Earthquake with magnitude of ML 1.3 on date 27-03-2020 and time 16:11:27 (Italy) in region 3 km SW Pomarance (PI)

A magnitude ML 1.3 earthquake occured in region: 3 km SW Pomarance (PI), on

  • 27-03-2020 15:11:27 (UTC)
  • 27-03-2020 16:11:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.28, 10.85 at 4 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
Pomarance PI 3 5897 5897
Castelnuovo di Val di Cecina PI 9 2231 8128
Volterra PI 14 10519 18647
Monterotondo Marittimo GR 15 1371 20018
Montecatini Val di Cecina PI 15 1749 21767
Radicondoli SI 15 914 22681
Monteverdi Marittimo PI 16 758 23439
Casole d'Elsa SI 17 3897 27336
Guardistallo PI 18 1234 28570
Montescudaio PI 19 2144 30714
Casale Marittimo PI 19 1122 31836

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km W of Siena (53903 inhabitants)
53 Km SE of Livorno (159219 inhabitants)
60 Km SW of Scandicci (50609 inhabitants)
61 Km SE of Pisa (89158 inhabitants)
61 Km NW of Grosseto (82087 inhabitants)
64 Km SW of Firenze (382808 inhabitants)
69 Km SE of Lucca (89046 inhabitants)
70 Km S of Prato (191150 inhabitants)
73 Km S of Pistoia (90315 inhabitants)
81 Km SE of Viareggio (62467 inhabitants)
86 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 1.3 2020-03-27
15:11:27
43.28 10.85 4 2020-03-27
15:28:50
Sala Sismica INGV-Roma 77621021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-03-27 15:11:27 ± 0.15
Latitude 43.28 ± 0.01
Longitude 10.85 ± 0.01
Depth (km) 4 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 77621021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 918
Semi-minor axis of confidence ellipse (meter) 504
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 3
Circular confidence region, given by single value of horizontal uncertainty (meter) 920
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.71046
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 77621021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-03-27 15:28:50
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PII.HHZ. 2020-03-27T15:11:45.07 0.6 undecidable manual S 332 0.5018 50 -0.87 40
IV.CELB.HHZ. 2020-03-27T15:11:41.50 0.3 undecidable manual P 222 0.7105 50 -0.05 73
IV.CSNT.HHZ. 2020-03-27T15:11:41.17 0.3 undecidable manual S 59 0.3714 96 -0.31 74
IV.CASP.HHZ. 2020-03-27T15:11:38.61 0.6 undecidable manual P 179 0.4892 50 0.85 40
IV.PII.HHZ. 2020-03-27T15:11:38.09 0.6 undecidable manual P 332 0.5018 50 0.11 50
IV.FIR.HHZ. 2020-03-27T15:11:36.79 3.0 undecidable manual P 0
IV.CSNT.HHZ. 2020-03-27T15:11:35.69 0.3 undecidable manual P 59 0.3714 96 0.29 75
IV.FROS.CHZ. 2020-03-27T15:11:35.98 0.3 undecidable manual S 108 0.2311 99 -0.15 79
IV.TRIF.CHZ. 2020-03-27T15:11:33.04 0.3 undecidable manual S 168 0.1691 103 -0.73 68
IV.FROS.CHZ. 2020-03-27T15:11:32.72 0.1 undecidable manual P 108 0.2311 99 0.4 100
IV.MAGO.CHZ. 2020-03-27T15:11:32.62 0.3 undecidable manual S 267 0.1421 105 -0.16 80
IV.TRIF.CHZ. 2020-03-27T15:11:31.02 0.3 undecidable manual P 168 0.1691 103 0.07 81
IV.MAGO.CHZ. 2020-03-27T15:11:30.77 0.3 undecidable manual P 267 0.1421 105 0.39 77
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.TRIF.CHE. ML:1.9 0.000685 0.24 AML other m 2020-03-27T15:11:33.68
IV.TRIF.CHN. ML:1.7 0.000409 0.34 AML other m 2020-03-27T15:11:33.74
IV.FROS.CHN. ML:1.1 8.7136395E-5 0.9472 AML other m 2020-03-27T15:11:36.24
IV.FROS.CHE. ML:1.3 0.00013017649 1.5616 AML other m 2020-03-27T15:11:36.20
IV.CSNT.HHN. ML:1.1 4.348344E-5 1.5488 AML other m 2020-03-27T15:11:41.73
IV.CSNT.HHE. ML:0.8 1.8812612E-5 1.4208 AML other m 2020-03-27T15:11:41.72
IV.PII.HHE. ML:1.5 7.222298E-5 1.4208 AML other m 2020-03-27T15:11:44.83
IV.PII.HHN. ML:1.2 3.7709505E-5 1.4208 AML other m 2020-03-27T15:11:44.84
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