
IV.SFI.HNN. 2021-05-28T22:00:08.08 0.1 undecidable manual P 51 0.5477 50 0.24 87
IV.SEI.HHZ. 2021-05-28T22:00:07.00 0.1 undecidable manual P 9 0.4955 50 0.05 92
IV.PII.HHZ. 2021-05-28T22:00:07.98 0.1 undecidable manual P 287 0.5486 50 0.11 90
IV.CRE.HHE. 2021-05-28T22:00:07.08 0.3 undecidable manual P 84 0.509 50 -0.1 68
IV.ASQU.HHZ. 2021-05-28T22:00:06.11 0.1 undecidable manual P 59 0.4524 50 -0.1 92
IV.MOCL.EHZ. 2021-05-28T22:00:06.27 0.6 undecidable manual P 353 0.4434 50 0.22 45
IV.MPPT.EHN. 2021-05-28T22:00:05.84 0.3 undecidable manual P 343 0.4101 50 0.36 66
IV.FROS.CHE. 2021-05-28T22:00:04.83 0.1 positive manual P 191 0.3615 50 0.17 92
IV.RUFI.EHZ. 2021-05-28T22:00:03.81 0.1 positive manual P 34 0.3301 50 -0.31 90
IV.CRMI.HHZ. 2021-05-28T22:00:03.97 0.3 undecidable manual P 320 0.304 50 0.3 68
IV.CSNT.HHZ. 2021-05-28T22:00:01.60 0.3 undecidable manual S 163 0.0953 132 -0.21 72
IV.CSNT.HHZ. 2021-05-28T21:59:59.70 0.1 positive manual P 163 0.0953 132 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSNT.HHE. ML:1.6 0.000554 0.2 AML other m 2021-05-28T22:00:02.02
IV.CSNT.HHN. ML:1.7 0.0006624631 0.2176 AML other m 2021-05-28T22:00:02.14
IV.FIR.HHN. ML:0 0.0002686695 0.928 AML other m 2021-05-28T22:00:05.19
IV.FIR.HHE. ML:0 0.000352 0.08 AML other m 2021-05-28T22:00:07.28
IV.RUFI.EHE. ML:0 0.00010605555 0.1792 AML other m 2021-05-28T22:00:09.27
IV.RUFI.EHN. ML:0 7.108718E-5 0.1408 AML other m 2021-05-28T22:00:09.79
IV.CRMI.HHE. ML:0.7 1.855E-5 0.92 AML other m 2021-05-28T22:00:09.87
IV.CRMI.HHN. ML:0.8 3.07E-5 0.58 AML other m 2021-05-28T22:00:10.93
IV.ASQU.HHN. ML:1.2 4.595E-5 0.48 AML other m 2021-05-28T22:00:13.11
IV.ASQU.HHE. ML:1.4 6.095E-5 0.48 AML other m 2021-05-28T22:00:13.35
IV.MOCL.EHE. ML:1.9 0.0002055 0.16 AML other m 2021-05-28T22:00:13.43
IV.MOCL.EHN. ML:1.7 0.0001295 0.26 AML other m 2021-05-28T22:00:13.97
IV.SEI.HHE. ML:1.7 0.000106 0.66 AML other m 2021-05-28T22:00:15.38
IV.SEI.HHN. ML:1.8 0.0001645 0.14 AML other m 2021-05-28T22:00:15.82
IV.PII.HHN. ML:0 3.16E-5 0.48 AML other m 2021-05-28T22:00:17.30
IV.LMD.HHN. ML:1.4 3.96E-5 0.12 AML other m 2021-05-28T22:00:18.65
IV.LMD.HHE. ML:1.4 4.685E-5 1.06 AML other m 2021-05-28T22:00:18.17
IV.PII.HHE. ML:0 3.07E-5 0.42 AML other m 2021-05-28T22:00:19.34
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