Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 02-07-2021 and time 12:01:21 (Italy) in region 3 km NE Lucca (LU)

A magnitude ML 1.0 earthquake occured in region: 3 km NE Lucca (LU), on

  • 02-07-2021 10:01:21 (UTC)
  • 02-07-2021 12:01:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.8680, 10.5320 at 8 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
Lucca LU 4 89046 89046
Capannori LU 4 46252 135298
Porcari LU 8 8845 144143
Montecarlo LU 11 4428 148571
Villa Basilica LU 11 1633 150204
Borgo a Mozzano LU 12 6994 157198
Altopascio LU 13 15481 172679
Pescia PT 13 19644 192323
San Giuliano Terme PI 14 31399 223722
Uzzano PT 14 5770 229492
Pescaglia LU 15 3526 233018
Vecchiano PI 15 12189 245207
Massarosa LU 15 22471 267678
Chiesina Uzzanese PT 15 4552 272230
Calci PI 16 6426 278656
Buggiano PT 16 8825 287481
Buti PI 16 5791 293272
Bagni di Lucca LU 17 6161 299433
Ponte Buggianese PT 18 8804 308237
Massa e Cozzile PT 18 7983 316220
Bientina PI 19 8062 324282
Vicopisano PI 19 8559 332841
Montecatini-Terme PT 19 20409 353250
Pisa PI 20 89158 442408
Camaiore LU 20 32513 474921

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km NE of Lucca (89046 inhabitants)
20 Km NE of Pisa (89158 inhabitants)
23 Km E of Viareggio (62467 inhabitants)
32 Km W of Pistoia (90315 inhabitants)
36 Km SE of Massa (69479 inhabitants)
39 Km NE of Livorno (159219 inhabitants)
42 Km SE of Carrara (63133 inhabitants)
45 Km W of Prato (191150 inhabitants)
54 Km W of Scandicci (50609 inhabitants)
59 Km W of Firenze (382808 inhabitants)
62 Km E of La Spezia (93959 inhabitants)
89 Km NW of Siena (53903 inhabitants)
92 Km SW of Modena (184973 inhabitants)
93 Km S of Reggio nell'Emilia (171345 inhabitants)
95 Km SW of Bologna (386663 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 2021-07-02
10:01:21		 43.8682 10.5323 8 2021-12-29
11:12:15		 Bollettino Sismico Italiano INGV 93266301
Reviewed
Rev100 		ML 1.0 2021-07-02
10:01:21		 43.864 10.5203 8 2021-07-02
10:05:06		 Sala Sismica INGV-Roma 92145961
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-02 10:01:21 ± 0.1
Latitude 43.8682 ± 0.0045
Longitude 10.5323 ± 0.0162
Depth (km) 8 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 93266301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1340
Semi-minor axis of confidence ellipse (meter) 460
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 270
Circular confidence region, given by single value of horizontal uncertainty (meter) 1340.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 145
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.05396
Epicentral distance of station farthest from the epicenter (degree) 0.23922
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 93266301
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-07-27 10:52:09

ML:1.0

Field Value
Value 1.0
Uncertainty 0.1
Num. used stations 2
Type of magnitude ML
Reference to an origin 92145961
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-02 10:05:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BDI.HNZ. 2021-07-02T10:01:29.32 0.6 undecidable manual S 13 22.1556 110 -0.22 48
GU.CARD.HHZ. 2021-07-02T10:01:27.97 0.3 undecidable manual S 347 17.9709 114 -0.22 72
GU.POPM.HHZ. 2021-07-02T10:01:27.20 0.3 undecidable manual P 42 26.5512 107 0.28 70
IV.PII.HHZ. 2021-07-02T10:01:27.31 0.1 undecidable manual S 182 16.2726 116 -0.33 94
IV.PII.HHZ. 2021-07-02T10:01:25.27 0.1 undecidable manual P 182 16.2726 116 0.28 95
IV.BDI.HNZ. 2021-07-02T10:01:25.93 0.1 undecidable manual P 13 22.1556 110 -0.16 97
GU.CARD.HHZ. 2021-07-02T10:01:25.31 0.3 undecidable manual P 347 17.9709 114 0 75
GU.MAIM.HHZ. 2021-07-02T10:01:24.94 0.1 undecidable manual S 327 5.994 143 0.12 100
GU.MAIM.HHZ. 2021-07-02T10:01:23.68 0.6 undecidable manual P 327 5.994 143 0.32 48
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PII.HHE. ML:1.1 0.000112 0.32 AML other m 2021-07-02T10:01:27.57
IV.PII.HHN. ML:1.0 0.00008715 0.56 AML other m 2021-07-02T10:01:28.36
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