Earthquake with magnitude of ML 0.6 on date 21-04-2024 and time 21:12:48 (Italy) in region 1 km SE Chiusdino (SI)

A magnitude ML 0.6 earthquake occured in region: 1 km SE Chiusdino (SI), on

  • 21-04-2024 19:12:48 (UTC)
  • 21-04-2024 21:12:48 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1480, 11.0980 at 7 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Chiusdino SI 1 1903 1903
Monticiano SI 7 1571 3474
Montieri GR 7 1204 4678
Radicondoli SI 13 914 5592
Roccastrada GR 16 9199 14791
Castelnuovo di Val di Cecina PI 17 2231 17022
Sovicille SI 18 10116 27138
Monterotondo Marittimo GR 20 1371 28509

Municipalities with at least 50000 inhabitants

An earthquake occurred to
27 Km SW of Siena (53903 inhabitants)
43 Km N of Grosseto (82087 inhabitants)
68 Km S of Scandicci (50609 inhabitants)
70 Km S of Firenze (382808 inhabitants)
73 Km W of Arezzo (99543 inhabitants)
78 Km SE of Livorno (159219 inhabitants)
82 Km S of Prato (191150 inhabitants)
85 Km SE of Pisa (89158 inhabitants)
89 Km S of Pistoia (90315 inhabitants)
91 Km SE of Lucca (89046 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
Md 0.9
ML 0.6
2024-04-21
19:12:48
43.1483 11.0985 7 2024-04-21
19:17:08
Sala Sismica INGV-Roma 126946151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2024-04-21 19:12:48 ± 0.28
Latitude 43.1483 ± 0.0090
Longitude 11.0985 ± 0.0136
Depth (km) 7 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 126946151

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1261
Semi-minor axis of confidence ellipse (meter) 466
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 126
Circular confidence region, given by single value of horizontal uncertainty (meter) 1260.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 154
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.07464
Epicentral distance of station farthest from the epicenter (degree) 0.20325
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.3
Num. used stations 4
Type of magnitude ML
Reference to an origin 126946151
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-04-21 19:17:08

Md:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 3
Type of magnitude Md
Reference to an origin 126946151
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2024-04-21 19:17:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RIBO.EHZ.01 2024-04-21T19:12:55.93 0.6 undecidable manual S 191 22.5552 108 -0.32 48
IV.LOCA.HHZ. 2024-04-21T19:12:55.62 0.6 undecidable manual S 37 21.9669 108 -0.46 46
IV.TRIF.CHZ. 2024-04-21T19:12:53.93 0.6 undecidable manual S 257 16.2726 114 -0.3 48
IV.LOCA.HHZ. 2024-04-21T19:12:52.59 0.1 undecidable manual P 37 21.9669 108 -0.09 100
IV.RIBO.EHZ.01 2024-04-21T19:12:52.93 0.1 undecidable manual P 191 22.5552 108 0.14 99
IV.TRIF.CHZ. 2024-04-21T19:12:51.81 0.3 negative manual P 257 16.2726 114 0.19 74
IV.FROS.CHZ. 2024-04-21T19:12:51.91 0.3 undecidable manual S 34 8.2806 131 0.05 77
IV.FROS.CHZ. 2024-04-21T19:12:50.51 0.1 positive manual P 34 8.2806 131 0.26 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHN. ML:0.4 0.000046877739 0.112 AML other m 2024-04-21T19:12:52.07
IV.FROS.CHE. ML:0.4 0.000047001470000000005 0.12 AML other m 2024-04-21T19:12:51.96
IV.TRIF.CHN. ML:1.0 0.00009895 0.08 AML other m 2024-04-21T19:12:54.10
IV.TRIF.CHE. ML:0.8 0.00005567285 0.096 AML other m 2024-04-21T19:12:54.24
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