Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 07-08-2022 and time 12:01:25 (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 10:01:25 (UTC)
  • 07-08-2022 12:01:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6640, 11.2630 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 6 17062 31677
Greve in Chianti FI 10 13862 45539
Bagno a Ripoli FI 11 25611 71150
Firenze FI 12 382808 453958
Scandicci FI 12 50609 504567
Tavarnelle Val di Pesa FI 13 7800 512367
Figline e Incisa Valdarno FI 15 23505 535872
Montespertoli FI 15 13537 549409
Barberino Val d'Elsa FI 15 4386 553795
Fiesole FI 16 13969 567764
Rignano sull'Arno FI 17 8651 576415
Lastra a Signa FI 17 20156 596571
Signa FI 19 19179 615750
Pontassieve FI 19 20603 636353
Sesto Fiorentino FI 20 48958 685311

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)
39 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)
78 Km E of Livorno (159219 inhabitants)
84 Km E of Viareggio (62467 inhabitants)
85 Km SW of Imola (69797 inhabitants)
85 Km SW of Faenza (58541 inhabitants)
88 Km SW of Forlì (117913 inhabitants)
93 Km S of Bologna (386663 inhabitants)
95 Km SW of Cesena (96758 inhabitants)
99 Km E of Massa (69479 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
10:01:25		 43.6637 11.2627 8 2023-01-31
19:03:44		 Bollettino Sismico Italiano INGV 109666591
Reviewed
Rev100 		ML 1.1 2022-08-07
10:01:25		 43.6593 11.2657 8 2022-08-07
10:14:13		 Sala Sismica INGV-Roma 108228191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-08-07 10:01:25 ± 0.09
Latitude 43.6637 ± 0.0036
Longitude 11.2627 ± 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 109666591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 448
Semi-minor axis of confidence ellipse (meter) 201
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 270
Circular confidence region, given by single value of horizontal uncertainty (meter) 450.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 92
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.01439
Epicentral distance of station farthest from the epicenter (degree) 0.31926
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 109666591
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-09-13 13:47:49

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 108228191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-08-07 10:14:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MPPT.EHZ. 2022-08-07T10:01:37.70 0.3 undecidable manual S 337 35.4423 50 -0.34 67
IV.BOSL.HHE. 2022-08-07T10:01:36.60 0.3 undecidable manual S 17 30.9468 105 0 73
IV.CRMI.HHZ. 2022-08-07T10:01:35.20 0.3 undecidable manual S 303 27.0507 107 -0.08 72
IV.RUFI.EHZ. 2022-08-07T10:01:35.50 0.3 undecidable manual S 46 27.6501 106 0.01 73
IV.CSNT.HHZ. 2022-08-07T10:01:33.10 0.3 undecidable manual S 174 21.2676 111 -0.28 70
IV.MPPT.EHZ. 2022-08-07T10:01:33.08 0.6 undecidable manual P 337 35.4423 50 0.34 45
IV.BOSL.HHE. 2022-08-07T10:01:31.98 0.3 undecidable manual P 17 30.9468 105 0.08 72
ZH.T1646.EHZ. 2022-08-07T10:01:31.10 0.3 undecidable manual S 268 12.3765 123 0.47 68
IV.RUFI.EHZ. 2022-08-07T10:01:31.49 0.3 undecidable manual P 46 27.6501 106 0.22 70
IV.OSSC.HHZ. 2022-08-07T10:01:31.40 0.3 undecidable manual S 185 15.5733 118 -0.19 72
IV.CSNT.HHZ. 2022-08-07T10:01:30.43 0.6 undecidable manual P 174 21.2676 111 0.39 46
IV.CRMI.HHZ. 2022-08-07T10:01:30.88 0.3 undecidable manual P 303 27.0507 107 -0.26 70
ZH.T1646.EHZ. 2022-08-07T10:01:28.59 0.3 undecidable manual P 268 12.3765 123 0.13 73
ZH.T1648.EHZ. 2022-08-07T10:01:28.30 0.3 undecidable manual S 82 1.5984 169 -0.07 76
IV.OSSC.HHZ. 2022-08-07T10:01:28.96 0.3 undecidable manual P 185 15.5733 118 -0.05 74
ZH.T1614.HNZ. 2022-08-07T10:01:28.60 0.3 undecidable manual S 333 6.0939 143 -0.43 70
ZH.T1614.HNZ. 2022-08-07T10:01:27.63 0.1 undecidable manual P 333 6.0939 143 0.1 99
ZH.T1648.EHZ. 2022-08-07T10:01:27.26 0.1 undecidable manual P 82 1.5984 169 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:1.2 0.00014841300000000002 0.096 AML other m 2022-08-07T10:01:31.68
IV.OSSC.HHN. ML:1.0 0.00009168569 0.704 AML other m 2022-08-07T10:01:32.60
IV.RUFI.EHN. ML:1.2 0.00008599852 0.3616 AML other m 2022-08-07T10:01:34.85
IV.CSNT.HHE. ML:0.9 0.000060125819999999994 0.1984 AML other m 2022-08-07T10:01:35.40
IV.RUFI.EHE. ML:1.2 0.00008254431149999999 0.0032 AML other m 2022-08-07T10:01:36.80
IV.CSNT.HHN. ML:0.8 0.000051234475000000004 0.6208 AML other m 2022-08-07T10:01:37.25
IV.CRMI.HNE. ML:1.4 0.00014478950000000002 0.72 AML other m 2022-08-07T10:01:37.62
IV.ASQU.HHN. ML:1.2 0.000046016635 0.4448 AML other m 2022-08-07T10:01:39.70
IV.CRMI.HHN. ML:0.9 0.000046594455 0.624 AML other m 2022-08-07T10:01:39.60
IV.CRMI.HNN. ML:1.7 0.00027098275 0.1184 AML other m 2022-08-07T10:01:39.60
IV.CRMI.HHE. ML:0.6 0.00002378723 0.3808 AML other m 2022-08-07T10:01:39.97
IV.ASQU.HHE. ML:1.1 0.00004087412 0.9184 AML other m 2022-08-07T10:01:42.15
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