Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 09-05-2022 and time 07:35:06 (Italy) in region 3 km S Impruneta (FI)

A magnitude ML 1.2 earthquake occured in region: 3 km S Impruneta (FI), on

  • 09-05-2022 05:35:06 (UTC)
  • 09-05-2022 07:35:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6610, 11.2460 at 6 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 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
Scandicci FI 12 50609 121759
Firenze FI 12 382808 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
Lastra a Signa FI 17 20156 573951
Fiesole FI 17 13969 587920
Signa FI 18 19179 607099
Rignano sull'Arno FI 18 8651 615750
Sesto Fiorentino FI 20 48958 664708
Montelupo Fiorentino FI 20 14098 678806
Campi Bisenzio FI 20 46166 724972

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km SE of Scandicci (50609 inhabitants)
12 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)
56 Km W of Arezzo (99543 inhabitants)
63 Km E of Lucca (89046 inhabitants)
68 Km E of Pisa (89158 inhabitants)
76 Km E of Livorno (159219 inhabitants)
83 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)
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 2022-05-09
05:35:06		 43.6612 11.2463 6 2022-05-09
05:41:08		 Sala Sismica INGV-Roma 104380871
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-05-09 05:35:06 ± 0.05
Latitude 43.6612 ± 0.0018
Longitude 11.2463 ± 0.0037
Depth (km) 6 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 104380871

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 254
Semi-minor axis of confidence ellipse (meter) 240
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 90
Circular confidence region, given by single value of horizontal uncertainty (meter) 250.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 125
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.51171
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 104380871
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-05-09 05:41:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PZUN.HHZ. 2022-05-09T05:37:04.95 3.0 undecidable manual Sn -0.58 0
MN.BNI.HHZ. 2022-05-09T05:36:46.84 3.0 undecidable manual Sn 4.47 0
IV.NOCI.HHZ. 2022-05-09T05:36:36.09 3.0 negative manual Pg 14.06 0
OT.OT15.EHZ. 2022-05-09T05:36:35.88 3.0 negative manual Pg 17.91 0
IV.AGLI.HHZ. 2022-05-09T05:36:26.21 3.0 undecidable manual Sn -0.64 0
IV.BARO.EHZ. 2022-05-09T05:35:49.96 3.0 undecidable manual Sn -1.92 0
GU.RNCA.HHZ. 2022-05-09T05:35:41.13 3.0 undecidable manual Pg 4.68 0
IV.BAG8.EHZ. 2022-05-09T05:35:39.89 3.0 undecidable manual Pn -2.11 0
IV.MC2.EHZ. 2022-05-09T05:35:32.41 3.0 undecidable manual Pn -0.43 0
IV.PARC.HHZ. 2022-05-09T05:35:32.12 3.0 undecidable manual S 0.54 0
IV.SERM.EHZ. 2022-05-09T05:35:30.62 3.0 undecidable manual P 0.72 0
IV.CRE.HHZ. 2022-05-09T05:35:24.76 0.3 undecidable manual S 94 56.7987 50 -0.01 71
IV.SEI.HHZ. 2022-05-09T05:35:21.47 0.1 undecidable manual S 12 44.5221 50 -0.02 96
IV.ARCI.HHZ. 2022-05-09T05:35:19.18 3.0 undecidable manual P -2.48 0
IV.MPPT.EHZ. 2022-05-09T05:35:18.31 0.1 undecidable manual S 339 35.1426 100 -0.1 96
IV.PII.HHZ. 2022-05-09T05:35:17.15 3.0 undecidable manual P 0.41 0
IV.BOSL.HHZ. 2022-05-09T05:35:17.03 0.3 undecidable manual S 19 31.6461 101 -0.18 72
IV.RUFI.EHZ. 2022-05-09T05:35:16.22 0.1 undecidable manual S 47 28.8489 102 -0.02 99
IV.CRE.HHZ. 2022-05-09T05:35:16.84 0.1 undecidable manual P 94 56.7987 50 -0.01 94
IV.CRMI.HHZ. 2022-05-09T05:35:15.53 0.3 undecidable manual S 305 26.0517 103 0.21 72
IV.SEI.HHZ. 2022-05-09T05:35:14.98 0.1 undecidable manual P 12 44.5221 50 0.02 96
IV.CSNT.HHZ. 2022-05-09T05:35:13.49 0.1 undecidable manual S 170 21.1677 106 -0.17 97
IV.BOSL.HHZ. 2022-05-09T05:35:12.67 0.1 undecidable manual P 19 31.6461 101 0.19 95
IV.MPPT.EHZ. 2022-05-09T05:35:12.93 0.1 undecidable manual P 339 35.1426 100 -0.25 93
IV.RUFI.EHZ. 2022-05-09T05:35:12.16 0.1 positive manual P 47 28.8489 102 0.23 95
IV.CRMI.HHZ. 2022-05-09T05:35:11.37 0.1 undecidable manual P 305 26.0517 103 -0.02 99
IV.OSSC.HHZ. 2022-05-09T05:35:11.68 0.3 undecidable manual S 180 15.2736 112 -0.04 76
IV.CSNT.HHZ. 2022-05-09T05:35:10.40 0.1 undecidable manual P 170 21.1677 106 -0.04 100
IV.OSSC.HHZ. 2022-05-09T05:35:09.60 0.3 undecidable manual P 180 15.2736 112 0.28 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:1.4 0.0002545 0.98 AML other m 2022-05-09T05:35:12.28
IV.OSSC.HHN. ML:1.2 0.000184 1.66 AML other m 2022-05-09T05:35:13.02
IV.CRMI.HHN. ML:1.2 0.00008695 0.58 AML other m 2022-05-09T05:35:16.32
IV.CSNT.HHE. ML:1.2 0.0001285 0.7 AML other m 2022-05-09T05:35:16.46
IV.RUFI.EHN. ML:1.2 0.00008655 0.24 AML other m 2022-05-09T05:35:16.98
IV.RUFI.EHE. ML:1.3 0.00010155 0.22 AML other m 2022-05-09T05:35:17.05
IV.CSNT.HHN. ML:1.2 0.000116 0.54 AML other m 2022-05-09T05:35:17.67
IV.BOSL.HHE. ML:1.2 0.0000761 0.4 AML other m 2022-05-09T05:35:17.54
IV.BOSL.HHN. ML:1.0 0.00004865 0.44 AML other m 2022-05-09T05:35:17.55
IV.CRMI.HHE. ML:0.8 0.000039699999999999996 1.56 AML other m 2022-05-09T05:35:18.00
IV.SEI.HHE. ML:1.4 0.00007235 0.9 AML other m 2022-05-09T05:35:22.15
IV.SEI.HHN. ML:1.7 0.000149 0.66 AML other m 2022-05-09T05:35:24.16
IV.CRE.HHE. ML:1.0 0.0000236 0.28 AML other m 2022-05-09T05:35:28.55
IV.PII.HHN. ML:1.4 0.000056500000000000005 0.98 AML other m 2022-05-09T05:35:28.95
IV.CRE.HHN. ML:1.2 0.0000378 0.9 AML other m 2022-05-09T05:35:28.53
IV.PII.HHE. ML:1.3 0.0000466 0.32 AML other m 2022-05-09T05:35:29.06
IV.PARC.HHE. ML:1.0 0.000016899999999999997 0.88 AML other m 2022-05-09T05:35:32.62
IV.PARC.HHN. ML:1.2 0.0000213 0.9 AML other m 2022-05-09T05:35:34.15
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