Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 16-09-2020 and time 20:03:05 (UTC) in region 4 km N Buti (PI)

A magnitude ML 1.5 earthquake occured in region: 4 km N Buti (PI), on

  • 16-09-2020 20:03:05 (UTC)
  • 16-09-2020 22:03:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.7620, 10.5840 at 10 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
Buti PI 4 5791 5791
Bientina PI 6 8062 13853
Calci PI 7 6426 20279
Vicopisano PI 7 8559 28838
Calcinaia PI 9 12439 41277
Porcari LU 9 8845 50122
Altopascio LU 10 15481 65603
Cascina PI 10 45257 110860
Capannori LU 10 46252 157112
Santa Maria a Monte PI 11 13253 170365
San Giuliano Terme PI 11 31399 201764
Lucca LU 11 89046 290810
Pontedera PI 12 29223 320033
Montecarlo LU 12 4428 324461
Chiesina Uzzanese PT 14 4552 329013
Castelfranco di Sotto PI 15 13427 342440
Pisa PI 16 89158 431598
Ponte Buggianese PT 16 8804 440402
Vecchiano PI 16 12189 452591
Ponsacco PI 16 15611 468202
Santa Croce sull'Arno PI 17 14601 482803
Uzzano PT 17 5770 488573
Montopoli in Val d'Arno PI 18 11148 499721
Buggiano PT 18 8825 508546
Pescia PT 18 19644 528190
Fucecchio FI 19 23618 551808
Villa Basilica LU 19 1633 553441

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km SE of Lucca (89046 inhabitants)
16 Km E of Pisa (89158 inhabitants)
29 Km E of Viareggio (62467 inhabitants)
32 Km NE of Livorno (159219 inhabitants)
33 Km SW of Pistoia (90315 inhabitants)
43 Km W of Prato (191150 inhabitants)
47 Km SE of Massa (69479 inhabitants)
48 Km W of Scandicci (50609 inhabitants)
53 Km SE of Carrara (63133 inhabitants)
54 Km W of Firenze (382808 inhabitants)
72 Km SE of La Spezia (93959 inhabitants)
78 Km NW of Siena (53903 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 1.5 2020-09-16
20:03:05		 43.7615 10.5843 10 2021-02-26
14:55:57		 Bollettino Sismico Italiano INGV 83409951
Reviewed
Rev100 		ML 1.6 2020-09-16
20:03:05		 43.7568 10.5827 10 2020-09-16
20:12:38		 Sala Sismica INGV-Roma 82961891
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-16 20:03:05 ± 0.1
Latitude 43.7615 ± 0.0054
Longitude 10.5843 ± 0.0075
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 83409951

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 688
Semi-minor axis of confidence ellipse (meter) 497
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 228
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) 72
Number of associated phases, regardless of their use for origin computation 42
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.81838
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 32
Type of magnitude ML
Reference to an origin 82961891
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-16 20:12:38

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 83409951
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-01 09:08:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.TRAV.HHZ. 2020-09-16T20:04:26.10 3.0 undecidable manual Sn 3.43 0
IV.VARE.HHZ. 2020-09-16T20:04:25.42 3.0 undecidable manual Sg 8.15 0
IV.LAV9.HNZ. 2020-09-16T20:04:18.09 3.0 undecidable manual Sn -3.3 0
IV.SRES.HHZ. 2020-09-16T20:04:09.17 3.0 undecidable manual Sn 0.67 0
GU.MGRO.HHZ. 2020-09-16T20:04:07.83 3.0 undecidable manual Sn 0.43 0
IV.NDIM.HNZ. 2020-09-16T20:03:44.11 3.0 undecidable manual S -0.34 0
GU.MGRO.HHZ. 2020-09-16T20:03:42.35 3.0 undecidable manual Pn 1.95 0
IV.MBAL.EHZ. 2020-09-16T20:03:39.48 3.0 undecidable manual Pn 1 0
IV.PLMA.HHZ. 2020-09-16T20:03:26.24 0.6 undecidable manual S 299 66.5778 50 0.62 39
IV.CRE.HHZ. 2020-09-16T20:03:25.12 3.0 undecidable manual P -0.36 0
GU.GSCL.HHZ. 2020-09-16T20:03:25.75 0.6 undecidable manual S 0 65.3901 50 0.46 42
IV.MOCL.EHZ. 2020-09-16T20:03:22.33 0.6 undecidable manual S 60 54.8007 50 -0.16 45
GU.EQUI.HHN. 2020-09-16T20:03:22.58 0.3 undecidable manual S 323 56.5989 50 -0.38 65
GU.GRAM.HHZ. 2020-09-16T20:03:21.51 1.0 undecidable manual P 333 90.8424 50 0.84 17
IV.MAGO.CHZ. 2020-09-16T20:03:21.51 0.6 undecidable manual S 174 54.501 50 -0.89 36
GU.SARM.EHZ. 2020-09-16T20:03:21.03 0.3 undecidable manual S 343 49.1175 50 0.07 70
MN.VLC.HHZ. 2020-09-16T20:03:20.46 0.3 undecidable manual S 340 46.9197 50 0.09 70
IV.MPPT.EHZ. 2020-09-16T20:03:19.92 0.3 undecidable manual S 62 45.9207 50 -0.2 69
IV.RONT.HHZ. 2020-09-16T20:03:18.16 0.6 undecidable manual P 69 72.5718 50 0.31 43
IV.PLMA.HHZ. 2020-09-16T20:03:17.39 0.3 undecidable manual P 299 66.5778 50 0.46 62
IV.SEI.HHZ. 2020-09-16T20:03:17.99 0.3 undecidable manual P 62 69.8745 50 0.56 60
IV.CSNT.HHZ. 2020-09-16T20:03:17.04 0.3 undecidable manual P 119 65.0904 50 0.34 64
GU.GSCL.HHZ. 2020-09-16T20:03:17.09 0.6 undecidable manual P 0 65.3901 50 0.36 43
GU.POPM.HHZ. 2020-09-16T20:03:16.59 0.3 undecidable manual S 24 34.3434 50 -0.43 67
IV.FNVD.HHZ. 2020-09-16T20:03:16.81 0.3 undecidable manual P 43 62.2932 50 0.55 61
IV.BDI.HHZ. 2020-09-16T20:03:16.31 0.3 undecidable manual S 2 33.4443 50 -0.47 66
IV.MAGO.CHZ. 2020-09-16T20:03:15.18 0.3 undecidable manual P 174 54.501 50 0.12 69
GU.CARD.HHZ. 2020-09-16T20:03:15.37 0.3 undecidable manual S 344 30.4473 50 -0.62 63
IV.MOCL.EHZ. 2020-09-16T20:03:15.25 0.3 undecidable manual P 60 54.8007 50 0.14 68
IV.CRMI.HHZ. 2020-09-16T20:03:15.75 0.6 undecidable manual S 83 31.8459 50 -0.62 42
MN.VLC.HHZ. 2020-09-16T20:03:14.04 0.3 undecidable manual P 340 46.9197 50 0.15 69
GU.SARM.EHZ. 2020-09-16T20:03:14.68 0.6 undecidable manual P 343 49.1175 50 0.45 43
GU.EQUI.HHN. 2020-09-16T20:03:14.98 0.3 undecidable manual P 323 56.5989 50 -0.41 64
IV.MPPT.EHZ. 2020-09-16T20:03:13.76 0.3 undecidable manual P 62 45.9207 50 0.01 71
GU.POPM.HHZ. 2020-09-16T20:03:12.00 0.1 undecidable manual P 24 34.3434 50 0.04 96
IV.CRMI.HHZ. 2020-09-16T20:03:11.51 0.1 undecidable manual P 83 31.8459 50 -0.07 96
IV.BDI.HHZ. 2020-09-16T20:03:11.80 0.1 undecidable manual P 2 33.4443 50 -0.02 97
GU.MAIM.HHZ. 2020-09-16T20:03:11.96 0.3 undecidable manual S 336 18.4704 117 -0.29 71
GU.CARD.HHZ. 2020-09-16T20:03:11.28 0.1 undecidable manual P 344 30.4473 50 -0.08 96
GU.MAIM.HHZ. 2020-09-16T20:03:09.46 0.1 undecidable manual P 336 18.4704 117 0.26 95
IV.PII.HHZ. 2020-09-16T20:03:08.43 0.3 undecidable manual S 227 6.4935 146 -0.59 67
IV.PII.HHZ. 2020-09-16T20:03:07.43 0.1 undecidable manual P 227 6.4935 146 0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.POPM.HHE. ML:1.8 0.000264 0.74 AML other m 2020-09-16T20:03:17.01
GU.POPM.HHN. ML:1.8 0.0002635 1.8 AML other m 2020-09-16T20:03:17.02
IV.BDI.HHE. ML:1.3 0.00008199999999999999 0.34 AML other m 2020-09-16T20:03:17.08
IV.BDI.HHN. ML:1.4 0.00009775 0.64 AML other m 2020-09-16T20:03:17.67
IV.MPPT.EHE. ML:1.4 0.00006895 1.2 AML other m 2020-09-16T20:03:20.02
MN.VLC.HHE. ML:1.5 0.00009715 0.78 AML other m 2020-09-16T20:03:20.65
MN.VLC.HHN. ML:1.5 0.00008785 0.14 AML other m 2020-09-16T20:03:21.32
IV.MPPT.EHN. ML:1.1 0.000040668090000000004 0.2048 AML other m 2020-09-16T20:03:22.14
IV.MOCL.EHE. ML:1.5 0.00008230000000000001 1.36 AML other m 2020-09-16T20:03:26.17
GU.GSCL.HHN. ML:1.6 0.00007780000000000001 0.18 AML other m 2020-09-16T20:03:26.64
IV.MOCL.EHN. ML:1.5 0.00008075 0.54 AML other m 2020-09-16T20:03:26.73
IV.PLMA.HHN. ML:1.6 0.0000769 0.38 AML other m 2020-09-16T20:03:28.68
IV.FNVD.HHE. ML:1.2 0.00003735 0.82 AML other m 2020-09-16T20:03:28.99
IV.PLMA.HHE. ML:1.4 0.0000427 0.72 AML other m 2020-09-16T20:03:29.25
GU.GSCL.HHE. ML:1.6 0.00006470000000000001 0.2 AML other m 2020-09-16T20:03:29.49
IV.FNVD.HHN. ML:1.4 0.0000487 0.58 AML other m 2020-09-16T20:03:29.83
IV.SEI.HHE. ML:1.5 0.00005725 1.5 AML other m 2020-09-16T20:03:32.79
IV.SEI.HHN. ML:1.6 0.00007475 0.38 AML other m 2020-09-16T20:03:33.37
IV.CRE.HHN. ML:1.4 0.00002165 0.68 AML other m 2020-09-16T20:03:39.40
IV.CRE.HHE. ML:1.4 0.00002005 0.74 AML other m 2020-09-16T20:03:39.92
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