Earthquake with magnitude of ML 0.9 on date 17-10-2021 and time 03:23:28 (Italy) in region 7 km NE Fosciandora (LU)

A magnitude ML 0.9 earthquake occured in region: 7 km NE Fosciandora (LU), on

  • 17-10-2021 01:23:28 (UTC)
  • 17-10-2021 03:23:28 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 44.164, 10.514 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
Fosciandora LU 7 602 602
Castiglione di Garfagnana LU 8 1818 2420
Pieve Fosciana LU 9 2414 4834
Villa Collemandina LU 9 1334 6168
Pievepelago MO 10 2222 8390
Castelnuovo di Garfagnana LU 10 5950 14340
Barga LU 10 10034 24374
Fiumalbo MO 11 1280 25654
Coreglia Antelminelli LU 11 5215 30869
Abetone PT 12 621 31490
Molazzana LU 13 1043 32533
Gallicano LU 13 3807 36340
San Romano in Garfagnana LU 13 1410 37750
Riolunato MO 13 712 38462
Camporgiano LU 14 2176 40638
Frassinoro MO 15 1926 42564
Careggine LU 16 564 43128
Fabbriche di Vergemoli LU 16 768 43896
Piazza al Serchio LU 17 2367 46263
Bagni di Lucca LU 18 6161 52424
Sillano Giuncugnano LU 18 1085 53509
Montecreto MO 19 940 54449
Vagli Sotto LU 19 939 55388

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km E of Massa (69479 inhabitants)
35 Km E of Carrara (63133 inhabitants)
36 Km N of Lucca (89046 inhabitants)
39 Km NE of Viareggio (62467 inhabitants)
41 Km NW of Pistoia (90315 inhabitants)
51 Km N of Pisa (89158 inhabitants)
55 Km E of La Spezia (93959 inhabitants)
56 Km NW of Prato (191150 inhabitants)
60 Km S of Reggio nell'Emilia (171345 inhabitants)
63 Km SW of Modena (184973 inhabitants)
70 Km N of Livorno (159219 inhabitants)
70 Km NW of Scandicci (50609 inhabitants)
72 Km S of Parma (192836 inhabitants)
74 Km NW of Firenze (382808 inhabitants)
75 Km SW of Carpi (70699 inhabitants)
76 Km W of Bologna (386663 inhabitants)
98 Km W of Imola (69797 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 0.9 2021-10-17
01:23:28
44.1643 10.5142 10 2021-10-17
01:30:55
Sala Sismica INGV-Roma 96666371
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-10-17 01:23:28 ± 0.1
Latitude 44.1643 ± 0.0036
Longitude 10.5142 ± 0.0063
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 96666371

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 454
Semi-minor axis of confidence ellipse (meter) 242
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 68
Circular confidence region, given by single value of horizontal uncertainty (meter) 450
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.08364
Epicentral distance of station farthest from the epicenter (degree) 0.44247
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 96666371
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-10-17 01:30:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
GU.POPM.HHZ. 2021-10-17T01:23:37.10 0.6 undecidable manual S 124 0.2113 114 0 49
IV.PII.HHZ. 2021-10-17T01:23:37.12 0.6 undecidable manual P 179 0.4425 50 -0.19 45
GU.GSCL.HHZ. 2021-10-17T01:23:36.05 0.6 undecidable manual S 16 0.1934 116 -0.43 45
IV.BDI.HHZ. 2021-10-17T01:23:34.12 0.3 undecidable manual S 150 0.1169 128 0.15 73
GU.CARD.HHZ. 2021-10-17T01:23:34.38 0.3 undecidable manual S 189 0.1403 123 -0.3 71
GU.MAIM.HHZ. 2021-10-17T01:23:34.18 0.6 undecidable manual P 184 0.2518 50 0.14 48
GU.GSCL.HHZ. 2021-10-17T01:23:33.13 0.1 positive manual P 16 0.1934 116 0.14 96
GU.POPM.HHZ. 2021-10-17T01:23:33.33 0.1 negative manual P 124 0.2113 114 -0.01 99
GU.SARM.EHZ. 2021-10-17T01:23:33.09 0.3 undecidable manual S 284 0.0836 138 0.07 75
IV.BDI.HHZ. 2021-10-17T01:23:31.71 0.6 undecidable manual P 150 0.1169 128 0.17 49
GU.CARD.HHZ. 2021-10-17T01:23:31.94 0.1 undecidable manual P 189 0.1403 123 -0.01 100
GU.SARM.EHZ. 2021-10-17T01:23:31.07 0.3 undecidable manual P 284 0.0836 138 0.08 75
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BDI.HHN. ML:1 0.00011377495 0.2 AML other m 2021-10-17T01:23:34.62
IV.BDI.HHE. ML:0.8 6.247134E-5 0.1 AML other m 2021-10-17T01:23:34.64
GU.CARD.HHN. ML:1.2 0.00015570005 0.08 AML other m 2021-10-17T01:23:34.93
GU.CARD.HHE. ML:1.5 0.0002745 0.58 AML other m 2021-10-17T01:23:34.97
GU.GSCL.HHE. ML:0.9 5.05E-5 0.2 AML other m 2021-10-17T01:23:36.54
GU.GSCL.HHN. ML:0.7 3.5841416E-5 0.18 AML other m 2021-10-17T01:23:36.88
GU.POPM.HHN. ML:0.9 5.225E-5 1.3 AML other m 2021-10-17T01:23:37.75
GU.POPM.HHE. ML:0.9 4.54E-5 0.18 AML other m 2021-10-17T01:23:37.34
IV.BDI.HNE. ML:1 0.000112115635 0.8904 AML other m 2021-10-17T01:23:37.52
IV.BDI.HNN. ML:1.1 0.00012196794 0.2408 AML other m 2021-10-17T01:23:34.61
GU.MAIM.HHE. ML:0.3 1.1124651E-5 0.3 AML other m 2021-10-17T01:23:38.17
GU.MAIM.HHN. ML:0.7 2.277043E-5 0.18 AML other m 2021-10-17T01:23:38.01
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