Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 09-05-2022 and time 02:05:04 (UTC) in region 4 km SW Impruneta (FI)

A magnitude ML 1.7 earthquake occured in region: 4 km SW Impruneta (FI), on

  • 09-05-2022 02:05:04 (UTC)
  • 09-05-2022 04:05:04 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6520, 11.2390 at 9 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 4 14615 14615
San Casciano in Val di Pesa FI 4 17062 31677
Greve in Chianti FI 10 13862 45539
Tavarnelle Val di Pesa FI 11 7800 53339
Scandicci FI 13 50609 103948
Bagno a Ripoli FI 13 25611 129559
Montespertoli FI 13 13537 143096
Firenze FI 13 382808 525904
Barberino Val d'Elsa FI 13 4386 530290
Lastra a Signa FI 17 20156 550446
Figline e Incisa Valdarno FI 17 23505 573951
Fiesole FI 18 13969 587920
Signa FI 18 19179 607099
Rignano sull'Arno FI 19 8651 615750
Montelupo Fiorentino FI 20 14098 629848
Certaldo FI 20 16121 645969

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km SE of Scandicci (50609 inhabitants)
13 Km S of Firenze (382808 inhabitants)
28 Km SE of Prato (191150 inhabitants)
38 Km N of Siena (53903 inhabitants)
41 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)
87 Km SW of Imola (69797 inhabitants)
87 Km SW of Faenza (58541 inhabitants)
90 Km SW of Forlì (117913 inhabitants)
94 Km S of Bologna (386663 inhabitants)
97 Km SW of Cesena (96758 inhabitants)
98 Km E of Massa (69479 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
Bulletin
Rev1000 		ML 1.7 2022-05-09
02:05:04		 43.6523 11.2393 9 2023-01-31
19:03:32		 Bollettino Sismico Italiano INGV 108589341
Reviewed
Rev100 		ML 1.6 2022-05-09
02:05:04		 43.6525 11.2418 9 2022-05-09
02:11:31		 Sala Sismica INGV-Roma 104370231
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-05-09 02:05:04 ± 0.06
Latitude 43.6523 ± 0.0027
Longitude 11.2393 ± 0.0062
Depth (km) 9 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 108589341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 501
Semi-minor axis of confidence ellipse (meter) 196
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 95
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 37
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.52430
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.4
Num. used stations 18
Type of magnitude ML
Reference to an origin 108589341
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-08-15 22:15:33

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 15
Type of magnitude ML
Reference to an origin 104370231
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-05-09 02:11:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
CR.STON.BHZ. 2022-05-09T02:06:32.08 3.0 negative manual Pg 12.93 0
MN.TRI.HHZ. 2022-05-09T02:06:25.61 3.0 undecidable manual Sn -0.15 0
IV.RM33.HNZ. 2022-05-09T02:06:04.11 3.0 undecidable manual Sn 0.14 0
IV.PIGN.HHZ. 2022-05-09T02:05:55.31 3.0 positive manual Pn -2.72 0
IV.T0110.HHZ. 2022-05-09T02:05:47.43 3.0 positive manual Pn 2.07 0
IV.FAGN.HHZ. 2022-05-09T02:05:46.26 3.0 positive manual Pg 2.76 0
IV.CASP.HHZ. 2022-05-09T02:05:35.35 3.0 undecidable manual S -1.9 0
IV.ATMI.HHZ. 2022-05-09T02:05:35.07 3.0 undecidable manual S -2.49 0
IV.MSSA.HHZ. 2022-05-09T02:05:29.33 3.0 undecidable manual P -1.56 0
GU.POPM.HHZ. 2022-05-09T02:05:23.80 0.6 undecidable manual S 319 58.1973 50 0.37 43
IV.PII.HHZ. 2022-05-09T02:05:22.69 0.6 undecidable manual S 278 57.7977 50 -0.63 40
IV.FROS.CHZ. 2022-05-09T02:05:21.08 0.6 undecidable manual S 188 49.5171 50 -0.04 47
IV.SEI.HHN. 2022-05-09T02:05:20.46 0.6 undecidable manual S 12 45.621 50 0.4 44
IV.PARC.HHZ. 2022-05-09T02:05:20.13 3.0 undecidable manual P -2.06 0
IV.MOCL.EHE. 2022-05-09T02:05:18.71 0.6 undecidable manual S 353 39.4272 50 0.31 45
IV.MPPT.EHZ. 2022-05-09T02:05:17.45 0.6 undecidable manual S 341 35.9418 50 -0.02 49
IV.BOSL.HHZ. 2022-05-09T02:05:16.39 0.6 undecidable manual S 19 32.745 50 -0.24 47
IV.PII.HHZ. 2022-05-09T02:05:15.49 0.6 undecidable manual P 278 57.7977 50 -0.07 46
IV.RUFI.EHN. 2022-05-09T02:05:15.28 0.6 undecidable manual S 46 29.8479 107 -0.48 45
GU.POPM.HHZ. 2022-05-09T02:05:15.57 1.0 undecidable manual P 319 58.1973 50 -0.05 23
IV.CRE.HHZ. 2022-05-09T02:05:15.81 0.3 undecidable manual P 93 57.2982 50 0.33 66
IV.CRMI.HHZ. 2022-05-09T02:05:14.83 0.6 undecidable manual S 307 26.1516 109 0.29 47
IV.FROS.CHZ. 2022-05-09T02:05:14.71 0.6 undecidable manual P 188 49.5171 50 0.43 44
IV.SEI.HHN. 2022-05-09T02:05:13.79 0.1 positive manual P 12 45.621 50 0.12 94
IV.MOCL.EHE. 2022-05-09T02:05:12.43 0.1 positive manual P 353 39.4272 50 -0.29 91
IV.CSNT.HHZ. 2022-05-09T02:05:12.38 0.6 undecidable manual S 168 20.2686 114 -0.25 48
IV.BOSL.HHZ. 2022-05-09T02:05:11.62 0.1 positive manual P 19 32.745 50 -0.07 97
IV.RUFI.EHN. 2022-05-09T02:05:11.09 0.1 positive manual P 46 29.8479 107 -0.1 97
IT.FIE.HGZ. 2022-05-09T02:05:11.84 0.3 undecidable manual S 14 17.7711 117 0.02 75
IV.MPPT.EHZ. 2022-05-09T02:05:11.88 0.1 positive manual P 341 35.9418 50 -0.3 92
IV.FIR.HNZ. 2022-05-09T02:05:10.40 0.6 undecidable manual S 5 13.5753 123 -0.17 49
IV.OSSC.HHZ. 2022-05-09T02:05:10.79 0.6 undecidable manual S 178 14.2746 122 0.01 51
IV.CRMI.HHZ. 2022-05-09T02:05:10.40 0.6 undecidable manual P 307 26.1516 109 -0.08 49
IT.FIE.HGZ. 2022-05-09T02:05:09.35 0.3 undecidable manual P 14 17.7711 117 0.44 69
IV.CSNT.HHZ. 2022-05-09T02:05:09.32 0.1 negative manual P 168 20.2686 114 -0.06 99
IV.FIR.HNZ. 2022-05-09T02:05:08.26 0.1 undecidable manual P 5 13.5753 123 0.07 100
IV.OSSC.HHZ. 2022-05-09T02:05:08.46 0.1 positive manual P 178 14.2746 122 0.15 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRMI.HHN. ML:1.6 0.00023799999999999998 0.56 AML other m 2022-05-09T02:05:15.29
IV.CRMI.HHE. ML:1.2 0.00009800000000000001 0.7 AML other m 2022-05-09T02:05:16.96
IV.MPPT.EHE. ML:1.7 0.000187 0.56 AML other m 2022-05-09T02:05:17.81
IV.MPPT.EHN. ML:1.4 0.000105 0.56 AML other m 2022-05-09T02:05:17.82
IV.CRE.HHE. ML:1.5 0.00006890000000000001 0.8 AML other m 2022-05-09T02:05:24.70
GU.POPM.HHN. ML:1.6 0.00009675000000000001 1.76 AML other m 2022-05-09T02:05:27.01
GU.POPM.HHE. ML:1.5 0.00006670000000000001 0.18 AML other m 2022-05-09T02:05:27.31
IV.CRE.HHN. ML:1.6 0.00009554999999999999 0.24 AML other m 2022-05-09T02:05:27.48
IV.PII.HHN. ML:1.8 0.0001495 1 AML other m 2022-05-09T02:05:27.43
IV.PII.HHE. ML:1.9 0.00015999999999999999 0.3 AML other m 2022-05-09T02:05:28.18
IV.PARC.HHE. ML:1.4 0.0000335 0.54 AML other m 2022-05-09T02:05:34.84
IV.ATMI.HHN. ML:1.8 0.0000713 0.5 AML other m 2022-05-09T02:05:34.56
IV.PARC.HHN. ML:1.5 0.000045249999999999995 0.94 AML other m 2022-05-09T02:05:35.13
IV.ATMI.HHE. ML:1.8 0.0000711 0.54 AML other m 2022-05-09T02:05:41.40
IV.FAGN.HHN. ML:2.5 0.000059 0.3 AML other m 2022-05-09T02:05:49.58
IV.FAGN.HHE. ML:2.7 0.000094 1.32 AML other m 2022-05-09T02:05:50.31
IV.RM33.HNE. ML:3.7 0.001352 1.06 AML other m 2022-05-09T02:06:19.55
IV.RM33.HNN. ML:3.6 0.0011935 0.62 AML other m 2022-05-09T02:06:19.54
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