Earthquake with magnitude of ML 1.5 on date 28-08-2020 and time 01:40:12 (Italy) in region 5 km E Monteverdi Marittimo (PI)

A magnitude ML 1.5 earthquake occured in region: 5 km E Monteverdi Marittimo (PI), on

  • 27-08-2020 23:40:12 (UTC)
  • 28-08-2020 01:40:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.2, 10.77 at 6 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
Monteverdi Marittimo PI 5 758 758
Monterotondo Marittimo GR 9 1371 2129
Castelnuovo di Val di Cecina PI 11 2231 4360
Sassetta LI 13 514 4874
Pomarance PI 14 5897 10771
Castagneto Carducci LI 14 9010 19781
Suvereto LI 15 3072 22853
Bibbona LI 16 3175 26028
Casale Marittimo PI 17 1122 27150
Guardistallo PI 17 1234 28384
Montescudaio PI 18 2144 30528
Massa Marittima GR 19 8375 38903

Municipalities with at least 50000 inhabitants

An earthquake occurred to
47 Km W of Siena (53903 inhabitants)
54 Km SE of Livorno (159219 inhabitants)
56 Km NW of Grosseto (82087 inhabitants)
65 Km SE of Pisa (89158 inhabitants)
70 Km SW of Scandicci (50609 inhabitants)
74 Km SW of Firenze (382808 inhabitants)
75 Km SE of Lucca (89046 inhabitants)
80 Km SW of Prato (191150 inhabitants)
83 Km S of Pistoia (90315 inhabitants)
85 Km SE of Viareggio (62467 inhabitants)
95 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
Reviewed
Rev100
ML 1.5 2020-08-27
23:40:12
43.2 10.77 6 2020-08-27
23:49:54
Sala Sismica INGV-Roma 82393781
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-27 23:40:12 ± 0.12
Latitude 43.20 ± 0.01
Longitude 10.77 ± 0.01
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 82393781

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1238
Semi-minor axis of confidence ellipse (meter) 505
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 33
Circular confidence region, given by single value of horizontal uncertainty (meter) 1240
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 107
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 12
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) 0.69608
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 82393781
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-08-27 23:49:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PANTE.HHZ. 2020-08-27T23:42:04.74 3.0 undecidable manual Pg 15.62 0
GU.RRL.HHZ. 2020-08-27T23:41:56.10 3.0 undecidable manual Sg 7.79 0
IV.SPS2.HHZ. 2020-08-27T23:41:44.15 3.0 negative manual Pn 3.84 0
IV.CRND.HNZ. 2020-08-27T23:41:39.66 3.0 undecidable manual Sg 2.19 0
OT.OT11.EHZ. 2020-08-27T23:41:26.34 3.0 positive manual Pg 12.48 0
IV.AGLI.HHZ. 2020-08-27T23:41:21.12 3.0 undecidable manual Sn -2.04 0
IV.PAOL.HHZ. 2020-08-27T23:41:11.13 3.0 undecidable manual Pn 0.56 0
IV.MNTT.EHZ. 2020-08-27T23:40:53.71 3.0 negative manual Pg 2.83 0
IV.RCAV.EHZ. 2020-08-27T23:40:52.10 3.0 undecidable manual Pg 1.64 0
IV.CASP.HHZ. 2020-08-27T23:40:27.44 0.1 undecidable manual S 171 0.4146 50 -0.5 86
IV.FIR.HHZ. 2020-08-27T23:40:26.34 3.0 undecidable manual P -3.98 0
Z3.A317A.HHZ. 2020-08-27T23:40:26.69 0.1 undecidable manual P 258 0.6961 50 0.65 76
IV.CELB.HHZ. 2020-08-27T23:40:24.81 0.6 positive manual P 222 0.6124 50 0.2 44
IV.PII.HHZ. 2020-08-27T23:40:23.72 0.6 positive manual P 341 0.5522 50 0.15 45
IV.FROS.CHE. 2020-08-27T23:40:22.81 0.3 undecidable manual S 88 0.2788 101 -0.15 71
IV.CASP.HHZ. 2020-08-27T23:40:21.05 0.1 undecidable manual P 171 0.4146 50 -0.17 92
IV.RIBO.EHZ.01 2020-08-27T23:40:19.40 1.0 undecidable manual P 142 0.3202 99 0.13 24
IV.FROS.CHE. 2020-08-27T23:40:18.43 0.3 undecidable manual P 88 0.2788 101 0.08 72
IV.TRIF.CHZ. 2020-08-27T23:40:17.36 0.3 undecidable manual S 132 0.1268 113 0.02 75
IV.MAGO.CHZ. 2020-08-27T23:40:16.33 0.3 undecidable manual S 311 0.1115 115 -0.49 68
IV.TRIF.CHZ. 2020-08-27T23:40:15.53 0.3 negative manual P 132 0.1268 113 0.43 69
IV.MAGO.CHZ. 2020-08-27T23:40:14.76 0.1 positive manual P 311 0.1115 115 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MAGO.CHE. ML:1.2 0.0002325 0.36 AML other m 2020-08-27T23:40:16.45
IV.TRIF.CHE. ML:1.1 0.0001615 0.12 AML other m 2020-08-27T23:40:18.21
IV.MAGO.CHN. ML:1.4 0.0003305 0.12 AML other m 2020-08-27T23:40:19.14
IV.TRIF.CHN. ML:1.2 0.000186 0.84 AML other m 2020-08-27T23:40:20.71
IV.CELB.HHE. ML:1.6 7.14E-5 0.28 AML other m 2020-08-27T23:40:25.22
IV.FIR.HHN. ML:2 0.000142 1.32 AML other m 2020-08-27T23:40:29.19
IV.FIR.HHE. ML:2 0.000165 0.06 AML other m 2020-08-27T23:40:33.19
IV.CELB.HHN. ML:1.6 6.26E-5 1.2 AML other m 2020-08-27T23:40:33.15
IV.RCAV.EHN. ML:2.1 2.46E-5 1.04 AML other m 2020-08-27T23:40:52.18
IV.RCAV.EHE. ML:2.1 2.5033E-5 0.16 AML other m 2020-08-27T23:40:56.75
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