Istituto Nazionale di Geofisica e Vulcanologia

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) 43.2800, 10.8530 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.

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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
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100 		ML 1.3 2020-03-27
15:11:27		 43.2798 10.8533 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 43.2798 ± 0.0090
Longitude 10.8533 ± 0.0086
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) 920.0
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) 0.00000
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(km) Takeoff_angle Residual Weight
IV.PII.HHZ. 2020-03-27T15:11:45.07 0.6 undecidable manual S 332 55.6998 50 -0.87 40
IV.CELB.HHZ. 2020-03-27T15:11:41.50 0.3 undecidable manual P 222 78.8655 50 -0.05 73
IV.CSNT.HHZ. 2020-03-27T15:11:41.17 0.3 undecidable manual S 59 41.2254 96 -0.31 74
IV.CASP.HHZ. 2020-03-27T15:11:38.61 0.6 undecidable manual P 179 54.3012 50 0.85 40
IV.PII.HHZ. 2020-03-27T15:11:38.09 0.6 undecidable manual P 332 55.6998 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 41.2254 96 0.29 75
IV.FROS.CHZ. 2020-03-27T15:11:35.98 0.3 undecidable manual S 108 25.6521 99 -0.15 79
IV.TRIF.CHZ. 2020-03-27T15:11:33.04 0.3 undecidable manual S 168 18.7701 103 -0.73 68
IV.FROS.CHZ. 2020-03-27T15:11:32.72 0.1 undecidable manual P 108 25.6521 99 0.4 100
IV.MAGO.CHZ. 2020-03-27T15:11:32.62 0.3 undecidable manual S 267 15.7731 105 -0.16 80
IV.TRIF.CHZ. 2020-03-27T15:11:31.02 0.3 undecidable manual P 168 18.7701 103 0.07 81
IV.MAGO.CHZ. 2020-03-27T15:11:30.77 0.3 undecidable manual P 267 15.7731 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 0.0006850000000000001 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 0.00008713639500000001 0.9472 AML other m 2020-03-27T15:11:36.24
IV.FROS.CHE. ML:1.3 0.00013017649000000002 1.5616 AML other m 2020-03-27T15:11:36.20
IV.CSNT.HHN. ML:1.1 0.00004348344 1.5488 AML other m 2020-03-27T15:11:41.73
IV.CSNT.HHE. ML:0.8 0.000018812612 1.4208 AML other m 2020-03-27T15:11:41.72
IV.PII.HHE. ML:1.5 0.00007222297999999999 1.4208 AML other m 2020-03-27T15:11:44.83
IV.PII.HHN. ML:1.2 0.000037709504999999996 1.4208 AML other m 2020-03-27T15:11:44.84
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download