Earthquake with magnitude of ML 0.9 on date 19-11-2020 and time 16:01:50 (Italy) in region 3 km NW Montieri (GR)

A magnitude ML 0.9 earthquake occured in region: 3 km NW Montieri (GR), on

  • 19-11-2020 15:01:50 (UTC)
  • 19-11-2020 16:01:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.159, 10.996 at 6 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Montieri GR 4 1204 1204
Chiusdino SI 8 1903 3107
Castelnuovo di Val di Cecina PI 9 2231 5338
Monterotondo Marittimo GR 11 1371 6709
Radicondoli SI 12 914 7623
Massa Marittima GR 15 8375 15998
Monticiano SI 15 1571 17569
Pomarance PI 19 5897 23466

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km SW of Siena (53903 inhabitants)
45 Km N of Grosseto (82087 inhabitants)
68 Km S of Scandicci (50609 inhabitants)
71 Km SE of Livorno (159219 inhabitants)
71 Km SW of Firenze (382808 inhabitants)
78 Km SE of Pisa (89158 inhabitants)
80 Km W of Arezzo (99543 inhabitants)
81 Km S of Prato (191150 inhabitants)
86 Km SE of Lucca (89046 inhabitants)
87 Km S of Pistoia (90315 inhabitants)
99 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
Bulletin
Rev1000
ML 0.9 2020-11-19
15:01:50
43.1587 10.9962 6 2021-02-26
14:56:18
Bollettino Sismico Italiano INGV 86991811
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-11-19 15:01:50 ± 0.17
Latitude 43.1587 ± 0.0063
Longitude 10.9962 ± 0.0074
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86991811

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 689
Semi-minor axis of confidence ellipse (meter) 503
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 142
Circular confidence region, given by single value of horizontal uncertainty (meter) 690
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 189
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.08094
Epicentral distance of station farthest from the epicenter (degree) 0.38041
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 5
Type of magnitude ML
Reference to an origin 86991811
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-10 10:40:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CASP.HHZ. 2020-11-19T15:01:58.82 0.6 undecidable manual P 195 0.3804 50 -0.23 46
IV.RIBO.EHZ.01 2020-11-19T15:01:58.95 0.3 undecidable manual S 170 0.2131 105 -0.06 74
IV.RIBO.EHZ.01 2020-11-19T15:01:55.59 0.1 undecidable manual P 170 0.2131 105 0.17 97
IV.FROS.CHZ. 2020-11-19T15:01:55.75 0.3 undecidable manual S 66 0.1277 114 -0.15 74
IV.TRIF.CHZ. 2020-11-19T15:01:54.18 0.3 undecidable manual S 237 0.0809 125 -0.17 74
IV.FROS.CHZ. 2020-11-19T15:01:53.72 0.1 undecidable manual P 66 0.1277 114 0.09 100
IV.TRIF.CHZ. 2020-11-19T15:01:52.87 0.1 undecidable manual P 237 0.0809 125 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHE. ML:1 0.0001652924 0.064 AML other m 2020-11-19T15:01:54.48
IV.TRIF.CHN. ML:1 0.00016043185 0.0768 AML other m 2020-11-19T15:01:54.87
IV.FROS.CHE. ML:1 0.00011163059 0.1152 AML other m 2020-11-19T15:01:55.82
IV.FROS.CHN. ML:0.8 6.576725E-5 0.1024 AML other m 2020-11-19T15:01:56.35
IV.RIBO.EHE.01 ML:0.9 5.0603245E-5 0.2048 AML other m 2020-11-19T15:01:59.13
IV.CASP.HHE. ML:0.2 5.5332315E-6 0.0512 AML other m 2020-11-19T15:02:04.17
IV.CASP.HHN. ML:0.2 3.153806E-6 0.0896 AML other m 2020-11-19T15:02:03.95
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