Earthquake with magnitude of ML 1.1 on date 27-05-2020 and time 20:33:38 (Italy) in region 6 km NW Chiusdino (SI)

A magnitude ML 1.1 earthquake occured in region: 6 km NW Chiusdino (SI), on

  • 27-05-2020 18:33:38 (UTC)
  • 27-05-2020 20:33:38 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.2, 11.03 at 11 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
Chiusdino SI 6 1903 1903
Montieri GR 7 1204 3107
Radicondoli SI 7 914 4021
Castelnuovo di Val di Cecina PI 10 2231 6252
Monticiano SI 14 1571 7823
Monterotondo Marittimo GR 15 1371 9194
Casole d'Elsa SI 16 3897 13091
Pomarance PI 17 5897 18988
Sovicille SI 19 10116 29104
Massa Marittima GR 20 8375 37479

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km W of Siena (53903 inhabitants)
49 Km N of Grosseto (82087 inhabitants)
64 Km S of Scandicci (50609 inhabitants)
66 Km S of Firenze (382808 inhabitants)
71 Km SE of Livorno (159219 inhabitants)
75 Km W of Arezzo (99543 inhabitants)
76 Km S of Prato (191150 inhabitants)
77 Km SE of Pisa (89158 inhabitants)
83 Km S of Pistoia (90315 inhabitants)
84 Km SE of Lucca (89046 inhabitants)
98 Km SE of Viareggio (62467 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 1.1 2020-05-27
18:33:38
43.2 11.03 11 2020-05-27
18:45:13
Sala Sismica INGV-Roma 79629021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-27 18:33:38 ± 0.13
Latitude 43.20 ± 0.01
Longitude 11.03 ± 0.01
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 79629021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1109
Semi-minor axis of confidence ellipse (meter) 705
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 146
Circular confidence region, given by single value of horizontal uncertainty (meter) 1110
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 19
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) 0.33455
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 5
Magnitude information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 79629021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-05-27 18:45:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PAOL.HHZ. 2020-05-27T18:35:10.72 3.0 undecidable manual Sn 0.64 0
IV.ROSPO.HHZ. 2020-05-27T18:35:03.39 3.0 undecidable manual Sn 4.82 0
IV.BRSN.EHZ. 2020-05-27T18:34:10.96 3.0 undecidable manual S -0.19 0
IV.RMP.HHZ. 2020-05-27T18:34:10.52 3.0 positive manual Pn 2.4 0
IV.CELB.HHZ. 2020-05-27T18:33:54.58 3.0 undecidable manual P -0.07 0
TV.SF04.EHZ. 2020-05-27T18:33:50.79 3.0 positive manual P 0.96 0
TV.SF01.EHZ. 2020-05-27T18:33:50.31 3.0 undecidable manual P 0.69 0
IV.CSNT.HHZ. 2020-05-27T18:33:50.74 0.3 undecidable manual S 34 0.3345 50 -0.15 71
IV.RONT.HHZ. 2020-05-27T18:33:48.77 3.0 negative manual P 0.98 0
IV.CASP.HHZ. 2020-05-27T18:33:48.40 3.0 undecidable manual P -1.29 0
IV.RIBO.EHZ.01 2020-05-27T18:33:48.12 0.3 undecidable manual S 177 0.2473 50 -0.17 72
IV.MAGO.CHZ. 2020-05-27T18:33:48.83 0.3 undecidable manual S 286 0.2824 50 -0.51 66
IV.CSNT.HHZ. 2020-05-27T18:33:46.23 1.0 undecidable manual P 34 0.3345 50 0.62 21
IV.MAGO.CHZ. 2020-05-27T18:33:45.10 0.1 undecidable manual P 286 0.2824 50 0.39 91
IV.TRIF.CHZ. 2020-05-27T18:33:44.18 0.3 undecidable manual S 229 0.1241 128 -0.24 72
IV.RIBO.EHZ.01 2020-05-27T18:33:44.61 1.0 positive manual P 177 0.2473 50 0.5 22
IV.FROS.CHZ. 2020-05-27T18:33:43.20 0.3 undecidable manual S 81 0.0917 136 -0.3 72
IV.TRIF.CHZ. 2020-05-27T18:33:42.20 0.3 undecidable manual P 229 0.1241 128 0.33 71
IV.FROS.CHZ. 2020-05-27T18:33:41.45 0.1 positive manual P 81 0.0917 136 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.FROS.CHE. ML:1.3 0.00022067845 0.3456 AML other m 2020-05-27T18:33:45.36
IV.FROS.CHN. ML:1.3 0.00025771155 0.2176 AML other m 2020-05-27T18:33:43.28
IV.TRIF.CHE. ML:1.5 0.0003150105 0.1024 AML other m 2020-05-27T18:33:45.02
IV.TRIF.CHN. ML:1.5 0.00031787845 0.0896 AML other m 2020-05-27T18:33:44.51
IV.RIBO.EHE.01 ML:1.1 7.091974E-5 0.1664 AML other m 2020-05-27T18:33:48.29
IV.MAGO.CHN. ML:0.9 3.8253215E-5 0.1024 AML other m 2020-05-27T18:33:49.92
IV.MAGO.CHE. ML:1 4.3097045E-5 0.0896 AML other m 2020-05-27T18:33:49.36
IV.CSNT.HHN. ML:0.9 3.0850655E-5 0.2432 AML other m 2020-05-27T18:33:50.85
IV.CSNT.HHE. ML:0.7 2.092784E-5 0.1792 AML other m 2020-05-27T18:33:51.01
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