Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.7 on date 11-05-2022 and time 17:04:28 (UTC) in region 3 km S Impruneta (FI)

A magnitude ML 0.7 earthquake occured in region: 3 km S Impruneta (FI), on

  • 11-05-2022 17:04:28 (UTC)
  • 11-05-2022 19:04:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6640, 11.2580 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 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
Montespertoli FI 15 13537 525904
Barberino Val d'Elsa FI 15 4386 530290
Figline e Incisa Valdarno FI 16 23505 553795
Fiesole FI 16 13969 567764
Lastra a Signa FI 17 20156 587920
Rignano sull'Arno FI 17 8651 596571
Signa FI 18 19179 615750
Pontassieve FI 19 20603 636353
Sesto Fiorentino FI 19 48958 685311
Campi Bisenzio FI 20 46166 731477

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km S of Firenze (382808 inhabitants)
12 Km SE of Scandicci (50609 inhabitants)
27 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)
77 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 0.7 2022-05-11
17:04:28		 43.6643 11.2583 8 2023-01-31
19:03:29		 Bollettino Sismico Italiano INGV 108013721
Reviewed
Rev100 		ML 0.7 2022-05-11
17:04:28		 43.6642 11.2527 6 2022-05-11
17:10:14		 Sala Sismica INGV-Roma 104502191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-05-11 17:04:28 ± 0.08
Latitude 43.6643 ± 0.0027
Longitude 11.2583 ± 0.0050
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 108013721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 396
Semi-minor axis of confidence ellipse (meter) 268
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 264
Circular confidence region, given by single value of horizontal uncertainty (meter) 400.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 83
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.34444
Number of stations at which the event was observed 20
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 108013721
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-08-02 12:22:20

ML:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 104502191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-05-11 17:10:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
AC.SRN.HHZ. 2022-05-11T17:06:01.33 3.0 undecidable manual Pn -7.9 0
IV.GATE.HHZ. 2022-05-11T17:05:46.15 3.0 undecidable manual Sn -7.19 0
IV.POFI.HHZ. 2022-05-11T17:05:35.98 3.0 undecidable manual Sg 3.09 0
IV.MCRV.HHZ. 2022-05-11T17:05:28.86 3.0 undecidable manual Pg 8.65 0
MN.TRI.HHZ. 2022-05-11T17:05:09.26 3.0 positive manual Pg 1.83 0
IV.PTRJ.HHZ. 2022-05-11T17:05:04.18 3.0 undecidable manual Pn -5.99 0
IV.POFI.HNZ. 2022-05-11T17:04:59.75 3.0 undecidable manual Pg -0.97 0
GU.GSCL.HHZ. 2022-05-11T17:04:57.42 3.0 undecidable manual Sn 1.72 0
IV.IMOL.HNZ. 2022-05-11T17:04:57.89 3.0 undecidable manual Sn -1.6 0
OX.MARN.HHZ. 2022-05-11T17:04:55.82 3.0 undecidable manual Pg -0.31 0
ST.VARA.EHZ. 2022-05-11T17:04:52.63 3.0 undecidable manual Pn -5.8 0
IV.FDMO.HHZ. 2022-05-11T17:04:42.72 3.0 undecidable manual Pn -4.88 0
IV.MOCL.EHZ. 2022-05-11T17:04:41.71 0.6 undecidable manual S 351 38.2284 50 -0.01 47
IV.BOSL.HHZ. 2022-05-11T17:04:39.43 0.6 undecidable manual S 17 30.9468 105 -0.12 46
IV.RUFI.EHZ. 2022-05-11T17:04:38.42 0.3 undecidable manual S 46 27.8499 107 -0.08 71
IV.CRMI.HHZ. 2022-05-11T17:04:37.90 0.6 undecidable manual S 303 26.6511 107 -0.21 46
IV.MOCL.EHZ. 2022-05-11T17:04:36.07 0.3 undecidable manual P 351 38.2284 50 -0.03 70
IV.CSNT.HHZ. 2022-05-11T17:04:35.95 0.6 undecidable manual S 173 21.3675 111 -0.43 44
IV.OSSC.HHZ. 2022-05-11T17:04:34.31 0.6 undecidable manual S 184 15.6732 118 -0.26 46
IV.RUFI.EHZ. 2022-05-11T17:04:34.40 0.1 undecidable manual P 46 27.8499 107 0.16 93
IV.BOSL.HHZ. 2022-05-11T17:04:34.91 0.3 undecidable manual P 17 30.9468 105 0.06 71
IV.CSNT.HHZ. 2022-05-11T17:04:33.45 0.3 undecidable manual P 173 21.3675 111 0.43 66
IV.CRMI.HHZ. 2022-05-11T17:04:33.77 0.3 undecidable manual P 303 26.6511 107 -0.25 68
ZH.T1646.EHN. 2022-05-11T17:04:33.90 0.6 undecidable manual S 267 12.0768 125 0.41 45
ZH.T1647.EHZ. 2022-05-11T17:04:32.44 0.6 undecidable manual S 146 7.6812 137 0.1 49
ZH.T1646.EHN. 2022-05-11T17:04:31.50 0.3 undecidable manual P 267 12.0768 125 0.15 72
ZH.T1648.HNN. 2022-05-11T17:04:31.27 0.3 undecidable manual S 86 1.8981 167 -0.1 74
IV.OSSC.HHZ. 2022-05-11T17:04:31.81 0.1 undecidable manual P 184 15.6732 118 -0.16 95
ZH.T1648.HNN. 2022-05-11T17:04:30.13 0.1 undecidable manual P 86 1.8981 167 0 100
ZH.T1647.EHZ. 2022-05-11T17:04:30.82 0.1 undecidable manual P 146 7.6812 137 0.13 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:1.0 0.00009185 1.42 AML other m 2022-05-11T17:04:35.02
IV.OSSC.HHN. ML:0.8 0.0000624 0.72 AML other m 2022-05-11T17:04:35.43
IV.CRMI.HHN. ML:0.6 0.000026349999999999997 0.28 AML other m 2022-05-11T17:04:38.44
IV.CSNT.HHE. ML:0.8 0.00004235 1.3 AML other m 2022-05-11T17:04:39.71
IV.CSNT.HHN. ML:0.8 0.00003835 0.92 AML other m 2022-05-11T17:04:39.62
IV.BOSL.HHE. ML:0.6 0.000021400000000000002 1.56 AML other m 2022-05-11T17:04:39.78
IV.CRMI.HHE. ML:0.4 0.0000155 1.26 AML other m 2022-05-11T17:04:40.27
IV.BOSL.HHN. ML:0.5 0.0000161 0.16 AML other m 2022-05-11T17:04:40.46
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