Earthquake with magnitude of ML 1.6 on date 09-05-2020 and time 14:11:29 (Italy) in region 4 km W Monterotondo Marittimo (GR)

A magnitude ML 1.6 earthquake occured in region: 4 km W Monterotondo Marittimo (GR), on

  • 09-05-2020 12:11:29 (UTC)
  • 09-05-2020 14:11:29 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.14, 10.81 at 8 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
Monterotondo Marittimo GR 4 1371 1371
Monteverdi Marittimo PI 9 758 2129
Castelnuovo di Val di Cecina PI 11 2231 4360
Massa Marittima GR 12 8375 12735
Suvereto LI 13 3072 15807
Sassetta LI 13 514 16321
Castagneto Carducci LI 16 9010 25331
Montieri GR 17 1204 26535
Campiglia Marittima LI 18 13218 39753
Pomarance PI 18 5897 45650

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km W of Siena (53903 inhabitants)
49 Km NW of Grosseto (82087 inhabitants)
61 Km SE of Livorno (159219 inhabitants)
72 Km SE of Pisa (89158 inhabitants)
75 Km SW of Scandicci (50609 inhabitants)
79 Km SW of Firenze (382808 inhabitants)
82 Km SE of Lucca (89046 inhabitants)
85 Km S of Prato (191150 inhabitants)
89 Km S of Pistoia (90315 inhabitants)
92 Km SE of Viareggio (62467 inhabitants)
94 Km W of Arezzo (99543 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 1.6 2020-05-09
12:11:29
43.14 10.81 8 2020-05-09
12:17:22
Sala Sismica INGV-Roma 78981741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-09 12:11:29 ± 0.14
Latitude 43.14 ± 0.01
Longitude 10.81 ± 0.01
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 78981741

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1182
Semi-minor axis of confidence ellipse (meter) 521
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 40
Circular confidence region, given by single value of horizontal uncertainty (meter) 1180
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 147
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.33
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.35433
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.4
Num. used stations 8
Type of magnitude ML
Reference to an origin 78981741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-09 12:17:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MBFT.HHZ. 2020-05-09T12:13:04.68 3.0 undecidable manual Pg 13.01 0
IV.SPS2.HHZ. 2020-05-09T12:12:57.60 3.0 undecidable manual Pn 2.67 0
IV.RNI2.HHZ. 2020-05-09T12:12:54.56 3.0 undecidable manual Sn 2.1 0
IV.MILN.HNZ. 2020-05-09T12:12:42.20 3.0 undecidable manual Sn -3.94 0
IV.VCEL.EHZ. 2020-05-09T12:12:40.12 3.0 undecidable manual Sn 0.07 0
IV.CRTC.HHZ. 2020-05-09T12:12:27.25 3.0 undecidable manual Sg 4.68 0
IV.LRP.EHZ. 2020-05-09T12:12:15.39 3.0 undecidable manual Pn 3.48 0
IV.VVLD.HHZ. 2020-05-09T12:12:13.69 3.0 negative manual Pn 3.2 0
GU.GSCL.HHZ. 2020-05-09T12:11:53.96 3.0 undecidable manual P 0.11 0
TV.SF04.EHZ. 2020-05-09T12:11:44.42 3.0 undecidable manual P -0.22 0
IV.CASP.HHZ. 2020-05-09T12:11:42.95 0.3 undecidable manual S 173 0.3543 50 -0.24 70
IV.CELB.HHZ. 2020-05-09T12:11:42.64 3.0 positive manual P -0.05 0
IV.FROS.CHZ. 2020-05-09T12:11:39.78 0.3 undecidable manual S 75 0.2617 105 -0.16 72
IV.RIBO.EHN.01 2020-05-09T12:11:39.54 0.3 undecidable manual S 138 0.2599 105 -0.34 70
IV.CASP.HHZ. 2020-05-09T12:11:37.45 0.1 undecidable manual P 173 0.3543 50 0.04 97
IV.MAGO.CHZ. 2020-05-09T12:11:36.22 0.1 undecidable manual S 320 0.1709 112 -0.4 94
IV.FROS.CHZ. 2020-05-09T12:11:35.61 0.1 undecidable manual P 75 0.2617 105 0.07 98
IV.RIBO.EHN.01 2020-05-09T12:11:35.93 0.3 undecidable manual P 138 0.2599 105 0.44 68
IV.MAGO.CHZ. 2020-05-09T12:11:33.96 0.1 positive manual P 320 0.1709 112 0.34 95
IV.TRIF.CHZ. 2020-05-09T12:11:33.25 0.1 undecidable manual S 112 0.0737 134 -0.17 100
IV.TRIF.CHZ. 2020-05-09T12:11:32.11 0.1 undecidable manual P 112 0.0737 134 0.34 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MAGO.CHE. ML:1.6 0.000303 0.34 AML other m 2020-05-09T12:11:36.62
IV.MAGO.CHN. ML:1.4 0.000226 0.52 AML other m 2020-05-09T12:11:36.76
IV.FROS.CHN. ML:1.3 9.595E-5 1.68 AML other m 2020-05-09T12:11:40.12
IV.FROS.CHE. ML:1.2 8.86E-5 1 AML other m 2020-05-09T12:11:41.09
IV.CELB.HHN. ML:1.5 5.63E-5 0.86 AML other m 2020-05-09T12:11:43.35
IV.CELB.HHE. ML:1.7 8.335E-5 0.84 AML other m 2020-05-09T12:11:54.69
IV.VCEL.EHE. ML:3 0.0001675 0.06 AML other m 2020-05-09T12:13:12.07
IV.VCEL.EHN. ML:2.8 0.0001215 1.64 AML other m 2020-05-09T12:13:12.93
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