Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 14-04-2020 and time 03:59:05 (UTC) in region 5 km W Pomarance (PI)

A magnitude ML 1.4 earthquake occured in region: 5 km W Pomarance (PI), on

  • 14-04-2020 03:59:05 (UTC)
  • 14-04-2020 05:59:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.3120, 10.8180 at 7 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 5 5897 5897
Volterra PI 11 10519 16416
Montecatini Val di Cecina PI 11 1749 18165
Castelnuovo di Val di Cecina PI 14 2231 20396
Guardistallo PI 15 1234 21630
Montescudaio PI 15 2144 23774
Casale Marittimo PI 16 1122 24896
Monteverdi Marittimo PI 17 758 25654
Bibbona LI 18 3175 28829
Riparbella PI 19 1603 30432
Casole d'Elsa SI 19 3897 34329
Monterotondo Marittimo GR 19 1371 35700
Radicondoli SI 19 914 36614
Lajatico PI 20 1336 37950

Municipalities with at least 50000 inhabitants

An earthquake occurred to
42 Km W of Siena (53903 inhabitants)
49 Km SE of Livorno (159219 inhabitants)
56 Km SE of Pisa (89158 inhabitants)
58 Km SW of Scandicci (50609 inhabitants)
62 Km SW of Firenze (382808 inhabitants)
65 Km SE of Lucca (89046 inhabitants)
66 Km NW of Grosseto (82087 inhabitants)
67 Km SW of Prato (191150 inhabitants)
70 Km S of Pistoia (90315 inhabitants)
77 Km SE of Viareggio (62467 inhabitants)
88 Km W of Arezzo (99543 inhabitants)
97 Km SE of Massa (69479 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 1.4 2020-04-14
03:59:05		 43.3122 10.8183 7 2020-04-14
04:12:02		 Sala Sismica INGV-Roma 78185981
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-04-14 03:59:05 ± 0.23
Latitude 43.3122 ± 0.0189
Longitude 10.8183 ± 0.0148
Depth (km) 7 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 78185981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1999
Semi-minor axis of confidence ellipse (meter) 1031
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 195
Circular confidence region, given by single value of horizontal uncertainty (meter) 2000.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 92
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.52
Epicentral distance of station closest to the epicenter (degree) 0.12321
Epicentral distance of station farthest from the epicenter (degree) 0.52251
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 8
Type of magnitude ML
Reference to an origin 78185981
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-04-14 04:12:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PII.HHZ. 2020-04-14T03:59:21.09 0.3 undecidable manual S 333 51.2154 50 -1.26 48
IV.CSNT.HHZ. 2020-04-14T03:59:19.75 0.1 undecidable manual S 65 42.0246 50 -0.14 99
IV.CASP.HHZ. 2020-04-14T03:59:16.75 0.3 undecidable manual P 176 57.9975 50 0.57 65
IV.PII.HHZ. 2020-04-14T03:59:15.28 0.1 undecidable manual P 333 51.2154 50 0.14 98
IV.FROS.CHZ. 2020-04-14T03:59:15.53 0.1 undecidable manual S 112 29.5482 103 -0.3 98
IV.CSNT.HHZ. 2020-04-14T03:59:14.16 0.1 positive manual P 65 42.0246 50 0.44 93
IV.TRIF.CHZ. 2020-04-14T03:59:12.88 0.1 undecidable manual S 163 22.9548 107 -0.73 87
IV.FROS.CHZ. 2020-04-14T03:59:11.79 0.1 undecidable manual P 112 29.5482 103 0.41 96
IV.MAGO.CHZ. 2020-04-14T03:59:10.32 0.6 undecidable manual S 252 13.6752 117 -0.28 51
IV.TRIF.CHZ. 2020-04-14T03:59:10.32 0.3 undecidable manual P 163 22.9548 107 0.23 76
IV.MAGO.CHZ. 2020-04-14T03:59:08.71 0.1 positive manual P 252 13.6752 117 0.35 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MAGO.CHE. ML:1.9 0.0010400000000000001 0.08 AML other m 2020-04-14T03:59:10.36
IV.MAGO.CHN. ML:1.8 0.0007989999999999999 0.1 AML other m 2020-04-14T03:59:10.67
IV.TRIF.CHN. ML:1.6 0.0002445 1.04 AML other m 2020-04-14T03:59:13.77
IV.TRIF.CHE. ML:1.6 0.0003025 1.46 AML other m 2020-04-14T03:59:13.00
IV.FROS.CHN. ML:1.2 0.00008675 0.48 AML other m 2020-04-14T03:59:15.52
IV.FROS.CHE. ML:1.1 0.00006925 0.22 AML other m 2020-04-14T03:59:17.49
IV.PII.HHN. ML:1.1 0.000030350000000000002 0.24 AML other m 2020-04-14T03:59:23.25
IV.PII.HHE. ML:1.2 0.000038100000000000005 0.54 AML other m 2020-04-14T03:59:23.68
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