Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 09-04-2024 and time 06:58:03 (Italy) in region 4 km NE Certaldo (FI)

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

  • 09-04-2024 04:58:03 (UTC)
  • 09-04-2024 06:58:03 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5680, 11.0810 at 12 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
Certaldo FI 4 16121 16121
Tavarnelle Val di Pesa FI 8 7800 23921
Barberino Val d'Elsa FI 8 4386 28307
Montespertoli FI 8 13537 41844
Castelfiorentino FI 10 17504 59348
Gambassi Terme FI 11 4870 64218
San Gimignano SI 12 7820 72038
Poggibonsi SI 12 29196 101234
San Casciano in Val di Pesa FI 13 17062 118296
Montaione FI 14 3700 121996
Colle di Val d'Elsa SI 17 21620 143616
Montelupo Fiorentino FI 19 14098 157714
Impruneta FI 19 14615 172329
Greve in Chianti FI 19 13862 186191
Castellina in Chianti SI 20 2859 189050
Empoli FI 20 48109 237159

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SW of Scandicci (50609 inhabitants)
27 Km SW of Firenze (382808 inhabitants)
34 Km NW of Siena (53903 inhabitants)
35 Km S of Prato (191150 inhabitants)
43 Km SE of Pistoia (90315 inhabitants)
56 Km SE of Lucca (89046 inhabitants)
57 Km E of Pisa (89158 inhabitants)
62 Km E of Livorno (159219 inhabitants)
66 Km W of Arezzo (99543 inhabitants)
75 Km E of Viareggio (62467 inhabitants)
90 Km N of Grosseto (82087 inhabitants)
92 Km SE of Massa (69479 inhabitants)
97 Km SE of Carrara (63133 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 1.7 2024-04-09
04:58:03		 43.5685 11.0812 13 2024-04-09
05:06:29		 Sala Sismica INGV-Roma 126585241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-04-09 04:58:03 ± 0.06
Latitude 43.5685 ± 0.0027
Longitude 11.0812 ± 0.0062
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 126585241

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 402
Semi-minor axis of confidence ellipse (meter) 365
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 248
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) 102
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.54769
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 28
Type of magnitude ML
Reference to an origin 126585241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-04-09 05:06:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LPEL.HHZ. 2024-04-09T04:59:32.88 3.0 undecidable manual Sg 11.03 0
IV.GUAR.HHZ. 2024-04-09T04:59:11.83 3.0 undecidable manual Sn -2.01 0
CH.MUGIO.HHZ. 2024-04-09T04:58:52.61 3.0 undecidable manual Pg 5.24 0
IV.MMO1.EHZ. 2024-04-09T04:58:33.50 3.0 undecidable manual Pn -0.66 0
GU.EQUI.HHZ. 2024-04-09T04:58:32.77 3.0 undecidable manual S -1.87 0
IV.SEI.HHZ. 2024-04-09T04:58:23.05 3.0 undecidable manual S -0.06 0
IV.MOCL.EHZ. 2024-04-09T04:58:19.15 0.6 undecidable manual S 9 49.1175 92 0.09 47
IV.TRIF.CHZ. 2024-04-09T04:58:19.85 0.3 undecidable manual S 196 52.3032 92 -0.09 70
MN.VLC.HHZ. 2024-04-09T04:58:18.71 3.0 positive manual P 0.02 0
IV.ARCI.HHZ. 2024-04-09T04:58:18.72 3.0 negative manual P -0.32 0
IV.CRE.HHZ. 2024-04-09T04:58:17.23 3.0 negative manual P 0.52 0
IV.CAFI.HHZ. 2024-04-09T04:58:17.48 3.0 positive manual P -0.2 0
IV.LMD.HHZ. 2024-04-09T04:58:17.20 3.0 undecidable manual P -0.25 0
IV.MPPT.EHZ. 2024-04-09T04:58:17.40 0.3 undecidable manual S 1 43.1235 93 -0.09 70
GU.GSCL.HHZ. 2024-04-09T04:58:17.32 3.0 positive manual P -3.01 0
IV.SFI.EHZ. 2024-04-09T04:58:16.85 3.0 negative manual P -0.07 0
IV.FROS.CHZ. 2024-04-09T04:58:16.30 0.3 undecidable manual S 171 40.2264 93 -0.41 66
IV.BDI.HHZ. 2024-04-09T04:58:15.66 3.0 negative manual P 0.07 0
GU.POPM.HHZ. 2024-04-09T04:58:14.25 3.0 negative manual P 0 0
IV.LOCA.HHZ. 2024-04-09T04:58:14.38 0.6 undecidable manual S 153 32.5452 94 -0.27 46
IV.SEI.HHZ. 2024-04-09T04:58:14.49 3.0 positive manual P 0.03 0
IV.VMGN.HHZ. 2024-04-09T04:58:14.60 3.0 positive manual P 0.41 0
GU.MAIM.HHZ. 2024-04-09T04:58:14.36 0.1 negative manual P 309 60.7947 92 0.07 91
IV.TRIF.CHZ. 2024-04-09T04:58:13.24 0.1 undecidable manual P 196 52.3032 92 0.25 89
IV.MOCL.EHZ. 2024-04-09T04:58:13.16 3.0 undecidable manual P 9 49.1175 92 0.68 0
IV.CRMI.HHZ. 2024-04-09T04:58:12.37 3.0 undecidable manual S 342 26.4513 96 -0.68 0
IV.PII.HHZ. 2024-04-09T04:58:12.25 0.1 negative manual P 291 47.8188 92 -0.04 94
IV.RUFI.EHZ. 2024-04-09T04:58:12.22 3.0 undecidable manual P -0.26 0
IV.FROS.CHZ. 2024-04-09T04:58:11.31 0.1 undecidable manual P 171 40.2264 93 0.18 92
IV.MPPT.EHZ. 2024-04-09T04:58:11.72 0.6 negative manual P 1 43.1235 93 0.14 46
IV.CSNT.HHZ. 2024-04-09T04:58:11.19 0.6 undecidable manual S 122 19.869 101 -0.11 48
IV.OSSC.HHZ. 2024-04-09T04:58:10.04 0.6 undecidable manual S 111 14.1747 114 0.21 48
IV.LOCA.HHZ. 2024-04-09T04:58:10.17 0.6 undecidable manual P 153 32.5452 94 0.23 46
IV.CSNT.HHZ. 2024-04-09T04:58:08.00 0.3 positive manual P 122 19.869 101 0 74
IV.CRMI.HHZ. 2024-04-09T04:58:08.78 0.1 undecidable manual P 342 26.4513 96 -0.23 94
IV.OSSC.HHZ. 2024-04-09T04:58:07.19 0.1 negative manual P 111 14.1747 114 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHN. ML:1.9 0.0006995 1.08 AML other m 2024-04-09T04:58:10.16
IV.OSSC.HHE. ML:1.8 0.0006475 0.14 AML other m 2024-04-09T04:58:10.55
IV.CSNT.HHE. ML:1.5 0.000217 0.22 AML other m 2024-04-09T04:58:11.51
IV.CRMI.HHN. ML:1.8 0.00033150000000000003 0.52 AML other m 2024-04-09T04:58:12.88
IV.CRMI.HHE. ML:1.5 0.000174 0.3 AML other m 2024-04-09T04:58:12.68
IV.CSNT.HHN. ML:1.6 0.000265 0.48 AML other m 2024-04-09T04:58:12.78
IV.LOCA.HHN. ML:1.8 0.000254 0.32 AML other m 2024-04-09T04:58:15.29
IV.LOCA.HHE. ML:1.7 0.00020800000000000001 0.24 AML other m 2024-04-09T04:58:15.46
IV.MPPT.EHE. ML:1.8 0.000191 0.14 AML other m 2024-04-09T04:58:17.78
IV.MPPT.EHN. ML:1.9 0.00026349999999999995 0.14 AML other m 2024-04-09T04:58:17.88
IV.PII.HHN. ML:1.8 0.000182 0.26 AML other m 2024-04-09T04:58:19.16
IV.PII.HHE. ML:1.8 0.00016949999999999997 1.1 AML other m 2024-04-09T04:58:19.19
IV.MOCL.EHE. ML:1.7 0.0001295 1.54 AML other m 2024-04-09T04:58:20.11
IV.MOCL.EHN. ML:1.6 0.00010105 0.76 AML other m 2024-04-09T04:58:20.83
IV.TRIF.CHE. ML:1.6 0.00009535 0.12 AML other m 2024-04-09T04:58:21.66
IV.TRIF.CHN. ML:1.8 0.000136 0.74 AML other m 2024-04-09T04:58:21.28
GU.MAIM.HHN. ML:1.4 0.0000491 0.72 AML other m 2024-04-09T04:58:23.87
GU.MAIM.HHE. ML:1.4 0.0000553 0.46 AML other m 2024-04-09T04:58:23.73
IV.SEI.HHE. ML:1.6 0.0000927 1.5 AML other m 2024-04-09T04:58:23.17
GU.POPM.HHE. ML:1.7 0.000103 1.08 AML other m 2024-04-09T04:58:24.97
GU.POPM.HHN. ML:1.8 0.00014150000000000002 0.24 AML other m 2024-04-09T04:58:24.85
IV.SEI.HHN. ML:1.9 0.00017299999999999998 1.4 AML other m 2024-04-09T04:58:24.78
IV.LMD.HHE. ML:1.3 0.00003204999999999999 1.18 AML other m 2024-04-09T04:58:27.63
IV.BDI.HHN. ML:1.7 0.00009065 1 AML other m 2024-04-09T04:58:27.59
IV.CRE.HHN. ML:1.5 0.000055599999999999996 0.92 AML other m 2024-04-09T04:58:27.61
IV.LMD.HHN. ML:1.4 0.000034149999999999997 1.28 AML other m 2024-04-09T04:58:28.67
IV.CRE.HHE. ML:1.4 0.00004555 0.6 AML other m 2024-04-09T04:58:29.36
IV.BDI.HHE. ML:1.5 0.00006154999999999999 0.56 AML other m 2024-04-09T04:58:29.44
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