Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 16-04-2024 and time 18:01:47 (UTC) in region 4 km E Poggibonsi (SI)

A magnitude ML 0.8 earthquake occured in region: 4 km E Poggibonsi (SI), on

  • 16-04-2024 18:01:47 (UTC)
  • 16-04-2024 20:01:47 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.4640, 11.1970 at 6 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
Poggibonsi SI 4 29196 29196
Castellina in Chianti SI 7 2859 32055
Colle di Val d'Elsa SI 8 21620 53675
Monteriggioni SI 8 9810 63485
Barberino Val d'Elsa FI 9 4386 67871
Tavarnelle Val di Pesa FI 11 7800 75671
San Gimignano SI 12 7820 83491
Radda in Chianti SI 15 1613 85104
Certaldo FI 16 16121 101225
Greve in Chianti FI 17 13862 115087
Casole d'Elsa SI 18 3897 118984
Gaiole in Chianti SI 19 2758 121742
Siena SI 20 53903 175645

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NW of Siena (53903 inhabitants)
33 Km S of Scandicci (50609 inhabitants)
34 Km S of Firenze (382808 inhabitants)
47 Km S of Prato (191150 inhabitants)
55 Km W of Arezzo (99543 inhabitants)
57 Km SE of Pistoia (90315 inhabitants)
70 Km E of Pisa (89158 inhabitants)
70 Km SE of Lucca (89046 inhabitants)
72 Km E of Livorno (159219 inhabitants)
79 Km N of Grosseto (82087 inhabitants)
88 Km SE of Viareggio (62467 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 0.8 2024-04-16
18:01:47		 43.4645 11.1967 6 2024-04-16
18:20:41		 Sala Sismica INGV-Roma 126808131
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-04-16 18:01:47 ± 0.08
Latitude 43.4645 ± 0.0018
Longitude 11.1967 ± 0.0074
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 126808131

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 520
Semi-minor axis of confidence ellipse (meter) 315
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 80
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 228
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.04
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.16458
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 3
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 126808131
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-04-16 18:20:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.HPAC.HHZ. 2024-04-16T18:03:30.24 3.0 undecidable manual Pg 17.559999 0
IV.MRLC.HHZ. 2024-04-16T18:03:22.67 3.0 undecidable manual Sg 16.41 0
IV.LINA.HHZ. 2024-04-16T18:03:15.98 3.0 negative manual Pn -4.24 0
IV.PIPA.HHZ. 2024-04-16T18:02:56.39 3.0 undecidable manual Pg 9.09 0
IV.MAGA.HHZ. 2024-04-16T18:02:51.31 3.0 undecidable manual Sn 0.31 0
IV.BOB.HHZ. 2024-04-16T18:02:48.17 3.0 undecidable manual Sn 1.44 0
ST.CARE.EHZ. 2024-04-16T18:02:40.52 3.0 undecidable manual Pg 16.370001 0
IV.LRP.EHZ. 2024-04-16T18:02:33.84 3.0 undecidable manual Sg 5.39 0
IV.RNI2.HHZ. 2024-04-16T18:02:32.25 3.0 undecidable manual Sn -0.52 0
IV.PLMA.HHZ. 2024-04-16T18:02:07.85 3.0 undecidable manual Pn 1.91 0
IV.CERT.HHZ. 2024-04-16T18:01:58.55 3.0 negative manual Pg 0.96 0
IV.LOCA.HHZ. 2024-04-16T18:01:53.97 0.3 undecidable manual S 163 18.2706 108 0.02 73
IV.LOCA.HHZ. 2024-04-16T18:01:51.08 0.3 undecidable manual P 163 18.2706 108 -0.05 73
IV.OSSC.HHZ. 2024-04-16T18:01:50.61 0.6 undecidable manual S 31 7.6812 127 -0.01 50
IV.CSNT.HHZ. 2024-04-16T18:01:50.54 1.0 undecidable manual S 83 7.5813 128 -0.06 25
IV.CSNT.HHZ. 2024-04-16T18:01:49.22 0.1 undecidable manual P 83 7.5813 128 0.02 100
IV.OSSC.HHZ. 2024-04-16T18:01:49.21 0.1 positive manual P 31 7.6812 127 0.01 100
IV.ARRO.EHZ. 2024-04-16T18:01:47.46 3.0 undecidable manual P 0.08 0
IV.FOSV.EHZ. 2024-04-16T18:01:37.44 3.0 undecidable manual P 0.16 0
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.OSSC.HHE. ML:0.0 0.000085824945 0.18 AML other m 2024-04-16T18:01:50.63
IV.OSSC.HHN. ML:0.0 0.000070048125 0.16 AML other m 2024-04-16T18:01:50.72
IV.CSNT.HHE. ML:0.0 0.000053225504999999994 0.12 AML other m 2024-04-16T18:01:50.89
IV.CSNT.HHN. ML:0.0 0.00011317697 0.26 AML other m 2024-04-16T18:01:50.70
IV.LOCA.HHE. ML:0.9 0.00007077732 1.28 AML other m 2024-04-16T18:01:54.29
IV.LOCA.HHN. ML:0.7 0.000044723955 1.22 AML other m 2024-04-16T18:01:53.82
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