Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 07-08-2022 and time 13:40:17 (Italy) in region 3 km S Impruneta (FI)

A magnitude ML 1.1 earthquake occured in region: 3 km S Impruneta (FI), on

  • 07-08-2022 11:40:17 (UTC)
  • 07-08-2022 13:40:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6600, 11.2510 at 8 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
Impruneta FI 3 14615 14615
San Casciano in Val di Pesa FI 5 17062 31677
Greve in Chianti FI 10 13862 45539
Bagno a Ripoli FI 12 25611 71150
Firenze FI 12 382808 453958
Scandicci FI 12 50609 504567
Tavarnelle Val di Pesa FI 13 7800 512367
Montespertoli FI 14 13537 525904
Barberino Val d'Elsa FI 15 4386 530290
Figline e Incisa Valdarno FI 16 23505 553795
Fiesole FI 17 13969 567764
Lastra a Signa FI 17 20156 587920
Rignano sull'Arno FI 18 8651 596571
Signa FI 18 19179 615750
Sesto Fiorentino FI 20 48958 664708

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km S of Firenze (382808 inhabitants)
12 Km SE of Scandicci (50609 inhabitants)
28 Km SE of Prato (191150 inhabitants)
38 Km N of Siena (53903 inhabitants)
41 Km SE of Pistoia (90315 inhabitants)
55 Km W of Arezzo (99543 inhabitants)
64 Km E of Lucca (89046 inhabitants)
69 Km E of Pisa (89158 inhabitants)
77 Km E of Livorno (159219 inhabitants)
84 Km E of Viareggio (62467 inhabitants)
86 Km SW of Imola (69797 inhabitants)
86 Km SW of Faenza (58541 inhabitants)
89 Km SW of Forlì (117913 inhabitants)
93 Km S of Bologna (386663 inhabitants)
96 Km SW of Cesena (96758 inhabitants)
98 Km E of Massa (69479 inhabitants)
101 Km N of Grosseto (82087 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 1.1 2022-08-07
11:40:17		 43.6598 11.2512 8 2023-01-31
19:03:44		 Bollettino Sismico Italiano INGV 109667371
Reviewed
Rev100 		ML 1.2 2022-08-07
11:40:17		 43.6618 11.2608 8 2022-08-07
12:04:36		 Sala Sismica INGV-Roma 108231451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-08-07 11:40:17 ± 0.08
Latitude 43.6598 ± 0.0036
Longitude 11.2512 ± 0.0062
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 109667371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 480
Semi-minor axis of confidence ellipse (meter) 333
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 249
Circular confidence region, given by single value of horizontal uncertainty (meter) 480.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.02338
Epicentral distance of station farthest from the epicenter (degree) 0.49463
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:1.2

Field Value
Value 1.2
Uncertainty 0.5
Num. used stations 8
Type of magnitude ML
Reference to an origin 108231451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-08-07 12:04:36

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 109667371
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-09-13 14:21:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MOCL.EHZ. 2022-08-07T11:40:30.50 0.3 undecidable manual S 352 38.7279 50 0.02 72
IV.MPPT.EHZ. 2022-08-07T11:40:29.20 0.3 undecidable manual S 339 35.4423 50 -0.41 66
IV.BOSL.HHZ. 2022-08-07T11:40:28.50 0.6 undecidable manual S 18 31.6461 105 0.04 48
IV.CRMI.HHZ. 2022-08-07T11:40:27.00 0.3 undecidable manual S 305 26.4513 108 0.27 70
IV.RUFI.EHE. 2022-08-07T11:40:27.07 0.6 undecidable manual S 46 28.6491 106 -0.38 45
IV.SFI.EHZ. 2022-08-07T11:40:27.04 0.6 undecidable manual P 60 54.9006 50 -0.28 44
IV.ASQU.HHZ. 2022-08-07T11:40:26.01 0.6 undecidable manual P 70 45.7209 50 0.1 46
IV.MOCL.EHZ. 2022-08-07T11:40:25.79 0.6 undecidable manual P 352 38.7279 50 0.97 36
IV.MPPT.EHZ. 2022-08-07T11:40:24.24 0.3 undecidable manual P 339 35.4423 50 -0.08 71
IV.CSNT.HHZ. 2022-08-07T11:40:24.90 0.3 undecidable manual S 171 20.9679 112 -0.03 74
IV.RUFI.EHE. 2022-08-07T11:40:23.36 0.6 undecidable manual P 46 28.6491 106 0.28 46
IV.BOSL.HHZ. 2022-08-07T11:40:23.70 0.3 undecidable manual P 18 31.6461 105 0.04 72
IV.OSSC.HHZ. 2022-08-07T11:40:23.20 0.3 undecidable manual S 182 15.0738 119 0.1 73
IV.CRMI.HHZ. 2022-08-07T11:40:22.50 0.3 undecidable manual P 305 26.4513 108 -0.16 71
ZH.T1646.EHZ. 2022-08-07T11:40:21.50 0.3 undecidable manual S 270 11.4774 126 -0.52 67
IV.CSNT.HHZ. 2022-08-07T11:40:21.36 0.3 undecidable manual P 171 20.9679 112 -0.26 70
IV.OSSC.HHZ. 2022-08-07T11:40:20.68 0.3 undecidable manual P 182 15.0738 119 0.12 73
ZH.T1648.EHZ. 2022-08-07T11:40:20.00 0.3 undecidable manual S 76 2.5974 163 -0.15 74
ZH.T1646.EHZ. 2022-08-07T11:40:20.32 0.3 undecidable manual P 270 11.4774 126 0.38 70
ZH.T1614.HNZ. 2022-08-07T11:40:20.70 0.3 undecidable manual S 343 6.1938 144 -0.01 76
ZH.T1614.HNZ. 2022-08-07T11:40:19.31 0.1 undecidable manual P 343 6.1938 144 0.12 99
ZH.T1648.EHZ. 2022-08-07T11:40:18.96 0.1 undecidable manual P 76 2.5974 163 0.1 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
ZH.T1646.EHN. ML:1.3 0.00023116425 0.2368 AML other m 2022-08-07T11:40:26.78
IV.CRMI.HHE. ML:0.6 0.000022049334999999998 0.2816 AML other m 2022-08-07T11:40:27.19
IV.CRMI.HNE. ML:1.2 0.000083965745 0.9856 AML other m 2022-08-07T11:40:27.69
IV.CRMI.HHN. ML:0.8 0.00003565 0.16 AML other m 2022-08-07T11:40:27.38
IV.CRMI.HNN. ML:1.0 0.000055279715 0.3712 AML other m 2022-08-07T11:40:27.56
ZH.T1646.EHE. ML:1.3 0.000272 0.26 AML other m 2022-08-07T11:40:27.59
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