Earthquake with magnitude of ML 1.8 on date 05-09-2020 and time 14:21:26 (UTC) in region 1 km W Montieri (GR)

A magnitude ML 1.8 earthquake occured in region: 1 km W Montieri (GR), on

  • 05-09-2020 14:21:26 (UTC)
  • 05-09-2020 16:21:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.137, 11.003 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.

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 1 1204 1204
Chiusdino SI 7 1903 3107
Castelnuovo di Val di Cecina PI 11 2231 5338
Monterotondo Marittimo GR 12 1371 6709
Massa Marittima GR 13 8375 15084
Radicondoli SI 14 914 15998
Monticiano SI 14 1571 17569
Roccastrada GR 19 9199 26768

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km SW of Siena (53903 inhabitants)
43 Km N of Grosseto (82087 inhabitants)
71 Km S of Scandicci (50609 inhabitants)
73 Km SE of Livorno (159219 inhabitants)
73 Km S of Firenze (382808 inhabitants)
80 Km W of Arezzo (99543 inhabitants)
81 Km SE of Pisa (89158 inhabitants)
83 Km S of Prato (191150 inhabitants)
89 Km SE of Lucca (89046 inhabitants)
89 Km S of Pistoia (90315 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 1.8 2020-09-05
14:21:26
43.137 11.003 10 2021-02-26
14:55:58
Bollettino Sismico Italiano INGV 83733731
Reviewed
Rev100
ML 1.7 2020-09-05
14:21:26
43.1395 11.0042 10 2020-09-05
14:33:57
Sala Sismica INGV-Roma 82646241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-05 14:21:26 ± 0.09
Latitude 43.1370 ± 0.0045
Longitude 11.0030 ± 0.0074
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83733731

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 634
Semi-minor axis of confidence ellipse (meter) 389
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 115
Circular confidence region, given by single value of horizontal uncertainty (meter) 630
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 57
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.28
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.72755
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 83733731
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-12 13:37:13

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 82646241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-05 14:33:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OE.WTTA.HHZ. 2020-09-05T14:23:18.35 3.0 undecidable manual Sn -6.75 0
IV.VBKN.HHZ. 2020-09-05T14:23:15.67 3.0 undecidable manual Sg 10.62 0
OX.CIMO.HHZ. 2020-09-05T14:23:14.20 3.0 undecidable manual Sg 9.36 0
CH.MUGIO.HHZ. 2020-09-05T14:23:08.95 3.0 undecidable manual Sg 8.26 0
IV.ACATE.EHZ. 2020-09-05T14:23:03.16 3.0 negative manual Pn -4.46 0
IV.IST3.HHZ. 2020-09-05T14:22:52.95 3.0 positive manual Pn 3.04 0
IV.ZONE.HHZ. 2020-09-05T14:22:51.01 3.0 undecidable manual Sg 0.77 0
IV.EUCT.HNZ. 2020-09-05T14:22:47.95 3.0 undecidable manual Sg 3.1 0
IV.MGR.HHZ. 2020-09-05T14:22:40.42 3.0 positive manual Pn 2.21 0
IV.CAPR.HNZ. 2020-09-05T14:22:39.62 3.0 undecidable manual Sn -8.58 0
CH.FUSIO.HHZ. 2020-09-05T14:22:36.35 3.0 positive manual Pg 7.52 0
IV.VCRE.HHZ. 2020-09-05T14:22:30.85 3.0 undecidable manual Pg 7.62 0
IV.TEOL.HHZ. 2020-09-05T14:22:03.85 3.0 undecidable manual Pn -4.7 0
IV.CRMI.HHZ. 2020-09-05T14:21:48.32 0.6 undecidable manual S 359 0.6583 50 -0.14 50
IV.CAFI.HHZ. 2020-09-05T14:21:40.46 0.6 undecidable manual P 74 0.7276 50 0.25 48
IV.CSNT.HHZ. 2020-09-05T14:21:40.17 0.3 undecidable manual S 32 0.3957 50 -0.49 74
IV.MAON.HHZ. 2020-09-05T14:21:40.16 0.1 undecidable manual P 172 0.7141 50 0.16 99
IV.CASP.HHZ. 2020-09-05T14:21:39.10 0.3 undecidable manual S 196 0.3606 50 -0.52 73
IV.CRMI.HHZ. 2020-09-05T14:21:39.44 0.6 undecidable manual P 359 0.6583 50 0.4 47
IV.PII.HHZ. 2020-09-05T14:21:39.64 0.6 undecidable manual P 329 0.6799 50 0.24 49
TV.SF04.EHZ. 2020-09-05T14:21:37.69 0.3 undecidable manual P 122 0.5675 50 0.21 75
IV.MAGO.CHZ. 2020-09-05T14:21:36.82 0.3 undecidable manual S 299 0.286 50 -0.6 72
TV.SF01.EHZ. 2020-09-05T14:21:36.82 0.3 undecidable manual P 128 0.5225 50 0.1 78
IV.OSSC.HNZ. 2020-09-05T14:21:35.42 0.1 undecidable manual P 24 0.4245 50 0.38 100
IV.CASP.HHZ. 2020-09-05T14:21:34.15 0.3 undecidable manual P 196 0.3606 50 0.21 79
IV.CSNT.HHZ. 2020-09-05T14:21:34.63 0.3 undecidable manual P 32 0.3957 50 0.09 80
IV.RIBO.EHE.01 2020-09-05T14:21:33.84 0.3 undecidable manual S 170 0.1907 115 -0.4 78
IV.MAGO.CHZ. 2020-09-05T14:21:32.79 0.3 undecidable manual P 299 0.286 50 0.12 81
IV.FROS.CHN. 2020-09-05T14:21:31.77 0.3 undecidable manual S 57 0.1331 123 -0.54 76
IV.TRIF.CHE. 2020-09-05T14:21:30.58 0.3 undecidable manual S 253 0.0764 139 -0.06 86
IV.RIBO.EHE.01 2020-09-05T14:21:30.99 0.3 undecidable manual P 170 0.1907 115 0.15 82
IV.TRIF.CHE. 2020-09-05T14:21:29.11 0.3 undecidable manual P 253 0.0764 139 0.36 81
IV.FROS.CHN. 2020-09-05T14:21:29.77 0.3 undecidable manual P 57 0.1331 123 0.05 85
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MAGO.CHN. ML:1.8 0.0002905 0.4 AML other m 2020-09-05T14:21:37.77
IV.MAGO.CHE. ML:1.6 0.000203 0.7 AML other m 2020-09-05T14:21:38.57
IV.CASP.HHE. ML:2.2 0.000506 0.7 AML other m 2020-09-05T14:21:39.27
IV.CASP.HHN. ML:2.2 0.0005225 0.32 AML other m 2020-09-05T14:21:39.38
IV.CSNT.HHE. ML:1.6 0.000133 0.46 AML other m 2020-09-05T14:21:40.41
IV.CSNT.HHN. ML:1.6 0.00012 0.16 AML other m 2020-09-05T14:21:40.44
TV.SF04.EHE. ML:1.6 8.315E-5 1.5 AML other m 2020-09-05T14:21:47.03
TV.SF04.EHN. ML:1.8 0.00010885 0.62 AML other m 2020-09-05T14:21:47.62
IV.CRE.HHE. ML:0 2.065E-5 0.6 AML other m 2020-09-05T14:21:57.74
IV.CRE.HHN. ML:0 2.26E-5 1.72 AML other m 2020-09-05T14:22:00.87
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