Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 09-05-2022 and time 02:44:39 (UTC) in region 4 km SW Impruneta (FI)

A magnitude ML 1.0 earthquake occured in region: 4 km SW Impruneta (FI), on

  • 09-05-2022 02:44:39 (UTC)
  • 09-05-2022 04:44:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.6540, 11.2380 at 10 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.

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 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 12 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 14 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 19 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)
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)
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
Reviewed
Rev100 		ML 1.0 2022-05-09
02:44:39		 43.6545 11.2377 10 2022-05-09
02:54:45		 Sala Sismica INGV-Roma 104371391
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-05-09 02:44:39 ± 0.05
Latitude 43.6545 ± 0.0027
Longitude 11.2377 ± 0.0062
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 104371391

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 549
Semi-minor axis of confidence ellipse (meter) 230
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 252
Circular confidence region, given by single value of horizontal uncertainty (meter) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.62053
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 104371391
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-05-09 02:54:45
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
SL.LJU.BHZ. 2022-05-09T02:46:11.37 3.0 undecidable manual Sn -2.66 0
CR.STON.BHZ. 2022-05-09T02:45:55.82 3.0 undecidable manual Pn 3.4 0
IV.VIVA.HHZ. 2022-05-09T02:45:46.60 3.0 undecidable manual Sg 0.55 0
GU.CANO.HHZ. 2022-05-09T02:45:46.83 3.0 undecidable manual Sn -1.1 0
MN.TRI.HHZ. 2022-05-09T02:45:27.86 3.0 positive manual Pg 3.37 0
IV.POFI.HHZ. 2022-05-09T02:45:20.75 3.0 undecidable manual Pn -2.48 0
IV.GIUL.HHZ. 2022-05-09T02:45:18.63 3.0 undecidable manual Pn -3.39 0
OX.MARN.HHZ. 2022-05-09T02:45:12.19 3.0 undecidable manual Pn -2.29 0
IV.SBPO.HNZ. 2022-05-09T02:45:08.32 3.0 negative manual P 1.59 0
IV.CAFI.HHE. 2022-05-09T02:45:01.14 0.6 undecidable manual S 121 68.8755 50 0.29 43
IV.CRTC.HHZ. 2022-05-09T02:45:01.22 3.0 undecidable manual P -1.98 0
IV.CAFI.HHE. 2022-05-09T02:44:52.06 0.6 undecidable manual P 121 68.8755 50 0.14 45
IV.RUFI.EHZ. 2022-05-09T02:44:50.20 0.3 undecidable manual S 47 29.8479 50 -0.23 71
IV.BOSL.HHZ. 2022-05-09T02:44:50.94 0.3 undecidable manual S 20 32.5452 50 -0.23 70
IV.PII.HHZ. 2022-05-09T02:44:50.75 3.0 positive manual P -1.3 0
IV.CRMI.HHZ. 2022-05-09T02:44:49.29 0.6 undecidable manual S 307 25.9518 111 -0.05 49
IV.CSNT.HHZ. 2022-05-09T02:44:47.32 0.6 undecidable manual S 168 20.5683 115 -0.29 47
IV.MOCL.EHN. 2022-05-09T02:44:47.55 0.6 undecidable manual P 353 39.1275 50 0.2 47
IV.BOSL.HHZ. 2022-05-09T02:44:46.44 0.1 undecidable manual P 20 32.5452 50 0.11 96
IV.MPPT.EHZ. 2022-05-09T02:44:46.71 0.1 undecidable manual P 341 35.6421 50 -0.09 96
IV.FIR.HNZ. 2022-05-09T02:44:45.24 0.6 undecidable manual S 6 13.3755 126 -0.22 49
IV.CRMI.HHZ. 2022-05-09T02:44:45.29 0.1 undecidable manual P 307 25.9518 111 0.01 99
IV.OSSC.HHZ. 2022-05-09T02:44:45.66 0.6 undecidable manual S 177 14.5743 124 -0.13 49
IV.RUFI.EHZ. 2022-05-09T02:44:45.93 0.1 undecidable manual P 47 29.8479 50 0.02 98
IV.CSNT.HHZ. 2022-05-09T02:44:44.16 0.1 undecidable manual P 168 20.5683 115 -0.12 98
IV.OSSC.HHZ. 2022-05-09T02:44:43.38 0.1 undecidable manual P 177 14.5743 124 0.15 98
IV.FIR.HNZ. 2022-05-09T02:44:43.12 0.1 undecidable manual P 6 13.3755 126 0.08 100
IT.FIE.HGE. 2022-05-09T02:44:43.97 0.1 undecidable manual P 15 17.5713 119 0.23 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:1.2 0.00014714641 0.12 AML other m 2022-05-09T02:44:46.60
IV.OSSC.HHN. ML:1.0 0.00009084825 0.12 AML other m 2022-05-09T02:44:46.65
IV.CSNT.HHE. ML:1.0 0.00006442394 0.2608 AML other m 2022-05-09T02:44:50.29
IV.CSNT.HHN. ML:1.0 0.00006716504500000001 0.56 AML other m 2022-05-09T02:44:51.19
IV.CRMI.HHE. ML:0.6 0.000018239585 0.4192 AML other m 2022-05-09T02:44:51.63
IV.CRMI.HHN. ML:0.9 0.000045255695 0.28 AML other m 2022-05-09T02:44:50.01
IV.CRMI.HNE. ML:1.3 0.000122055555 0.92 AML other m 2022-05-09T02:44:57.48
IV.CRMI.HNN. ML:1.4 0.0001565567 0.88 AML other m 2022-05-09T02:44:58.74
IV.RUFI.EHE. ML:1.1 0.000061776735 0.2608 AML other m 2022-05-09T02:44:50.98
IV.RUFI.EHN. ML:1.0 0.00004687848 0.2416 AML other m 2022-05-09T02:44:50.67
IV.BOSL.HHE. ML:0.9 0.000035661685 0.2208 AML other m 2022-05-09T02:44:51.36
IV.BOSL.HHN. ML:0.8 0.000025620429999999998 0.1408 AML other m 2022-05-09T02:44:52.04
IV.PII.HHE. ML:1.1 0.000025890824999999998 0.2416 AML other m 2022-05-09T02:44:59.99
IV.PII.HHN. ML:1.1 0.000029906589999999995 0.32 AML other m 2022-05-09T02:44:59.78
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