Earthquake (quarry blast) with magnitude of ML 1.1 on date 06-12-2019 and time 10:26:39 (Italy) in region 3 km S Roccastrada (GR)

A magnitude ML 1.1 (quarry blast) earthquake occured in region: 3 km S Roccastrada (GR), on

  • 06-12-2019 09:26:39 (UTC)
  • 06-12-2019 10:26:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.98, 11.16 at 0 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Event type: quarry blast.

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
Roccastrada GR 3 9199 9199
Civitella Paganico GR 10 3154 12353
Campagnatico GR 14 2412 14765
Monticiano SI 18 1571 16336

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km N of Grosseto (82087 inhabitants)
40 Km SW of Siena (53903 inhabitants)
80 Km SW of Arezzo (99543 inhabitants)
86 Km S of Scandicci (50609 inhabitants)
88 Km S of Firenze (382808 inhabitants)
94 Km SE of Livorno (159219 inhabitants)
99 Km NW of Viterbo (67173 inhabitants)
100 Km S of Prato (191150 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 1.1 2019-12-06
09:26:39
42.98 11.16 1 2020-02-28
16:42:21
Bollettino Sismico Italiano INGV 75914421
Reviewed
Rev100
ML 1.1 2019-12-06
09:26:39
43 11.18 3 2019-12-06
16:31:54
Sala Sismica INGV-Roma 74382381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-12-06 09:26:39 ± 0.15
Latitude 42.98 ± 0.01
Longitude 11.16 ± 0.01
Depth (km) 1 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type quarry blast
Origin ID 75914421

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1260
Semi-minor axis of confidence ellipse (meter) 870
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 20
Circular confidence region, given by single value of horizontal uncertainty (meter) 1260
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
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) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.09173
Epicentral distance of station farthest from the epicenter (degree) 0.55398
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 74382381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-12-06 16:31:54

ML:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 75914421
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-01-27 15:59:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MAON.HHN. 2019-12-06T09:26:51.61 0.3 undecidable manual P 182 0.554 50 -0.14 72
TV.SF04.EHZ. 2019-12-06T09:26:48.12 0.1 undecidable manual P 112 0.3921 91 -0.1 100
TV.SF01.EHZ. 2019-12-06T09:26:47.13 0.3 undecidable manual P 120 0.3381 91 0.09 76
IV.ARCI.HHZ. 2019-12-06T09:26:45.69 0.3 undecidable manual P 120 0.2626 91 0.34 73
IV.TRIF.CHZ. 2019-12-06T09:26:45.10 0.3 undecidable manual P 305 0.232 91 0.44 72
IV.CASP.HHZ. 2019-12-06T09:26:45.49 0.3 undecidable manual P 229 0.2905 91 -0.47 71
IV.FROS.CHZ. 2019-12-06T09:26:44.17 0.3 undecidable manual P 359 0.2275 91 -0.4 73
IV.RIBO.EHZ.01 2019-12-06T09:26:41.80 0.3 undecidable manual P 249 0.0917 93 0.26 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ARCI.HHN. ML:1 5.08E-5 0.22 AML other m 2019-12-06T09:26:49.88
IV.FROS.CHE. ML:1.1 8.53E-5 0.34 AML other m 2019-12-06T09:26:50.24
IV.ARCI.HHE. ML:1 4.88E-5 0.42 AML other m 2019-12-06T09:26:50.40
IV.FROS.CHN. ML:1.1 8.42E-5 1.3 AML other m 2019-12-06T09:26:51.76
IV.TRIF.CHE. ML:1.2 9.635E-5 0.76 AML other m 2019-12-06T09:26:54.55
TV.SF04.EHE. ML:1.2 4.5635995E-5 1.184 AML other m 2019-12-06T09:26:54.65
IV.TRIF.CHN. ML:1.2 8.98E-5 0.68 AML other m 2019-12-06T09:26:54.75
TV.SF04.EHN. ML:1.2 5.3432745E-5 0.224 AML other m 2019-12-06T09:26:57.36
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download