Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 27-06-2021 and time 10:31:20 (Italy) in region 3 km N Scandicci (FI)

A magnitude ML 0.6 earthquake occured in region: 3 km N Scandicci (FI), on

  • 27-06-2021 08:31:20 (UTC)
  • 27-06-2021 10:31:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.7880, 11.1830 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Scandicci FI 3 50609 50609
Sesto Fiorentino FI 5 48958 99567
Campi Bisenzio FI 5 46166 145733
Firenze FI 6 382808 528541
Lastra a Signa FI 6 20156 548697
Signa FI 7 19179 567876
Calenzano FI 9 17489 585365
Fiesole FI 9 13969 599334
Poggio a Caiano PO 11 10007 609341
Bagno a Ripoli FI 12 25611 634952
Prato PO 13 191150 826102
Impruneta FI 13 14615 840717
Carmignano PO 14 14450 855167
Montelupo Fiorentino FI 14 14098 869265
San Casciano in Val di Pesa FI 15 17062 886327
Vaglia FI 16 5073 891400
Capraia e Limite FI 17 7670 899070
Quarrata PT 18 26190 925260
Montespertoli FI 18 13537 938797
Agliana PT 19 17525 956322
Montemurlo PO 19 18456 974778

Municipalities with at least 50000 inhabitants

An earthquake occurred to
3 Km N of Scandicci (50609 inhabitants)
6 Km W of Firenze (382808 inhabitants)
13 Km SE of Prato (191150 inhabitants)
27 Km SE of Pistoia (90315 inhabitants)
54 Km N of Siena (53903 inhabitants)
55 Km E of Lucca (89046 inhabitants)
63 Km E of Pisa (89158 inhabitants)
67 Km NW of Arezzo (99543 inhabitants)
75 Km E of Livorno (159219 inhabitants)
75 Km E of Viareggio (62467 inhabitants)
76 Km SW of Imola (69797 inhabitants)
79 Km SW of Faenza (58541 inhabitants)
80 Km S of Bologna (386663 inhabitants)
84 Km SW of Forlì (117913 inhabitants)
88 Km E of Massa (69479 inhabitants)
93 Km E of Carrara (63133 inhabitants)
93 Km W of Cesena (96758 inhabitants)
98 Km S of Modena (184973 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 0.6 2021-06-27
08:31:20		 43.7878 11.183 11 2021-12-29
11:12:35		 Bollettino Sismico Italiano INGV 96325581
Reviewed
Rev100 		ML 0.6 2021-06-27
08:31:20		 43.7852 11.1992 6 2021-06-27
08:39:00		 Sala Sismica INGV-Roma 91955561
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-27 08:31:20 ± 0.08
Latitude 43.7878 ± 0.0045
Longitude 11.1830 ± 0.0062
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 96325581

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 524
Semi-minor axis of confidence ellipse (meter) 473
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 212
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 34
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.49283
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 96325581
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-10-07 17:01:14

ML:0.6

Field Value
Value 0.6
Uncertainty 0.3
Num. used stations 7
Type of magnitude ML
Reference to an origin 91955561
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-06-27 08:39:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RESU.HHZ. 2021-06-27T08:33:01.64 3.0 negative manual Pg 19.15 0
IV.TST02.HHZ. 2021-06-27T08:32:32.75 3.0 undecidable manual Sn 0.01 0
IV.ZONE.HHZ. 2021-06-27T08:32:15.06 3.0 undecidable manual Sn -0.05 0
CH.FUSIO.HHZ. 2021-06-27T08:32:05.56 3.0 positive manual Pn 4.75 0
IV.EUCT.HNZ. 2021-06-27T08:32:05.91 3.0 undecidable manual Sn -3.97 0
MN.BNI.HHZ. 2021-06-27T08:32:04.27 3.0 undecidable manual Pn 2.81 0
IV.ARRO.EHZ. 2021-06-27T08:31:58.88 3.0 undecidable manual Sn -2.01 0
IV.TERO.HHZ. 2021-06-27T08:31:57.61 3.0 undecidable manual Pg 11.63 0
IV.MTRA.EHZ. 2021-06-27T08:31:54.05 3.0 undecidable manual Pg 10.67 0
IV.MMO1.EHZ. 2021-06-27T08:31:53.09 3.0 undecidable manual Pg 11.05 0
IV.LPEL.HHZ. 2021-06-27T08:31:53.64 3.0 positive manual Pn -1.15 0
IV.MBAL.EHZ. 2021-06-27T08:31:52.42 3.0 undecidable manual Pg 7.03 0
IV.SFI.HNN. 2021-06-27T08:31:37.74 0.6 undecidable manual S 76 54.7008 50 0.28 45
IV.LMD.HHE. 2021-06-27T08:31:37.28 0.6 undecidable manual S 52 52.8027 50 0.32 45
IV.ASQU.HHE. 2021-06-27T08:31:36.02 0.6 undecidable manual S 89 48.5181 50 0.19 46
IV.CSNT.HHZ. 2021-06-27T08:31:31.89 0.3 undecidable manual S 166 35.9418 50 -0.58 64
IV.ATMI.HHZ. 2021-06-27T08:31:30.61 3.0 positive manual P -0.27 0
IV.LMD.HHE. 2021-06-27T08:31:30.10 0.3 undecidable manual P 52 52.8027 50 0.19 69
IV.SFI.HNN. 2021-06-27T08:31:30.61 0.1 undecidable manual P 76 54.7008 50 0.41 87
IV.RUFI.EHZ. 2021-06-27T08:31:29.54 0.1 undecidable manual S 78 26.751 50 -0.46 91
IV.ASQU.HHE. 2021-06-27T08:31:29.58 0.3 undecidable manual P 89 48.5181 50 0.32 67
IV.MOCL.EHZ. 2021-06-27T08:31:28.95 0.3 undecidable manual S 360 24.0537 50 -0.35 70
IV.BOSL.HHN. 2021-06-27T08:31:28.51 0.1 undecidable manual S 44 22.0668 115 -0.24 96
IV.CSNT.HHZ. 2021-06-27T08:31:27.19 0.6 undecidable manual P 166 35.9418 50 -0.13 48
IV.CRMI.HHZ. 2021-06-27T08:31:27.12 0.3 undecidable manual S 273 16.2726 123 0.11 74
IV.MPPT.EHZ. 2021-06-27T08:31:27.84 0.3 undecidable manual S 339 20.2686 117 -0.34 70
IV.BOSL.HHN. 2021-06-27T08:31:25.25 0.1 undecidable manual P 44 22.0668 115 0.08 99
IV.MOCL.EHZ. 2021-06-27T08:31:25.70 0.3 undecidable manual P 360 24.0537 50 0.21 72
IV.RUFI.EHZ. 2021-06-27T08:31:25.93 0.1 undecidable manual P 78 26.751 50 0.04 99
IV.MPPT.EHZ. 2021-06-27T08:31:24.89 0.1 undecidable manual P 339 20.2686 117 0.05 100
IV.CRMI.HHZ. 2021-06-27T08:31:24.24 0.1 undecidable manual P 273 16.2726 123 0.08 100
IV.FIR.HHZ. 2021-06-27T08:31:24.32 0.3 undecidable manual S 104 5.994 150 -0.14 75
IV.OSSC.HHZ. 2021-06-27T08:31:23.37 3.0 undecidable manual P 0
IV.FIR.HHZ. 2021-06-27T08:31:22.87 0.3 undecidable manual P 104 5.994 150 0.18 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRMI.HHN. ML:0.7 0.0000422 0.36 AML other m 2021-06-27T08:31:27.24
IV.CRMI.HHE. ML:0.4 0.000021949999999999998 0.84 AML other m 2021-06-27T08:31:27.53
IV.MPPT.EHE. ML:0.7 0.000036400000000000004 0.52 AML other m 2021-06-27T08:31:28.86
IV.MPPT.EHN. ML:0.7 0.00003825000000000001 0.22 AML other m 2021-06-27T08:31:28.84
IV.OSSC.HHN. ML:0.5 0.000013832830000000001 0.2432 AML other m 2021-06-27T08:31:30.42
IV.OSSC.HHE. ML:0.5 0.000016001289000000002 0.224 AML other m 2021-06-27T08:31:30.54
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