Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 03-05-2022 and time 22:23:28 (Italy) in region 4 km SW Impruneta (FI)

A magnitude ML 1.2 earthquake occured in region: 4 km SW Impruneta (FI), on

  • 03-05-2022 20:23:28 (UTC)
  • 03-05-2022 22:23:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6600, 11.2300 at 7 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 4 14615 14615
San Casciano in Val di Pesa FI 4 17062 31677
Greve in Chianti FI 11 13862 45539
Scandicci FI 12 50609 96148
Tavarnelle Val di Pesa FI 12 7800 103948
Montespertoli FI 13 13537 117485
Firenze FI 13 382808 500293
Bagno a Ripoli FI 13 25611 525904
Barberino Val d'Elsa FI 14 4386 530290
Lastra a Signa FI 16 20156 550446
Fiesole FI 17 13969 564415
Signa FI 17 19179 583594
Figline e Incisa Valdarno FI 18 23505 607099
Montelupo Fiorentino FI 19 14098 621197
Campi Bisenzio FI 19 46166 667363
Rignano sull'Arno FI 19 8651 676014
Sesto Fiorentino FI 19 48958 724972
Certaldo FI 20 16121 741093

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km SE of Scandicci (50609 inhabitants)
13 Km S of Firenze (382808 inhabitants)
27 Km SE of Prato (191150 inhabitants)
39 Km N of Siena (53903 inhabitants)
40 Km SE of Pistoia (90315 inhabitants)
57 Km W of Arezzo (99543 inhabitants)
62 Km E of Lucca (89046 inhabitants)
67 Km E of Pisa (89158 inhabitants)
75 Km E of Livorno (159219 inhabitants)
82 Km E of Viareggio (62467 inhabitants)
86 Km SW of Imola (69797 inhabitants)
87 Km SW of Faenza (58541 inhabitants)
90 Km SW of Forlì (117913 inhabitants)
93 Km S of Bologna (386663 inhabitants)
97 Km E of Massa (69479 inhabitants)
97 Km SW of Cesena (96758 inhabitants)
100 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
Reviewed
Rev100 		ML 1.2 2022-05-03
20:23:28		 43.6597 11.2303 7 2022-05-03
20:34:39		 Sala Sismica INGV-Roma 104142711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-05-03 20:23:28 ± 0.07
Latitude 43.6597 ± 0.0027
Longitude 11.2303 ± 0.0062
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 104142711

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 429
Semi-minor axis of confidence ellipse (meter) 194
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 265
Circular confidence region, given by single value of horizontal uncertainty (meter) 430.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 102
Number of associated phases, regardless of their use for origin computation 19
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.52341
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 104142711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-05-03 20:34:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BRSN.HNZ. 2022-05-03T20:23:57.08 3.0 undecidable manual S -0.09 0
IV.CRE.HHZ. 2022-05-03T20:23:47.46 0.3 undecidable manual S 94 58.0974 50 0.25 68
IV.PII.HHZ. 2022-05-03T20:23:46.44 0.3 undecidable manual S 277 56.9985 50 -0.48 65
IV.SEI.HHZ. 2022-05-03T20:23:43.89 0.3 undecidable manual S 13 44.9217 50 0.18 70
IV.MPPT.EHZ. 2022-05-03T20:23:41.00 0.3 undecidable manual S 341 34.8429 101 0.36 69
IV.MOCL.EHZ. 2022-05-03T20:23:41.86 0.3 undecidable manual S 354 38.5281 100 -0.01 74
IV.BOSL.HHZ. 2022-05-03T20:23:39.69 0.3 undecidable manual S 21 32.2455 102 -0.05 74
IV.CRE.HHZ. 2022-05-03T20:23:39.07 0.1 undecidable manual P 94 58.0974 50 -0.15 92
IV.PII.HHZ. 2022-05-03T20:23:39.25 0.1 undecidable manual P 277 56.9985 50 0.2 92
IV.RUFI.EHZ. 2022-05-03T20:23:38.54 0.3 undecidable manual S 48 29.8479 103 -0.4 69
IV.SEI.HHZ. 2022-05-03T20:23:37.36 1.0 negative manual P 13 44.9217 50 0.16 24
IV.BOSL.HHZ. 2022-05-03T20:23:35.09 0.1 undecidable manual P 21 32.2455 102 0.19 96
IV.CSNT.HHZ. 2022-05-03T20:23:35.82 0.3 undecidable manual S 167 21.2676 108 -0.23 73
IV.MPPT.EHZ. 2022-05-03T20:23:35.37 0.1 undecidable manual P 341 34.8429 101 -0.06 98
IV.MOCL.EHZ. 2022-05-03T20:23:35.92 0.1 undecidable manual P 354 38.5281 100 -0.22 94
IV.RUFI.EHZ. 2022-05-03T20:23:34.45 0.1 undecidable manual P 48 29.8479 103 0.01 100
IV.OSSC.HHZ. 2022-05-03T20:23:34.33 0.3 undecidable manual S 175 15.1737 114 0.26 73
IV.CSNT.HHZ. 2022-05-03T20:23:32.68 0.3 negative manual P 167 21.2676 108 -0.1 75
IV.OSSC.HHZ. 2022-05-03T20:23:31.92 0.6 undecidable manual P 175 15.1737 114 0.29 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:1.5 0.0003175 0.64 AML other m 2022-05-03T20:23:34.51
IV.OSSC.HHN. ML:1.3 0.00019 0.54 AML other m 2022-05-03T20:23:35.70
IV.CSNT.HHE. ML:1.2 0.00010700000000000001 0.34 AML other m 2022-05-03T20:23:37.95
IV.CSNT.HHN. ML:1.1 0.0000964 0.56 AML other m 2022-05-03T20:23:39.60
IV.BOSL.HHN. ML:0.9 0.000041800000000000006 1.12 AML other m 2022-05-03T20:23:39.34
IV.BOSL.HHE. ML:1.2 0.00006695 0.18 AML other m 2022-05-03T20:23:39.97
IV.MPPT.EHE. ML:0.9 0.0000276 0.68 AML other m 2022-05-03T20:23:41.41
IV.MPPT.EHN. ML:0.7 0.00001975 0.98 AML other m 2022-05-03T20:23:42.06
IV.MOCL.EHN. ML:1.3 0.0000692 0.6 AML other m 2022-05-03T20:23:42.69
IV.MOCL.EHE. ML:1.3 0.00007535 1.82 AML other m 2022-05-03T20:23:43.02
IV.PII.HHE. ML:1.3 0.000042050000000000006 1.62 AML other m 2022-05-03T20:23:46.86
IV.PII.HHN. ML:1.3 0.0000414 1.66 AML other m 2022-05-03T20:23:50.00
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