Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 29-03-2024 and time 09:22:57 (Italy) in region 1 km NW Certaldo (FI)

A magnitude ML 1.1 earthquake occured in region: 1 km NW Certaldo (FI), on

  • 29-03-2024 08:22:57 (UTC)
  • 29-03-2024 09:22:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.5610, 11.0340 at 9 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 2 16121 16121
Gambassi Terme FI 7 4870 20991
Castelfiorentino FI 7 17504 38495
Montaione FI 10 3700 42195
Montespertoli FI 10 13537 55732
San Gimignano SI 10 7820 63552
Tavarnelle Val di Pesa FI 11 7800 71352
Barberino Val d'Elsa FI 11 4386 75738
Poggibonsi SI 14 29196 104934
San Casciano in Val di Pesa FI 16 17062 121996
Colle di Val d'Elsa SI 17 21620 143616
Montelupo Fiorentino FI 19 14098 157714
Empoli FI 19 48109 205823
San Miniato PI 20 27934 233757

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km SW of Scandicci (50609 inhabitants)
29 Km SW of Firenze (382808 inhabitants)
36 Km NW of Siena (53903 inhabitants)
36 Km S of Prato (191150 inhabitants)
43 Km S of Pistoia (90315 inhabitants)
53 Km SE of Lucca (89046 inhabitants)
54 Km E of Pisa (89158 inhabitants)
58 Km E of Livorno (159219 inhabitants)
69 Km W of Arezzo (99543 inhabitants)
72 Km E of Viareggio (62467 inhabitants)
89 Km SE of Massa (69479 inhabitants)
89 Km N of Grosseto (82087 inhabitants)
95 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 1.1 2024-03-29
08:22:57		 43.5607 11.0335 9 2024-03-29
08:34:39		 Sala Sismica INGV-Roma 126276151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-03-29 08:22:57 ± 0.14
Latitude 43.5607 ± 0.0072
Longitude 11.0335 ± 0.0137
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 126276151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1211
Semi-minor axis of confidence ellipse (meter) 474
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 58
Circular confidence region, given by single value of horizontal uncertainty (meter) 1210.0
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 22
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.52610
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 126276151
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-03-29 08:34:39
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.CIRO.HHZ. 2024-03-29T08:24:25.40 3.0 undecidable manual Sn 2.26 0
IV.PTQR.HHZ. 2024-03-29T08:23:52.18 3.0 undecidable manual Sn -0.31 0
GU.RSP.HHZ. 2024-03-29T08:23:43.25 3.0 undecidable manual Pn 0 0
IV.MMO1.EHZ. 2024-03-29T08:23:32.56 3.0 undecidable manual Sn -4.14 0
IV.PTQR.HHZ. 2024-03-29T08:23:20.68 3.0 undecidable manual Pn -5.6 0
IV.ARRO.EHZ. 2024-03-29T08:23:17.36 3.0 undecidable manual Pg 1.04 0
GU.MAIM.HHZ. 2024-03-29T08:23:15.72 0.6 undecidable manual S 312 58.3971 50 -0.15 49
IV.TRIF.CHZ. 2024-03-29T08:23:14.20 0.6 undecidable manual S 192 50.616 50 0.43 46
IV.PII.HHZ. 2024-03-29T08:23:12.04 0.6 undecidable manual S 294 44.622 50 -0.13 50
IV.LOCA.HHZ. 2024-03-29T08:23:08.69 0.6 undecidable manual S 147 33.6441 50 -0.57 46
GU.MAIM.HHZ. 2024-03-29T08:23:08.49 0.6 positive manual P 312 58.3971 50 0.47 45
IV.TRIF.CHZ. 2024-03-29T08:23:06.34 0.1 undecidable manual P 192 50.616 50 -0.47 92
IV.PII.HHZ. 2024-03-29T08:23:06.25 0.3 negative manual P 294 44.622 50 0.36 71
IV.CRMI.HHZ. 2024-03-29T08:23:06.49 0.6 undecidable manual S 351 26.4513 108 -0.48 48
IV.BOSL.HHZ. 2024-03-29T08:23:06.71 0.1 undecidable manual P 33 49.3173 50 0.09 100
IV.CSNT.HHZ. 2024-03-29T08:23:05.71 0.6 undecidable manual S 115 22.8549 111 -0.07 53
IV.OSSC.HHZ. 2024-03-29T08:23:04.27 0.6 undecidable manual S 103 17.5713 117 0.16 52
IV.LOCA.HHZ. 2024-03-29T08:23:04.54 0.6 positive manual P 147 33.6441 50 0.33 49
IV.IMOL.EHZ. 2024-03-29T08:23:04.81 3.0 negative manual P -0.67 0
IV.CSNT.HHZ. 2024-03-29T08:23:02.17 1.0 undecidable manual P 115 22.8549 111 -0.03 27
IV.CRMI.HHZ. 2024-03-29T08:23:02.87 0.6 positive manual P 351 26.4513 108 -0.01 53
IV.OSSC.HHZ. 2024-03-29T08:23:01.45 0.6 positive manual P 103 17.5713 117 0.22 52
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:1.3 0.00018449999999999999 0.8 AML other m 2024-03-29T08:23:04.28
IV.OSSC.HHN. ML:1.2 0.00014350000000000002 1.04 AML other m 2024-03-29T08:23:04.91
IV.CSNT.HHE. ML:0.9 0.00004769893 0.4 AML other m 2024-03-29T08:23:08.60
IV.CSNT.HHN. ML:0.8 0.00004573867500000001 0.24 AML other m 2024-03-29T08:23:08.14
IV.CRMI.HHE. ML:0.8 0.00003473463 0.22 AML other m 2024-03-29T08:23:06.72
IV.CRMI.HHN. ML:1.1 0.00006763712499999999 0.3 AML other m 2024-03-29T08:23:06.94
IV.LOCA.HHE. ML:1.1 0.00004991136 0.32 AML other m 2024-03-29T08:23:09.45
IV.LOCA.HHN. ML:1.2 0.000062018585 1.46 AML other m 2024-03-29T08:23:08.90
IV.PII.HHE. ML:1.4 0.00007962285 2.52 AML other m 2024-03-29T08:23:22.03
IV.PII.HHN. ML:1.1 0.00004117887 0.82 AML other m 2024-03-29T08:23:15.40
IV.TRIF.CHE. ML:1.1 0.000036325155 0.632 AML other m 2024-03-29T08:23:31.03
IV.TRIF.CHN. ML:1.1 0.000035481575 0.272 AML other m 2024-03-29T08:23:14.34
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