Earthquake with magnitude of ML 1.7 on date 16-05-2020 and time 04:45:35 (Italy) in region 1 km N Montieri (GR)

A magnitude ML 1.7 earthquake occured in region: 1 km N Montieri (GR), on

  • 16-05-2020 02:45:35 (UTC)
  • 16-05-2020 04:45:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.14, 11.02 at 9 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.

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 6 1903 3107
Castelnuovo di Val di Cecina PI 12 2231 5338
Monticiano SI 13 1571 6909
Monterotondo Marittimo GR 13 1371 8280
Radicondoli SI 13 914 9194
Massa Marittima GR 15 8375 17569
Roccastrada GR 19 9199 26768

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km SW of Siena (53903 inhabitants)
43 Km N of Grosseto (82087 inhabitants)
70 Km S of Scandicci (50609 inhabitants)
72 Km S of Firenze (382808 inhabitants)
73 Km SE of Livorno (159219 inhabitants)
79 Km W of Arezzo (99543 inhabitants)
81 Km SE of Pisa (89158 inhabitants)
82 Km S of Prato (191150 inhabitants)
88 Km S of Pistoia (90315 inhabitants)
89 Km SE of Lucca (89046 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 100 ML 1.7 2020-05-16
02:45:35
43.14 11.02 9 2020-05-16
02:52:20
Sala Sismica INGV-Roma 79185121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-16 02:45:35 ± 0.15
Latitude 43.14 ± 0.01
Longitude 11.02 ± 0.01
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 79185121

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1343
Semi-minor axis of confidence ellipse (meter) 456
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 310
Circular confidence region, given by single value of horizontal uncertainty (meter) 1340
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 139
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.45
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.71856
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 10
Magnitude information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 79185121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-16 02:52:20
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NDIM.HHZ. 2020-05-16T02:46:26.42 3.0 undecidable manual Sn -3.22 0
IV.MAON.HHZ. 2020-05-16T02:45:50.40 0.1 undecidable manual P 173 0.7186 50 0.69 76
IV.CELB.HHZ. 2020-05-16T02:45:50.47 0.1 undecidable manual P 236 0.7114 50 0.88 70
IV.CSNT.HHZ. 2020-05-16T02:45:49.41 0.3 undecidable manual S 31 0.3849 50 -0.66 62
IV.CASP.HHZ. 2020-05-16T02:45:48.66 0.1 undecidable manual S 198 0.3687 50 -0.95 73
TV.SF04.EHZ. 2020-05-16T02:45:47.26 0.1 undecidable manual P 123 0.5603 50 0.26 89
TV.SF01.EHZ. 2020-05-16T02:45:46.36 0.1 undecidable manual P 130 0.5171 50 0.1 93
IV.ARCI.HHZ. 2020-05-16T02:45:45.03 0.1 undecidable manual P 131 0.4425 50 0.05 95
IV.CSNT.HHZ. 2020-05-16T02:45:43.90 0.1 undecidable manual P 31 0.3849 50 -0.1 95
IV.RIBO.EHZ.01 2020-05-16T02:45:43.20 0.6 undecidable manual S 174 0.1943 112 -0.58 44
IV.CASP.HHZ. 2020-05-16T02:45:43.63 0.1 undecidable manual P 198 0.3687 50 -0.1 96
IV.FROS.CHZ. 2020-05-16T02:45:41.02 0.3 undecidable manual S 56 0.1205 123 -0.23 73
IV.RIBO.EHZ.01 2020-05-16T02:45:40.41 0.1 undecidable manual P 174 0.1943 112 0.04 100
IV.FROS.CHZ. 2020-05-16T02:45:39.14 0.1 undecidable manual P 56 0.1205 123 0.24 97
IV.TRIF.CHZ. 2020-05-16T02:45:39.98 0.1 undecidable manual S 252 0.089 131 -0.31 97
IV.TRIF.CHZ. 2020-05-16T02:45:38.58 0.1 undecidable manual P 252 0.089 131 0.23 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHE. ML:2.2 0.002485 0.12 AML other m 2020-05-16T02:45:40.39
IV.TRIF.CHN. ML:2.2 0.002225 0.1 AML other m 2020-05-16T02:45:40.42
IV.FROS.CHE. ML:1.8 0.000728 0.62 AML other m 2020-05-16T02:45:41.18
IV.FROS.CHN. ML:2 0.0011 0.42 AML other m 2020-05-16T02:45:41.42
IV.CASP.HHN. ML:2 0.000335 1.68 AML other m 2020-05-16T02:45:48.85
IV.CASP.HHE. ML:1.7 0.000168 0.42 AML other m 2020-05-16T02:45:49.25
IV.CSNT.HHE. ML:1.4 7.905E-5 1.52 AML other m 2020-05-16T02:45:49.81
IV.CSNT.HHN. ML:1.3 6.71E-5 0.16 AML other m 2020-05-16T02:45:49.76
IV.ARCI.HHN. ML:1.4 7.28E-5 0.14 AML other m 2020-05-16T02:45:51.81
IV.ARCI.HHE. ML:1.2 4.52E-5 0.38 AML other m 2020-05-16T02:45:52.25
TV.SF01.EHN. ML:1.7 0.0001197 0.18 AML other m 2020-05-16T02:45:54.69
TV.SF01.EHE. ML:1.9 0.000159 0.36 AML other m 2020-05-16T02:45:54.68
TV.SF04.EHE. ML:1.8 0.0001378 0.18 AML other m 2020-05-16T02:45:56.16
TV.SF04.EHN. ML:1.7 9.18E-5 0.28 AML other m 2020-05-16T02:45:56.24
IV.MAON.HHE. ML:1.7 6.875E-5 0.56 AML other m 2020-05-16T02:46:02.01
IV.MAON.HHN. ML:1.7 7.13E-5 1 AML other m 2020-05-16T02:46:02.54
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