Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.6 on date 24-05-2017 and time 11:20:25 (Italy) in region 2 km NW Roccastrada (GR)

A magnitude ML 0.6 earthquake occured in region: 2 km NW Roccastrada (GR), on

  • 24-05-2017 09:20:25 (UTC)
  • 24-05-2017 11:20:25 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.0290, 11.1510 at 10 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Roccastrada GR 2 9199 9199
Civitella Paganico GR 11 3154 12353
Monticiano SI 13 1571 13924
Chiusdino SI 15 1903 15827
Montieri GR 16 1204 17031
Campagnatico GR 19 2412 19443

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km N of Grosseto (82087 inhabitants)
36 Km SW of Siena (53903 inhabitants)
77 Km SW of Arezzo (99543 inhabitants)
81 Km S of Scandicci (50609 inhabitants)
83 Km S of Firenze (382808 inhabitants)
90 Km SE of Livorno (159219 inhabitants)
95 Km S of Prato (191150 inhabitants)
98 Km SE of Pisa (89158 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
Bulletin
Rev1000 		ML 0.6 2017-05-24
09:20:25		 43.0288 11.1513 10 2018-07-06
10:38:21		 Bollettino Sismico Italiano INGV 51860771
Reviewed
Rev100 		ML 0.6 2017-05-24
09:20:25		 43.0293 11.1512 10 2017-05-24
09:35:15		 Sala Sismica INGV-Roma 45726471
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-05-24 09:20:25 ± 0.22
Latitude 43.0288 ± 0.0198
Longitude 11.1513 ± 0.0148
Depth (km) 10 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 51860771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2083
Semi-minor axis of confidence ellipse (meter) 1192
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 349
Circular confidence region, given by single value of horizontal uncertainty (meter) 2080.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.60075
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 6
Magnitudes information

ML:0.6

Field Value
Value 0.6
Uncertainty 0.2
Num. used stations 5
Type of magnitude ML
Reference to an origin 51860771
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-11-14 15:48:12

ML:0.6

Field Value
Value 0.6
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 45726471
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-05-24 09:35:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VENT.EHZ. 2017-05-24T09:21:52.41 3.0 undecidable manual Sg 5.17 0
IV.QLNO.HHZ. 2017-05-24T09:21:47.16 3.0 undecidable manual Sg 4.45 0
IV.MFNL.SHZ. 2017-05-24T09:21:45.50 3.0 positive manual Pn -3.11 0
IV.VOBA.HNZ. 2017-05-24T09:21:44.35 3.0 undecidable manual Sn -1.89 0
IV.SERM.HNZ. 2017-05-24T09:21:30.22 3.0 undecidable manual Sg 1.14 0
IV.MCRV.HHZ. 2017-05-24T09:21:27.38 3.0 undecidable manual Pn 2.68 0
IV.NDIM.HNZ. 2017-05-24T09:21:25.55 3.0 undecidable manual Sg -1.23 0
CH.FUORN.HHZ. 2017-05-24T09:21:22.48 3.0 undecidable manual Pn -2.74 0
IV.IMI.HHZ. 2017-05-24T09:21:10.94 3.0 undecidable manual Pn -0.53 0
IV.FSSB.HHZ. 2017-05-24T09:21:09.87 3.0 undecidable manual S -1.02 0
IV.MAON.HHZ. 2017-05-24T09:20:38.40 0.3 undecidable manual P 181 66.6777 50 0.87 56
IV.CASP.HHZ. 2017-05-24T09:20:37.65 0.6 undecidable manual S 221 35.1426 50 -0.14 49
IV.ARCI.HHZ. 2017-05-24T09:20:36.54 0.3 undecidable manual S 127 32.8449 50 -0.62 66
IV.MAGO.HHE. 2017-05-24T09:20:34.90 0.3 undecidable manual P 304 48.2184 50 0.2 71
IV.FROS.HHZ. 2017-05-24T09:20:33.50 0.6 undecidable manual S 1 20.0688 117 0.01 52
IV.TRIF.HHZ. 2017-05-24T09:20:33.67 0.3 undecidable manual S 295 22.2555 114 -0.51 70
IV.ARCI.HHZ. 2017-05-24T09:20:32.41 0.1 undecidable manual P 127 32.8449 50 0.09 100
IV.CASP.HHZ. 2017-05-24T09:20:32.50 0.3 undecidable manual P 221 35.1426 50 -0.18 73
IV.FROS.HHZ. 2017-05-24T09:20:30.25 0.3 undecidable manual P 1 20.0688 117 0.05 77
IV.TRIF.HHZ. 2017-05-24T09:20:30.85 0.3 undecidable manual P 295 22.2555 114 0.25 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.HHE. ML:0.8 0.0000515 1.22 AML other m 2017-05-24T09:20:34.06
IV.ARCI.HHE. ML:0.5 0.0000128246255 1.0208 AML other m 2017-05-24T09:20:36.04
IV.ARCI.HHN. ML:0.5 0.000013137169 0.3392 AML other m 2017-05-24T09:20:36.88
IV.FROS.HHN. ML:0.8 0.00004915 0.28 AML other m 2017-05-24T09:20:37.31
IV.CASP.HHN. ML:0.4 0.000007934557 0.6784 AML other m 2017-05-24T09:20:38.12
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