Earthquake with magnitude of ML 0.2 on date 09-09-2021 and time 03:22:55 (Italy) in region 4 km SW Borgo a Mozzano (LU)

A magnitude ML 0.2 earthquake occured in region: 4 km SW Borgo a Mozzano (LU), on

  • 09-09-2021 01:22:55 (UTC)
  • 09-09-2021 03:22:55 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.951, 10.526 at 5 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
Borgo a Mozzano LU 4 6994 6994
Bagni di Lucca LU 9 6161 13155
Pescaglia LU 9 3526 16681
Villa Basilica LU 10 1633 18314
Lucca LU 12 89046 107360
Capannori LU 12 46252 153612
Coreglia Antelminelli LU 13 5215 158827
Pescia PT 14 19644 178471
Barga LU 14 10034 188505
Gallicano LU 14 3807 192312
Porcari LU 14 8845 201157
Montecarlo LU 16 4428 205585
Molazzana LU 16 1043 206628
Fabbriche di Vergemoli LU 16 768 207396
Uzzano PT 17 5770 213166
Massarosa LU 17 22471 235637
Camaiore LU 18 32513 268150
Buggiano PT 18 8825 276975
Massa e Cozzile PT 18 7983 284958
Stazzema LU 19 3193 288151
Altopascio LU 19 15481 303632
Fosciandora LU 19 602 304234
Marliana PT 20 3210 307444
Chiesina Uzzanese PT 20 4552 311996
Castelnuovo di Garfagnana LU 20 5950 317946

Municipalities with at least 50000 inhabitants

An earthquake occurred to
12 Km N of Lucca (89046 inhabitants)
24 Km E of Viareggio (62467 inhabitants)
28 Km NE of Pisa (89158 inhabitants)
32 Km W of Pistoia (90315 inhabitants)
32 Km E of Massa (69479 inhabitants)
37 Km E of Carrara (63133 inhabitants)
47 Km W of Prato (191150 inhabitants)
48 Km NE of Livorno (159219 inhabitants)
57 Km W of Scandicci (50609 inhabitants)
58 Km E of La Spezia (93959 inhabitants)
62 Km W of Firenze (382808 inhabitants)
84 Km S of Reggio nell'Emilia (171345 inhabitants)
84 Km SW of Modena (184973 inhabitants)
89 Km SW of Bologna (386663 inhabitants)
96 Km NW of Siena (53903 inhabitants)
96 Km S of Parma (192836 inhabitants)
97 Km SW of Carpi (70699 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web 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 0.2 2021-09-09
01:22:55
43.9507 10.5258 5 2021-09-09
01:26:49
Sala Sismica INGV-Roma 95213641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-09 01:22:55 ± 0.26
Latitude 43.9507 ± 0.0054
Longitude 10.5258 ± 0.0125
Depth (km) 5 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95213641

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 727
Semi-minor axis of confidence ellipse (meter) 713
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 124
Circular confidence region, given by single value of horizontal uncertainty (meter) 730
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 124
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) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.04497
Epicentral distance of station farthest from the epicenter (degree) 0.22843
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

ML:0.2

Field Value
Value 0.2
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 95213641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-09 01:26:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.POPM.HHZ. 2021-09-09T01:23:03.42 0.6 undecidable manual S 60 0.1907 103 0.04 51
IV.BDI.HHZ. 2021-09-09T01:23:00.51 0.6 undecidable manual S 24 0.1232 110 -0.35 48
GU.POPM.HHZ. 2021-09-09T01:23:00.31 0.1 undecidable manual P 60 0.1907 103 0.12 100
IV.PII.HHZ. 2021-09-09T01:23:00.59 0.6 undecidable manual P 180 0.2284 101 -0.42 47
IV.BDI.HHZ. 2021-09-09T01:22:59.01 1.0 positive manual P 24 0.1232 110 0.27 25
GU.CARD.HHZ. 2021-09-09T01:22:59.32 0.6 undecidable manual S 337 0.0818 118 -0.09 51
GU.CARD.HHZ. 2021-09-09T01:22:58.05 0.6 undecidable manual P 337 0.0818 118 0.15 51
GU.MAIM.HHZ. 2021-09-09T01:22:58.22 0.6 undecidable manual S 213 0.045 134 -0.04 52
GU.MAIM.HHZ. 2021-09-09T01:22:57.43 0.3 negative manual P 213 0.045 134 0.2 76
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
GU.MAIM.HHE. ML:0 6.85E-5 0.1 AML other m 2021-09-09T01:22:58.50
GU.MAIM.HHN. ML:0 0.000103 0.6 AML other m 2021-09-09T01:22:58.51
GU.CARD.HHN. ML:0.3 3.77E-5 0.54 AML other m 2021-09-09T01:22:59.52
GU.CARD.HHE. ML:0.2 2.97E-5 0.38 AML other m 2021-09-09T01:23:00.06
IV.BDI.HHE. ML:0.1 1.28E-5 0.44 AML other m 2021-09-09T01:23:01.15
IV.BDI.HHN. ML:0.1 1.32E-5 1.32 AML other m 2021-09-09T01:23:01.85
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