Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 18-03-2024 and time 10:55:16 (UTC) in region 3 km W Empoli (FI)

A magnitude ML 1.6 earthquake occured in region: 3 km W Empoli (FI), on

  • 18-03-2024 10:55:16 (UTC)
  • 18-03-2024 11:55:16 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.7250, 10.9130 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
Empoli FI 3 48109 48109
Cerreto Guidi FI 5 10870 58979
Capraia e Limite FI 6 7670 66649
San Miniato PI 7 27934 94583
Vinci FI 7 14604 109187
Fucecchio FI 8 23618 132805
Montelupo Fiorentino FI 9 14098 146903
Lamporecchio PT 10 7508 154411
Santa Croce sull'Arno PI 11 14601 169012
Larciano PT 12 6394 175406
Carmignano PO 13 14450 189856
Montopoli in Val d'Arno PI 14 11148 201004
Castelfranco di Sotto PI 14 13427 214431
Castelfiorentino FI 14 17504 231935
Quarrata PT 15 26190 258125
Poggio a Caiano PO 15 10007 268132
Montespertoli FI 16 13537 281669
Signa FI 16 19179 300848
Lastra a Signa FI 16 20156 321004
Palaia PI 17 4612 325616
Santa Maria a Monte PI 18 13253 338869
Monsummano Terme PT 18 21338 360207
Ponte Buggianese PT 19 8804 369011
Montaione FI 19 3700 372711
Pieve a Nievole PT 20 9266 381977

Municipalities with at least 50000 inhabitants

An earthquake occurred to
22 Km W of Scandicci (50609 inhabitants)
23 Km SW of Prato (191150 inhabitants)
23 Km S of Pistoia (90315 inhabitants)
28 Km W of Firenze (382808 inhabitants)
36 Km E of Lucca (89046 inhabitants)
41 Km E of Pisa (89158 inhabitants)
52 Km E of Livorno (159219 inhabitants)
56 Km E of Viareggio (62467 inhabitants)
56 Km NW of Siena (53903 inhabitants)
71 Km E of Massa (69479 inhabitants)
76 Km SE of Carrara (63133 inhabitants)
83 Km W of Arezzo (99543 inhabitants)
92 Km SW of Bologna (386663 inhabitants)
95 Km SW of Imola (69797 inhabitants)
97 Km E of La Spezia (93959 inhabitants)
100 Km SW of Faenza (58541 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 1.6 2024-03-18
10:55:16		 43.7253 10.9133 11 2024-03-18
11:07:09		 Sala Sismica INGV-Roma 125962311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-03-18 10:55:16 ± 0.13
Latitude 43.7253 ± 0.0054
Longitude 10.9133 ± 0.0062
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 125962311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 599
Semi-minor axis of confidence ellipse (meter) 349
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 31
Circular confidence region, given by single value of horizontal uncertainty (meter) 600.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 44
Number of defining phases 35
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.75813
Number of stations at which the event was observed 29
Number of stations from which data was used for origin computation 22
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 50
Type of magnitude ML
Reference to an origin 125962311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-03-18 11:07:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ZEN8.EHZ. 2024-03-18T10:56:12.77 3.0 undecidable manual Sn -0.21 0
IV.ZEN8.EHZ. 2024-03-18T10:55:52.24 3.0 undecidable manual Pg 4.13 0
IV.SFI.EHZ. 2024-03-18T10:55:40.02 3.0 undecidable manual S -1.2 0
GU.EQUI.HHZ. 2024-03-18T10:55:39.70 0.6 undecidable manual S 309 77.9664 50 -0.02 44
GU.SARM.EHE. 2024-03-18T10:55:37.17 0.6 undecidable manual S 321 65.2902 50 0.83 36
IV.PARC.HHZ. 2024-03-18T10:55:35.31 3.0 positive manual P 0.2 0
IV.PSL.EHE. 2024-03-18T10:55:35.42 0.3 undecidable manual S 31.4463 8.11 0
IV.CASP.HHZ. 2024-03-18T10:55:35.91 3.0 undecidable manual P 1.16 0
IV.SEI.HHZ. 2024-03-18T10:55:33.13 0.6 undecidable manual S 44 51.0156 50 0.61 41
IV.CAFI.HHZ. 2024-03-18T10:55:33.11 3.0 undecidable manual P -0.24 0
IV.RUFI.EHZ. 2024-03-18T10:55:31.72 0.6 undecidable manual S 75 49.3173 50 -0.37 44
GU.CARD.HHZ. 2024-03-18T10:55:31.14 0.3 undecidable manual S 314 48.0186 50 -0.58 62
IV.CRE.HHZ. 2024-03-18T10:55:31.57 0.6 positive manual P 98 84.1491 50 0.77 36
IV.PSL.EHE. 2024-03-18T10:55:31.32 0.3 undecidable manual P 31.4463 8.64 0
IV.SFI.EHZ. 2024-03-18T10:55:30.11 3.0 negative manual P -0.16 0
IV.BDI.HHZ. 2024-03-18T10:55:30.62 0.6 undecidable manual S 326 45.2214 50 -0.37 44
GU.EQUI.HHZ. 2024-03-18T10:55:30.35 0.6 negative manual P 309 77.9664 50 0.5 40
IV.CSNT.HHZ. 2024-03-18T10:55:29.67 0.6 undecidable manual S 133 41.2254 50 -0.25 45
IV.BOSL.HHZ. 2024-03-18T10:55:29.88 0.3 undecidable manual S 58 43.3233 50 -0.62 61
IV.LMD.HHZ. 2024-03-18T10:55:29.76 3.0 undecidable manual P -0.01 0
IV.TRIF.CHZ. 2024-03-18T10:55:28.77 3.0 positive manual P 0.02 0
GU.SARM.EHE. 2024-03-18T10:55:28.09 0.3 undecidable manual P 321 65.2902 50 0.19 66
IV.VISG.HHZ. 2024-03-18T10:55:28.61 0.6 positive manual P 39 66.1893 50 0.58 40
MN.VLC.HHZ. 2024-03-18T10:55:28.09 0.6 undecidable manual P 319 63.9915 50 0.4 42
IV.OSSC.HHZ. 2024-03-18T10:55:27.82 0.3 undecidable manual S 130 34.8429 50 -0.4 67
IV.FROS.CHZ. 2024-03-18T10:55:27.45 0.1 positive manual P 161 60.495 50 0.3 87
IV.LOCA.HHZ. 2024-03-18T10:55:26.62 1.0 positive manual P 149 54.3012 50 0.42 21
IV.MPPT.EHZ. 2024-03-18T10:55:26.63 0.6 undecidable manual S 29 29.3484 50 -0.13 48
IV.VMGN.HHZ. 2024-03-18T10:55:26.94 1.0 negative manual P 63 55.6998 50 0.52 21
IV.PII.HHZ. 2024-03-18T10:55:26.40 0.3 undecidable manual S 269 31.1466 50 -0.83 57
GU.CARD.HHZ. 2024-03-18T10:55:25.33 0.1 negative manual P 314 48.0186 50 0.1 92
IV.RUFI.EHZ. 2024-03-18T10:55:25.69 0.3 positive manual P 75 49.3173 50 0.25 67
IV.SEI.HHZ. 2024-03-18T10:55:25.96 0.3 undecidable manual P 44 51.0156 50 0.27 67
IV.BDI.HHZ. 2024-03-18T10:55:24.91 0.1 undecidable manual P 326 45.2214 50 0.11 93
IV.CSNT.HHZ. 2024-03-18T10:55:24.08 0.6 negative manual P 133 41.2254 50 -0.11 47
IV.BOSL.HHZ. 2024-03-18T10:55:24.75 0.6 positive manual P 58 43.3233 50 0.23 45
GU.MAIM.HHZ. 2024-03-18T10:55:24.05 0.1 negative manual P 302 39.627 50 0.1 94
GU.POPM.HHZ. 2024-03-18T10:55:23.58 0.1 positive manual P 341 37.629 50 -0.05 95
IV.OSSC.HHZ. 2024-03-18T10:55:23.12 0.3 negative manual P 130 34.8429 50 -0.08 71
IV.MOCL.EHZ. 2024-03-18T10:55:23.51 0.1 positive manual P 35 37.629 50 -0.13 94
IV.PII.HHZ. 2024-03-18T10:55:22.75 1.0 undecidable manual P 269 31.1466 50 0.12 24
IV.MPPT.EHZ. 2024-03-18T10:55:22.24 0.1 positive manual P 29 29.3484 50 -0.12 95
IV.CRMI.HNZ. 2024-03-18T10:55:20.82 0.3 undecidable manual S 34 9.3795 138 -0.46 69
IV.CRMI.HNZ. 2024-03-18T10:55:19.15 0.1 undecidable manual P 34 9.3795 138 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.MAIM.HHE. ML:1.5 0.0001112 1.44 AML other m 2024-03-18T10:55:24.27
GU.MAIM.HHN. ML:1.4 0.00008735 0.42 AML other m 2024-03-18T10:55:24.79
IV.MPPT.EHN. ML:1.8 0.0003185 1.82 AML other m 2024-03-18T10:55:27.95
IV.MPPT.EHE. ML:1.9 0.000379 1.64 AML other m 2024-03-18T10:55:27.09
IV.PII.HHE. ML:2.3 0.0008594999999999999 0.46 AML other m 2024-03-18T10:55:27.81
IV.PII.HHN. ML:2.4 0.00115 0.26 AML other m 2024-03-18T10:55:27.77
IV.OSSC.HHE. ML:1.6 0.000166 1.02 AML other m 2024-03-18T10:55:28.62
IV.VISG.HHN. ML:1.2 0.0000307 0.24 AML other m 2024-03-18T10:55:30.10
IV.VISG.HHE. ML:1.2 0.00003235000000000001 0.34 AML other m 2024-03-18T10:55:30.53
IV.MOCL.EHN. ML:1.6 0.00016749999999999998 0.38 AML other m 2024-03-18T10:55:30.57
IV.BOSL.HHN. ML:1.5 0.00009355 0.8 AML other m 2024-03-18T10:55:30.57
IV.CSNT.HHE. ML:1.3 0.00007145 0.82 AML other m 2024-03-18T10:55:30.40
IV.BOSL.HHE. ML:1.5 0.00008795 0.82 AML other m 2024-03-18T10:55:30.54
GU.CARD.HHE. ML:1.7 0.00014950000000000003 0.86 AML other m 2024-03-18T10:55:32.36
IV.BDI.HHN. ML:1.6 0.00012875 0.48 AML other m 2024-03-18T10:55:32.66
GU.CARD.HHN. ML:1.8 0.000161 0.52 AML other m 2024-03-18T10:55:32.20
IV.RUFI.EHE. ML:1.3 0.000057 0.7 AML other m 2024-03-18T10:55:32.49
IV.RUFI.EHN. ML:1.6 0.00010345 0.3 AML other m 2024-03-18T10:55:32.49
IV.OSSC.HHN. ML:1.5 0.000124 0.72 AML other m 2024-03-18T10:55:33.43
IV.CSNT.HHN. ML:1.5 0.00010314999999999999 0.82 AML other m 2024-03-18T10:55:33.17
IV.LOCA.HHN. ML:1.9 0.000175 0.54 AML other m 2024-03-18T10:55:33.47
IV.MOCL.EHE. ML:1.6 0.0001625 0.24 AML other m 2024-03-18T10:55:34.03
IV.LOCA.HHE. ML:1.8 0.00014250000000000002 0.38 AML other m 2024-03-18T10:55:34.62
IV.BDI.HHE. ML:1.7 0.0001365 0.32 AML other m 2024-03-18T10:55:35.51
IV.CAFI.HHN. ML:1.3 0.000019549999999999997 0.56 AML other m 2024-03-18T10:55:35.36
IV.FROS.CHN. ML:2.1 0.00026549999999999995 0.44 AML other m 2024-03-18T10:55:35.53
IV.SEI.HHE. ML:1.9 0.0002115 1.04 AML other m 2024-03-18T10:55:35.92
IV.SEI.HHN. ML:2.1 0.0003185 0.8 AML other m 2024-03-18T10:55:36.48
IV.FROS.CHE. ML:2.0 0.000217 0.78 AML other m 2024-03-18T10:55:36.91
IV.VMGN.HHE. ML:1.5 0.00007195 0.48 AML other m 2024-03-18T10:55:37.21
IV.VMGN.HHN. ML:1.6 0.00008605 0.52 AML other m 2024-03-18T10:55:38.60
IV.TRIF.CHE. ML:1.7 0.00008745 0.88 AML other m 2024-03-18T10:55:38.12
MN.VLC.HHN. ML:1.5 0.00005739999999999999 0.98 AML other m 2024-03-18T10:55:38.16
IV.RINC.EHN. ML:1.9 0.000165 1.36 AML other m 2024-03-18T10:55:38.07
IV.TRIF.CHN. ML:1.7 0.00008265 0.66 AML other m 2024-03-18T10:55:38.53
IV.RINC.EHE. ML:2.0 0.000206 1.64 AML other m 2024-03-18T10:55:39.14
MN.VLC.HHE. ML:1.5 0.00005345 0.22 AML other m 2024-03-18T10:55:39.34
IV.LMD.HHN. ML:1.6 0.0000586 1.42 AML other m 2024-03-18T10:55:40.74
IV.SFI.EHE. ML:1.6 0.00006305 1.28 AML other m 2024-03-18T10:55:41.89
GU.EQUI.HHE. ML:1.7 0.00007644999999999999 0.52 AML other m 2024-03-18T10:55:42.77
GU.EQUI.HHN. ML:1.8 0.00008654999999999999 0.46 AML other m 2024-03-18T10:55:42.74
IV.LMD.HHE. ML:1.5 0.00004455 0.48 AML other m 2024-03-18T10:55:42.78
IV.SFI.EHN. ML:1.6 0.00006520000000000001 0.88 AML other m 2024-03-18T10:55:44.30
IV.CRE.HHE. ML:1.8 0.00007374999999999999 0.26 AML other m 2024-03-18T10:55:44.72
IV.CRE.HHN. ML:1.9 0.0000996 0.58 AML other m 2024-03-18T10:55:45.83
IV.CASP.HHE. ML:1.3 0.0000218 0.5 AML other m 2024-03-18T10:55:50.62
IV.PARC.HHE. ML:1.5 0.0000324 0.68 AML other m 2024-03-18T10:55:50.60
IV.PARC.HHN. ML:1.8 0.0000547 0.44 AML other m 2024-03-18T10:55:50.86
IV.CASP.HHN. ML:1.5 0.0000318 0.72 AML other m 2024-03-18T10:55:50.91
IV.CAFI.HHE. ML:1.3 0.00001935 0.42 AML other m 2024-03-18T10:55:50.78
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