Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 15-01-2020 and time 02:36:15 (Italy) in region 4 km W Pomarance (PI)

A magnitude ML 1.0 earthquake occured in region: 4 km W Pomarance (PI), on

  • 15-01-2020 01:36:15 (UTC)
  • 15-01-2020 02:36:15 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.2960, 10.8290 at 5 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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 4 5897 5897
Castelnuovo di Val di Cecina PI 12 2231 8128
Volterra PI 12 10519 18647
Montecatini Val di Cecina PI 13 1749 20396
Guardistallo PI 16 1234 21630
Monteverdi Marittimo PI 16 758 22388
Montescudaio PI 17 2144 24532
Monterotondo Marittimo GR 17 1371 25903
Casale Marittimo PI 17 1122 27025
Radicondoli SI 18 914 27939
Casole d'Elsa SI 18 3897 31836
Bibbona LI 19 3175 35011

Municipalities with at least 50000 inhabitants

An earthquake occurred to
41 Km W of Siena (53903 inhabitants)
51 Km SE of Livorno (159219 inhabitants)
58 Km SE of Pisa (89158 inhabitants)
59 Km SW of Scandicci (50609 inhabitants)
63 Km SW of Firenze (382808 inhabitants)
64 Km NW of Grosseto (82087 inhabitants)
67 Km SE of Lucca (89046 inhabitants)
69 Km SW of Prato (191150 inhabitants)
71 Km S of Pistoia (90315 inhabitants)
79 Km SE of Viareggio (62467 inhabitants)
87 Km W of Arezzo (99543 inhabitants)
99 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
Bulletin
Rev1000 		ML 1.0 2020-01-15
01:36:15		 43.2962 10.8287 5 2020-07-18
21:08:29		 Bollettino Sismico Italiano INGV 77700791
Reviewed
Rev100 		ML 1.0 2020-01-15
01:36:15		 43.2888 10.8247 7 2020-01-15
01:42:35		 Sala Sismica INGV-Roma 75550801
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-01-15 01:36:15 ± 0.11
Latitude 43.2962 ± 0.0063
Longitude 10.8287 ± 0.0062
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 77700791

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 693
Semi-minor axis of confidence ellipse (meter) 191
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 338
Circular confidence region, given by single value of horizontal uncertainty (meter) 690.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 112
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) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.71136
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 77700791
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-03-30 13:01:37

ML:1.0

Field Value
Value 1.0
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 75550801
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-01-15 01:42:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CELB.HHZ. 2020-01-15T01:36:30.06 0.1 undecidable manual P 220 78.9654 50 -0.12 91
TV.SF04.EHZ. 2020-01-15T01:36:30.25 3.0 positive manual P 0 0
IV.OSSC.HNZ. 2020-01-15T01:36:30.67 0.3 undecidable manual S 53 42.0246 96 0.22 72
IV.CSNT.HHZ. 2020-01-15T01:36:29.91 0.3 undecidable manual S 62 42.0246 96 -0.55 66
IV.CRMI.HNE. 2020-01-15T01:36:26.73 0.3 undecidable manual P 12 56.6988 50 -0.03 73
IV.FROS.CHZ. 2020-01-15T01:36:25.51 0.3 undecidable manual S 110 28.1496 99 -0.17 74
IV.OSSC.HNZ. 2020-01-15T01:36:24.28 0.3 undecidable manual P 53 42.0246 96 0.04 74
IV.CSNT.HHZ. 2020-01-15T01:36:24.25 0.3 undecidable manual P 62 42.0246 96 0 75
IV.TRIF.CHZ. 2020-01-15T01:36:22.94 0.3 undecidable manual S 163 20.9679 102 -0.3 73
IV.FROS.CHZ. 2020-01-15T01:36:21.86 0.1 undecidable manual P 110 28.1496 99 0.37 95
IV.TRIF.CHZ. 2020-01-15T01:36:20.49 0.3 undecidable manual P 163 20.9679 102 0.41 71
IV.MAGO.CHZ. 2020-01-15T01:36:20.66 0.1 undecidable manual S 260 13.9749 108 -0.24 100
IV.MAGO.CHZ. 2020-01-15T01:36:18.98 0.1 positive manual P 260 13.9749 108 0.25 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MAGO.CHN. ML:1.2 0.00020250000000000002 0.98 AML other m 2020-01-15T01:36:21.89
IV.MAGO.CHE. ML:1.3 0.000262 0.1 AML other m 2020-01-15T01:36:22.63
IV.TRIF.CHN. ML:0.9 0.0000665 1.46 AML other m 2020-01-15T01:36:24.15
IV.TRIF.CHE. ML:1.0 0.0000784 0.6 AML other m 2020-01-15T01:36:24.61
IV.FROS.CHE. ML:0.8 0.000034005 0.92 AML other m 2020-01-15T01:36:27.87
IV.FROS.CHN. ML:0.8 0.000037000000000000005 0.42 AML other m 2020-01-15T01:36:34.59
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