Earthquake with magnitude of ML 0.8 on date 27-09-2020 and time 21:12:21 (UTC) in region 7 km W Lucca (LU)

A magnitude ML 0.8 earthquake occured in region: 7 km W Lucca (LU), on

  • 27-09-2020 21:12:21 (UTC)
  • 27-09-2020 23:12:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.84, 10.42 at 10 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.

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 7 89046 89046
Vecchiano PI 7 12189 101235
Massarosa LU 7 22471 123706
San Giuliano Terme PI 8 31399 155105
Capannori LU 13 46252 201357
Pisa PI 14 89158 290515
Viareggio LU 14 62467 352982
Calci PI 15 6426 359408
Pescaglia LU 15 3526 362934
Camaiore LU 15 32513 395447
Porcari LU 16 8845 404292
Buti PI 18 5791 410083
Borgo a Mozzano LU 19 6994 417077

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km W of Lucca (89046 inhabitants)
14 Km N of Pisa (89158 inhabitants)
14 Km E of Viareggio (62467 inhabitants)
32 Km SE of Massa (69479 inhabitants)
33 Km N of Livorno (159219 inhabitants)
37 Km SE of Carrara (63133 inhabitants)
41 Km W of Pistoia (90315 inhabitants)
55 Km W of Prato (191150 inhabitants)
56 Km SE of La Spezia (93959 inhabitants)
62 Km W of Scandicci (50609 inhabitants)
68 Km W of Firenze (382808 inhabitants)
93 Km NW of Siena (53903 inhabitants)
97 Km S of Reggio nell'Emilia (171345 inhabitants)
99 Km SW of Modena (184973 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.8 2020-09-27
21:12:21
43.84 10.42 10 2020-09-27
21:19:06
Sala Sismica INGV-Roma 83315091
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-09-27 21:12:21 ± 0.17
Latitude 43.84 ± 0.01
Longitude 10.42 ± 0.02
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 83315091

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1387
Semi-minor axis of confidence ellipse (meter) 591
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 83
Circular confidence region, given by single value of horizontal uncertainty (meter) 1390
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 183
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 14
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
Epicentral distance of station farthest from the epicenter (degree) 0.38041
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.8

Field Value
Value 0.8
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 83315091
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-09-27 21:19:06
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
OE.WTTA.HHZ. 2020-09-27T21:13:53.38 3.0 undecidable manual Sn -7.23 0
IX.SFL3.HNZ.01 2020-09-27T21:13:42.57 3.0 undecidable manual Pn 6.88 0
IV.MCEL.HHZ. 2020-09-27T21:13:42.27 3.0 negative manual Pn 0.56 0
IV.SGO.HHZ. 2020-09-27T21:13:39.60 3.0 undecidable manual Pn 3.88 0
IV.MSAG.HHZ. 2020-09-27T21:13:38.00 3.0 undecidable manual Pn 6.85 0
IV.MCRV.HHZ. 2020-09-27T21:13:35.92 3.0 undecidable manual Pn 3.36 0
IV.TERO.HHZ. 2020-09-27T21:13:13.69 3.0 undecidable manual Pg 9.2 0
IV.SARZ.HHZ. 2020-09-27T21:13:12.52 3.0 undecidable manual S 0.19 0
IV.MBAL.EHZ. 2020-09-27T21:12:54.43 3.0 positive manual Pn -0.44 0
IV.FIR.HHZ. 2020-09-27T21:12:43.19 3.0 undecidable manual S -0.22 0
GU.SARM.EHE. 2020-09-27T21:12:34.54 0.6 undecidable manual S 358 0.3462 50 0.3 47
GU.POPM.HHZ. 2020-09-27T21:12:33.35 0.3 undecidable manual S 49 0.3184 50 -0.05 74
IV.BDI.HHZ. 2020-09-27T21:12:31.32 0.3 undecidable manual S 29 0.2581 50 -0.28 71
GU.EQUI.HHE. 2020-09-27T21:12:28.64 0.3 undecidable manual P 330 0.3804 50 -0.66 62
GU.POPM.HHZ. 2020-09-27T21:12:28.68 0.6 undecidable manual P 49 0.3184 50 0.44 46
MN.VLC.HHZ. 2020-09-27T21:12:28.63 0.6 positive manual P 356 0.3229 50 0.32 47
GU.SARM.EHE. 2020-09-27T21:12:28.83 0.3 undecidable manual P 358 0.3462 50 0.11 73
GU.CARD.HHZ. 2020-09-27T21:12:28.98 0.3 undecidable manual S 13 0.1934 114 -0.38 71
IV.BDI.HHZ. 2020-09-27T21:12:27.20 0.3 undecidable manual P 29 0.2581 50 0 76
IV.PII.HHZ. 2020-09-27T21:12:27.09 0.3 undecidable manual S 147 0.1376 122 -0.36 72
GU.CARD.HHZ. 2020-09-27T21:12:26.05 0.1 negative manual P 13 0.1934 114 0.14 99
GU.MAIM.HHZ. 2020-09-27T21:12:25.99 0.3 undecidable manual S 33 0.0917 133 -0.06 77
GU.MAIM.HHZ. 2020-09-27T21:12:24.37 0.1 undecidable manual P 33 0.0917 133 0.37 97
IV.PII.HHZ. 2020-09-27T21:12:24.97 0.1 undecidable manual P 147 0.1376 122 0.16 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PII.HHN. ML:0.8 6.695E-5 0.44 AML other m 2020-09-27T21:12:27.88
IV.PII.HHE. ML:1 0.00010065 0.58 AML other m 2020-09-27T21:12:27.89
IV.MBAL.EHN. ML:2.1 3.655E-5 0.54 AML other m 2020-09-27T21:13:23.17
IV.MBAL.EHE. ML:2.3 6.18E-5 0.06 AML other m 2020-09-27T21:13:41.45
GU.CARD.HHE. ML:1 6.89057E-5 0.1024 AML other m 2020-09-27T21:12:29.80
GU.CARD.HHN. ML:1.2 0.00011494915 0.1408 AML other m 2020-09-27T21:12:29.95
IV.BDI.HHE. ML:0.6 1.92912865E-5 0.2816 AML other m 2020-09-27T21:12:32.41
IV.BDI.HHN. ML:0.6 2.23360765E-5 0.4352 AML other m 2020-09-27T21:12:31.45
GU.POPM.HHE. ML:0.7 2.246148E-5 0.1408 AML other m 2020-09-27T21:12:34.55
GU.POPM.HHN. ML:0.7 2.1836025E-5 0.1792 AML other m 2020-09-27T21:12:33.86
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download