Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.8 on date 28-05-2019 and time 04:04:39 (Italy) in region 1 km NW Montieri (GR)

A magnitude ML 0.8 earthquake occured in region: 1 km NW Montieri (GR), on

  • 28-05-2019 02:04:39 (UTC)
  • 28-05-2019 04:04:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.1370, 11.0080 at 10 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.

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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
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 14 8375 15084
Monticiano SI 14 1571 16655
Radicondoli SI 14 914 17569
Roccastrada GR 19 9199 26768

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 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
Reviewed
Rev100 		ML 0.8 2019-05-28
02:04:39		 43.137 11.0075 10 2019-05-28
02:10:27		 Sala Sismica INGV-Roma 68961881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-05-28 02:04:39 ± 0.18
Latitude 43.1370 ± 0.0099
Longitude 11.0075 ± 0.0160
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 68961881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1335
Semi-minor axis of confidence ellipse (meter) 836
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) 1340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 115
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.55
Epicentral distance of station closest to the epicenter (degree) 0.08004
Epicentral distance of station farthest from the epicenter (degree) 0.39390
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.3
Num. used stations 11
Type of magnitude ML
Reference to an origin 68961881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-05-28 02:10:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CSNT.HHZ. 2019-05-28T02:04:53.72 0.3 undecidable manual S 31 43.7229 50 -0.39 69
IV.CASP.HHZ. 2019-05-28T02:04:52.80 0.3 undecidable manual S 197 40.1265 50 -0.35 70
IV.MAGO.CHZ. 2019-05-28T02:04:50.11 0.1 undecidable manual S 298 32.0457 50 -0.89 78
IV.CSNT.HHZ. 2019-05-28T02:04:48.38 0.3 undecidable manual P 31 43.7229 50 0.36 69
IV.RIBO.EHZ.01 2019-05-28T02:04:47.16 0.1 undecidable manual S 171 21.0678 115 -0.61 89
IV.MAGO.CHZ. 2019-05-28T02:04:47.00 0.1 undecidable manual P 298 32.0457 50 0.77 82
IV.CASP.HHZ. 2019-05-28T02:04:47.99 0.1 undecidable manual P 197 40.1265 50 0.52 89
IV.FROS.CHZ. 2019-05-28T02:04:45.39 0.1 undecidable manual S 56 14.4744 124 -0.38 97
IV.RIBO.EHZ.01 2019-05-28T02:04:44.73 0.1 undecidable manual P 171 21.0678 115 0.37 96
IV.TRIF.CHZ. 2019-05-28T02:04:44.02 0.1 undecidable manual S 254 8.88 138 -0.26 100
IV.FROS.CHZ. 2019-05-28T02:04:43.49 0.1 undecidable manual P 56 14.4744 124 0.29 98
IV.TRIF.CHZ. 2019-05-28T02:04:42.76 0.1 undecidable manual P 254 8.88 138 0.41 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHE. ML:1.5 0.00039989085000000004 0.184 AML other m 2019-05-28T02:04:45.04
IV.TRIF.CHN. ML:1.5 0.00039463409999999997 0.112 AML other m 2019-05-28T02:04:44.27
IV.FROS.CHE. ML:0.7 0.0000497373685 0.096 AML other m 2019-05-28T02:04:45.59
IV.FROS.CHN. ML:0.7 0.00004537458 0.184 AML other m 2019-05-28T02:04:45.63
IV.RIBO.EHE.01 ML:0.9 0.000058781255 0.2 AML other m 2019-05-28T02:04:48.07
IV.MAGO.CHN. ML:0.4 0.000010725992 0.12 AML other m 2019-05-28T02:04:50.34
IV.MAGO.CHE. ML:0.9 0.000035158275000000003 1.32 AML other m 2019-05-28T02:05:00.27
IV.CASP.HHN. ML:0.9 0.000027399765 0.5792 AML other m 2019-05-28T02:04:56.40
IV.CASP.HHE. ML:1.0 0.00003276843 2.28 AML other m 2019-05-28T02:05:03.07
IV.CSNT.HHN. ML:0.7 0.000015332474999999998 2.04 AML other m 2019-05-28T02:05:05.38
IV.CSNT.HHE. ML:0.7 0.00001720527 1.8192 AML other m 2019-05-28T02:05:00.33
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