Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 09-04-2024 and time 07:43:37 (Italy) in region 3 km NE Certaldo (FI)

A magnitude ML 1.8 earthquake occured in region: 3 km NE Certaldo (FI), on

  • 09-04-2024 05:43:37 (UTC)
  • 09-04-2024 07:43:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.5680, 11.0700 at 11 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 3 16121 16121
Tavarnelle Val di Pesa FI 8 7800 23921
Montespertoli FI 9 13537 37458
Barberino Val d'Elsa FI 9 4386 41844
Castelfiorentino FI 9 17504 59348
Gambassi Terme FI 10 4870 64218
San Gimignano SI 11 7820 72038
Montaione FI 13 3700 75738
Poggibonsi SI 13 29196 104934
San Casciano in Val di Pesa FI 14 17062 121996
Colle di Val d'Elsa SI 17 21620 143616
Montelupo Fiorentino FI 19 14098 157714
Empoli FI 20 48109 205823
Impruneta FI 20 14615 220438

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km SW of Scandicci (50609 inhabitants)
27 Km SW of Firenze (382808 inhabitants)
35 Km NW of Siena (53903 inhabitants)
35 Km S of Prato (191150 inhabitants)
43 Km S of Pistoia (90315 inhabitants)
55 Km SE of Lucca (89046 inhabitants)
56 Km E of Pisa (89158 inhabitants)
61 Km E of Livorno (159219 inhabitants)
67 Km W of Arezzo (99543 inhabitants)
74 Km E of Viareggio (62467 inhabitants)
90 Km N of Grosseto (82087 inhabitants)
91 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 1.8 2024-04-09
05:43:37		 43.5677 11.07 11 2024-04-09
05:52:49		 Sala Sismica INGV-Roma 126586041
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-04-09 05:43:37 ± 0.07
Latitude 43.5677 ± 0.0045
Longitude 11.0700 ± 0.0062
Depth (km) 11 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 126586041

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 530
Semi-minor axis of confidence ellipse (meter) 224
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 44
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 97
Number of associated phases, regardless of their use for origin computation 38
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.65471
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 15
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 35
Type of magnitude ML
Reference to an origin 126586041
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-04-09 05:52:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PTCC.HHZ. 2024-04-09T05:45:21.52 3.0 undecidable manual Sg 10.66 0
IT.VNF1.HNZ. 2024-04-09T05:45:09.03 3.0 undecidable manual Sg 2.05 0
GE.MATE.HHZ. 2024-04-09T05:45:00.84 3.0 positive manual Pn 4.47 0
IV.VVLD.HHZ. 2024-04-09T05:44:57.13 3.0 undecidable manual Sg 2.36 0
IV.LPEL.HHZ. 2024-04-09T05:44:55.31 3.0 undecidable manual Sn -4.71 0
IV.MCRV.HHZ. 2024-04-09T05:44:48.13 3.0 undecidable manual Pg 5.23 0
IV.GUMA.HHZ. 2024-04-09T05:44:36.14 3.0 undecidable manual Sg 1.2 0
IV.SRES.HHZ. 2024-04-09T05:44:33.45 3.0 undecidable manual Sg -0.92 0
SI.BOSI.HHZ. 2024-04-09T05:44:24.15 3.0 positive manual Pn -0.95 0
IV.OFFI.HHZ. 2024-04-09T05:44:14.10 3.0 negative manual Pn 0.29 0
IV.ZEN8.EHZ. 2024-04-09T05:44:11.66 3.0 undecidable manual Pn -1.69 0
IV.SFI.EHZ. 2024-04-09T05:43:59.91 0.6 undecidable manual S 59 72.6717 90 0.11 45
GU.MAIM.HHZ. 2024-04-09T05:43:55.67 0.6 undecidable manual S 310 60.1953 90 -0.8 36
IV.TRIF.CHZ. 2024-04-09T05:43:54.27 0.6 undecidable manual S 195 52.0035 90 -0.03 47
IV.MOCL.EHZ. 2024-04-09T05:43:53.64 0.6 undecidable manual S 10 49.3173 90 0.06 48
IV.RUFI.EHZ. 2024-04-09T05:43:52.51 0.6 undecidable manual S 49 46.3203 91 -0.26 45
IV.PII.HHZ. 2024-04-09T05:43:52.27 0.6 undecidable manual S 292 47.0196 90 -0.69 39
IV.SFI.EHZ. 2024-04-09T05:43:51.10 0.6 undecidable manual P 59 72.6717 90 0.53 42
IV.MPPT.EHZ. 2024-04-09T05:43:51.83 0.6 undecidable manual S 2 43.3233 91 -0.14 47
IV.FROS.CHZ. 2024-04-09T05:43:50.89 0.6 undecidable manual S 170 40.3263 91 -0.28 46
GU.CARD.HHZ. 2024-04-09T05:43:50.29 0.3 undecidable manual P 317 69.2751 90 0.23 67
IV.BDI.HHZ. 2024-04-09T05:43:50.04 0.6 negative manual P 326 66.7776 90 0.37 44
IV.SEI.HHZ. 2024-04-09T05:43:48.88 0.6 negative manual P 23 58.6968 90 0.46 43
IV.LOCA.HHZ. 2024-04-09T05:43:48.81 0.6 undecidable manual S 152 32.8449 91 -0.37 45
GU.MAIM.HHZ. 2024-04-09T05:43:48.79 0.1 negative manual P 310 60.1953 90 0.14 92
IV.MOCL.EHZ. 2024-04-09T05:43:47.26 1.0 negative manual P 10 49.3173 90 0.29 23
IV.TRIF.CHZ. 2024-04-09T05:43:47.70 0.1 undecidable manual P 195 52.0035 90 0.31 90
IV.PII.HHZ. 2024-04-09T05:43:46.68 0.1 negative manual P 292 47.0196 90 0.06 96
IV.RUFI.EHZ. 2024-04-09T05:43:46.73 0.6 undecidable manual P 49 46.3203 91 0.22 47
IV.CRMI.HHZ. 2024-04-09T05:43:46.77 0.6 undecidable manual S 344 26.3514 91 -0.67 41
IV.MPPT.EHZ. 2024-04-09T05:43:46.14 0.3 negative manual P 2 43.3233 91 0.09 72
IV.CSNT.HHZ. 2024-04-09T05:43:45.55 0.6 undecidable manual S 121 20.5683 92 -0.35 46
IV.FROS.CHZ. 2024-04-09T05:43:45.78 0.3 undecidable manual P 170 40.3263 91 0.19 71
IV.OSSC.HHZ. 2024-04-09T05:43:44.07 0.6 undecidable manual S 109 14.9739 98 -0.34 47
IV.LOCA.HHZ. 2024-04-09T05:43:44.66 0.6 positive manual P 152 32.8449 91 0.22 48
IV.CRMI.HHZ. 2024-04-09T05:43:43.19 1.0 undecidable manual P 344 26.3514 91 -0.24 23
IV.CSNT.HHZ. 2024-04-09T05:43:42.47 0.3 undecidable manual P 121 20.5683 92 -0.08 74
IV.OSSC.HHZ. 2024-04-09T05:43:41.64 0.1 negative manual P 109 14.9739 98 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHN. ML:2.0 0.0009080000000000001 0.92 AML other m 2024-04-09T05:43:44.63
IV.OSSC.HHE. ML:1.9 0.000771 1.84 AML other m 2024-04-09T05:43:45.02
IV.CSNT.HHN. ML:1.7 0.0003435 1.44 AML other m 2024-04-09T05:43:46.05
IV.CRMI.HHN. ML:2.0 0.000517 0.54 AML other m 2024-04-09T05:43:47.31
IV.CRMI.HHE. ML:1.7 0.000265 0.98 AML other m 2024-04-09T05:43:47.12
IV.CSNT.HHE. ML:1.6 0.00027800000000000004 0.34 AML other m 2024-04-09T05:43:47.55
IV.LOCA.HNE. ML:1.8 0.000279 1.36 AML other m 2024-04-09T05:43:49.93
IV.LOCA.HHN. ML:1.8 0.00030400000000000007 0.32 AML other m 2024-04-09T05:43:49.75
IV.LOCA.HNN. ML:1.9 0.00033350000000000003 0.32 AML other m 2024-04-09T05:43:49.75
IV.LOCA.HHE. ML:1.8 0.0002565 0.26 AML other m 2024-04-09T05:43:49.93
IV.FROS.CHE. ML:2.0 0.00030649999999999997 0.26 AML other m 2024-04-09T05:43:51.41
IV.FROS.CHN. ML:2.0 0.000309 0.18 AML other m 2024-04-09T05:43:52.18
IV.MPPT.EHE. ML:1.9 0.000264 0.16 AML other m 2024-04-09T05:43:52.21
IV.MPPT.EHN. ML:2.1 0.000372 0.12 AML other m 2024-04-09T05:43:52.31
IV.RUFI.EHN. ML:1.4 0.00007635 0.64 AML other m 2024-04-09T05:43:52.64
IV.PII.HHN. ML:2.0 0.000264 0.26 AML other m 2024-04-09T05:43:53.72
IV.RUFI.EHE. ML:1.3 0.000060450000000000006 0.5 AML other m 2024-04-09T05:43:53.73
IV.MOCL.EHE. ML:1.8 0.000185 0.44 AML other m 2024-04-09T05:43:54.55
IV.PII.HHE. ML:2.0 0.0002705 0.36 AML other m 2024-04-09T05:43:54.79
IV.MOCL.EHN. ML:1.8 0.000149 1.26 AML other m 2024-04-09T05:43:55.26
IV.TRIF.CHE. ML:1.7 0.00011480000000000001 1.26 AML other m 2024-04-09T05:43:55.11
IV.TRIF.CHN. ML:1.8 0.0001455 1.26 AML other m 2024-04-09T05:43:56.10
GU.MAIM.HHN. ML:1.5 0.0000725 0.3 AML other m 2024-04-09T05:43:57.44
IV.SEI.HHE. ML:1.8 0.000127 0.8 AML other m 2024-04-09T05:43:58.31
IV.SEI.HHN. ML:2.0 0.000227 0.6 AML other m 2024-04-09T05:43:59.22
GU.MAIM.HHE. ML:1.6 0.0000764 0.48 AML other m 2024-04-09T05:43:59.40
IV.BDI.HHE. ML:1.7 0.00009379999999999999 1.14 AML other m 2024-04-09T05:44:00.29
GU.CARD.HHN. ML:1.9 0.0001315 0.22 AML other m 2024-04-09T05:44:01.32
IV.BDI.HHN. ML:1.9 0.00014050000000000003 0.92 AML other m 2024-04-09T05:44:01.97
GU.CARD.HHE. ML:1.9 0.00012265 0.48 AML other m 2024-04-09T05:44:01.90
IV.CRE.HHN. ML:1.7 0.00007489999999999999 0.26 AML other m 2024-04-09T05:44:02.08
IV.CAFI.HHN. ML:1.2 0.000027049999999999997 0.38 AML other m 2024-04-09T05:44:02.72
IV.CRE.HHE. ML:1.6 0.0000592 0.58 AML other m 2024-04-09T05:44:03.80
IV.CAFI.HHE. ML:1.2 0.000027300000000000003 0.96 AML other m 2024-04-09T05:44:04.56
IV.VVLD.HHN. ML:2.7 0.00008125 0.1 AML other m 2024-04-09T05:45:20.54
IV.VVLD.HHE. ML:2.6 0.00006220000000000001 0.14 AML other m 2024-04-09T05:45:20.50
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