Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 27-06-2021 and time 00:38:06 (Italy) in region 5 km S Gambassi Terme (FI)

A magnitude ML 1.3 earthquake occured in region: 5 km S Gambassi Terme (FI), on

  • 26-06-2021 22:38:06 (UTC)
  • 27-06-2021 00:38:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4940, 10.9720 at 7 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
Gambassi Terme FI 5 4870 4870
San Gimignano SI 6 7820 12690
Montaione FI 8 3700 16390
Certaldo FI 8 16121 32511
Castelfiorentino FI 13 17504 50015
Volterra PI 14 10519 60534
Colle di Val d'Elsa SI 14 21620 82154
Poggibonsi SI 14 29196 111350
Barberino Val d'Elsa FI 17 4386 115736
Tavarnelle Val di Pesa FI 18 7800 123536
Casole d'Elsa SI 18 3897 127433
Montespertoli FI 19 13537 140970
Lajatico PI 20 1336 142306

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SW of Scandicci (50609 inhabitants)
35 Km NW of Siena (53903 inhabitants)
38 Km SW of Firenze (382808 inhabitants)
44 Km S of Prato (191150 inhabitants)
49 Km S of Pistoia (90315 inhabitants)
52 Km E of Pisa (89158 inhabitants)
54 Km E of Livorno (159219 inhabitants)
54 Km SE of Lucca (89046 inhabitants)
71 Km SE of Viareggio (62467 inhabitants)
74 Km W of Arezzo (99543 inhabitants)
82 Km N of Grosseto (82087 inhabitants)
90 Km SE of Massa (69479 inhabitants)
96 Km SE of Carrara (63133 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 1.3 2021-06-26
22:38:06		 43.494 10.9723 7 2021-12-29
11:12:47		 Bollettino Sismico Italiano INGV 97174881
Reviewed
Rev100 		ML 1.3 2021-06-26
22:38:06		 43.5012 10.9587 2 2021-06-26
22:46:33		 Sala Sismica INGV-Roma 91942211
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-06-26 22:38:06 ± 0.11
Latitude 43.4940 ± 0.0054
Longitude 10.9723 ± 0.0099
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 97174881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 643
Semi-minor axis of confidence ellipse (meter) 638
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 224
Circular confidence region, given by single value of horizontal uncertainty (meter) 640.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 79
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.20055
Epicentral distance of station farthest from the epicenter (degree) 0.63042
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:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 15
Type of magnitude ML
Reference to an origin 91942211
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-06-26 22:46:33

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 15
Type of magnitude ML
Reference to an origin 97174881
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-11-02 17:42:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PII.HHZ. 2021-06-26T22:38:20.60 0.6 undecidable manual S 305 43.9227 50 -1.2 34
IV.TRIF.CHZ. 2021-06-26T22:38:20.65 0.6 undecidable manual S 188 42.4242 50 -0.75 42
IV.MAGO.CHE. 2021-06-26T22:38:19.09 0.6 undecidable manual S 226 35.2425 102 -0.15 51
IV.BDI.HHZ. 2021-06-26T22:38:19.62 0.3 undecidable manual P 335 69.9744 50 0.17 71
GU.POPM.HHZ. 2021-06-26T22:38:18.65 0.3 undecidable manual P 344 63.492 50 0.19 71
IV.MOCL.EHN. 2021-06-26T22:38:18.27 0.3 undecidable manual P 16 59.0964 50 0.5 67
IV.FROS.CHZ. 2021-06-26T22:38:18.63 0.3 undecidable manual S 155 34.8429 102 -0.47 71
GU.MAIM.HHZ. 2021-06-26T22:38:18.02 0.1 undecidable manual P 320 60.3951 50 0.04 99
IV.CRMI.HHZ. 2021-06-26T22:38:17.93 0.6 undecidable manual S 1 33.4443 102 -0.71 43
IV.MPPT.EHN. 2021-06-26T22:38:16.76 0.3 undecidable manual P 10 52.3032 50 0.03 75
IV.TRIF.CHZ. 2021-06-26T22:38:15.79 0.3 undecidable manual P 188 42.4242 50 0.58 67
IV.CSNT.HHZ. 2021-06-26T22:38:15.69 0.3 undecidable manual S 95 25.6521 106 -0.33 74
IV.PII.HHZ. 2021-06-26T22:38:15.23 0.3 undecidable manual P 305 43.9227 50 -0.22 74
IV.OSSC.HHZ. 2021-06-26T22:38:14.54 0.6 undecidable manual S 81 22.2555 108 -0.33 50
IV.FROS.CHZ. 2021-06-26T22:38:14.09 0.1 undecidable manual P 155 34.8429 102 0.21 100
IV.MAGO.CHE. 2021-06-26T22:38:14.34 0.3 undecidable manual P 226 35.2425 102 0.38 72
IV.CRMI.HHZ. 2021-06-26T22:38:13.67 0.3 undecidable manual P 1 33.4443 102 0.06 78
IV.CSNT.HHZ. 2021-06-26T22:38:12.22 0.3 undecidable manual P 95 25.6521 106 0.12 78
IV.OSSC.HHZ. 2021-06-26T22:38:11.76 0.1 undecidable manual P 81 22.2555 108 0.32 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:1.5 0.000211264045 0.2304 AML other m 2021-06-26T22:38:15.27
IV.OSSC.HHN. ML:1.5 0.00021261744999999998 0.2944 AML other m 2021-06-26T22:38:15.79
IV.CRMI.HHE. ML:0.9 0.000036932229999999994 0.0768 AML other m 2021-06-26T22:38:18.19
IV.CRMI.HHN. ML:1.0 0.000046903274999999994 0.1024 AML other m 2021-06-26T22:38:18.33
IV.FROS.CHN. ML:1.3 0.00008748075499999999 0.128 AML other m 2021-06-26T22:38:20.44
IV.FROS.CHE. ML:1.5 0.0001404251 0.2944 AML other m 2021-06-26T22:38:21.50
IV.PII.HHE. ML:1.4 0.000068468185 0.3072 AML other m 2021-06-26T22:38:22.16
IV.TRIF.CHN. ML:1.3 0.000062229885 0.128 AML other m 2021-06-26T22:38:22.32
IV.PII.HHN. ML:1.4 0.00008199999999999999 0.24 AML other m 2021-06-26T22:38:22.43
IV.TRIF.CHE. ML:1.4 0.00008790000000000001 0.36 AML other m 2021-06-26T22:38:22.77
GU.MAIM.HHN. ML:1.1 0.0000233785575 0.32 AML other m 2021-06-26T22:38:25.52
GU.POPM.HHE. ML:1.2 0.000029262074999999997 1.7184 AML other m 2021-06-26T22:38:27.05
GU.POPM.HHN. ML:1.3 0.0000378 0.14 AML other m 2021-06-26T22:38:27.53
IV.BDI.HHN. ML:1.1 0.000020164385 0.3584 AML other m 2021-06-26T22:38:28.78
IV.BDI.HHE. ML:1.3 0.00003345 0.36 AML other m 2021-06-26T22:38:31.26
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