Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 20-12-2020 and time 05:38:47 (Italy) in region 1 km W Minucciano (LU)

A magnitude ML 1.1 earthquake occured in region: 1 km W Minucciano (LU), on

  • 20-12-2020 04:38:47 (UTC)
  • 20-12-2020 05:38:47 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.1720, 10.2000 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
Minucciano LU 1 2102 2102
Casola in Lunigiana MS 4 988 3090
Piazza al Serchio LU 8 2367 5457
Vagli Sotto LU 9 939 6396
Fivizzano MS 10 7925 14321
Sillano Giuncugnano LU 10 1085 15406
Camporgiano LU 11 2176 17582
Careggine LU 12 564 18146
San Romano in Garfagnana LU 12 1410 19556
Carrara MS 13 63133 82689
Fosdinovo MS 15 4883 87572
Comano MS 15 714 88286
Massa MS 16 69479 157765
Ortonovo SP 16 8277 166042
Villa Collemandina LU 16 1334 167376
Licciana Nardi MS 17 4949 172325
Castelnuovo Magra SP 17 8415 180740
Castiglione di Garfagnana LU 17 1818 182558
Montignoso MS 17 10323 192881
Pieve Fosciana LU 18 2414 195295
Castelnuovo di Garfagnana LU 18 5950 201245
Aulla MS 19 11263 212508
Seravezza LU 20 13073 225581
Fabbriche di Vergemoli LU 20 768 226349

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km NE of Carrara (63133 inhabitants)
16 Km NE of Massa (69479 inhabitants)
30 Km E of La Spezia (93959 inhabitants)
34 Km N of Viareggio (62467 inhabitants)
44 Km NW of Lucca (89046 inhabitants)
53 Km NW of Pisa (89158 inhabitants)
63 Km W of Pistoia (90315 inhabitants)
68 Km SW of Reggio nell'Emilia (171345 inhabitants)
69 Km N of Livorno (159219 inhabitants)
71 Km S of Parma (192836 inhabitants)
78 Km SW of Modena (184973 inhabitants)
79 Km W of Prato (191150 inhabitants)
87 Km SW of Carpi (70699 inhabitants)
91 Km NW of Scandicci (50609 inhabitants)
96 Km W of Firenze (382808 inhabitants)
98 Km W 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 1.1 2020-12-20
04:38:47		 44.1717 10.1997 8 2021-02-26
14:56:17		 Bollettino Sismico Italiano INGV 86771321
Reviewed
Rev100 		ML 1.1 2020-12-20
04:38:47		 44.1662 10.1937 7 2020-12-20
04:49:58		 Sala Sismica INGV-Roma 85567381
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-20 04:38:47 ± 0.09
Latitude 44.1717 ± 0.0072
Longitude 10.1997 ± 0.0063
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86771321

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 788
Semi-minor axis of confidence ellipse (meter) 245
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 21
Circular confidence region, given by single value of horizontal uncertainty (meter) 790.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 102
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
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) 0.03417
Epicentral distance of station farthest from the epicenter (degree) 0.50722
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 11
Type of magnitude ML
Reference to an origin 86771321
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-01 23:12:54

ML:1.1

Field Value
Value 1.1
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 85567381
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-20 04:49:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PII.HHZ. 2020-12-20T04:39:05.02 0.6 undecidable manual S 152 56.2992 50 -0.47 44
GU.POPM.HHZ. 2020-12-20T04:39:02.88 0.6 undecidable manual S 107 46.5201 50 -0.02 50
GU.GRAM.HHZ. 2020-12-20T04:39:00.43 0.6 undecidable manual S 343 36.9297 50 0.09 50
GU.MAIM.HHE. 2020-12-20T04:38:59.51 1.0 undecidable manual S 141 36.9297 50 -0.83 20
IV.PLMA.HHE. 2020-12-20T04:38:59.25 0.6 undecidable manual S 244 30.6471 104 0.97 38
IV.BDI.HHZ. 2020-12-20T04:38:59.02 0.6 undecidable manual S 111 33.744 103 -0.3 48
IV.PII.HHZ. 2020-12-20T04:38:58.09 0.3 undecidable manual P 152 56.2992 50 0.29 69
GU.CARD.HHZ. 2020-12-20T04:38:57.03 0.6 undecidable manual S 126 27.6501 106 -0.25 49
GU.POPM.HHZ. 2020-12-20T04:38:56.32 0.3 undecidable manual P 107 46.5201 50 0.01 75
GU.MAIM.HHE. 2020-12-20T04:38:54.51 0.3 undecidable manual P 141 36.9297 50 -0.31 71
GU.GRAM.HHZ. 2020-12-20T04:38:54.75 0.3 undecidable manual P 343 36.9297 50 -0.07 75
IV.PLMA.HHE. 2020-12-20T04:38:53.94 0.3 undecidable manual P 244 30.6471 104 0.3 72
GU.SARM.EHZ. 2020-12-20T04:38:53.65 0.6 undecidable manual S 85 16.0728 116 0.16 51
IV.BDI.HHZ. 2020-12-20T04:38:53.94 0.3 undecidable manual P 111 33.744 103 -0.3 72
GU.CARD.HHZ. 2020-12-20T04:38:53.30 0.3 undecidable manual P 126 27.6501 106 0.24 74
MN.VLC.HHZ. 2020-12-20T04:38:53.49 0.6 undecidable manual S 95 14.9739 118 0.35 49
MN.VLC.HHZ. 2020-12-20T04:38:51.05 0.1 negative manual P 95 14.9739 118 0.38 98
GU.SARM.EHZ. 2020-12-20T04:38:51.13 0.1 negative manual P 85 16.0728 116 0.26 100
GU.FIVI.HNZ. 2020-12-20T04:38:51.06 0.6 undecidable manual S 323 9.4794 129 -0.49 48
GU.FIVI.HNZ. 2020-12-20T04:38:49.67 0.3 undecidable manual P 323 9.4794 129 -0.08 79
GU.EQUI.HHZ. 2020-12-20T04:38:49.68 0.3 undecidable manual S 260 3.7962 154 -0.62 69
GU.EQUI.HHZ. 2020-12-20T04:38:48.98 0.3 undecidable manual P 260 3.7962 154 -0.05 80
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
MN.VLC.HHN. ML:0.8 0.00006375033 0.1408 AML other m 2020-12-20T04:38:53.80
GU.CARD.HHN. ML:1.0 0.000051387520000000004 0.1408 AML other m 2020-12-20T04:38:57.53
GU.CARD.HHE. ML:1.1 0.000071031595 0.16 AML other m 2020-12-20T04:38:57.61
IV.BDI.HHE. ML:0.8 0.000022851955 0.1184 AML other m 2020-12-20T04:38:59.39
IV.BDI.HHN. ML:0.8 0.000029064535000000002 0.1984 AML other m 2020-12-20T04:38:59.51
GU.GRAM.HHN. ML:1.2 0.000065268715 0.24 AML other m 2020-12-20T04:39:01.79
GU.GRAM.HHE. ML:1.3 0.00007237591000000001 0.3616 AML other m 2020-12-20T04:39:03.27
GU.POPM.HHE. ML:1.4 0.000062685635 0.1792 AML other m 2020-12-20T04:39:04.22
GU.POPM.HHN. ML:1.3 0.000057972619999999996 0.1184 AML other m 2020-12-20T04:39:04.46
IV.PII.HHN. ML:1.1 0.000032292389999999995 0.2592 AML other m 2020-12-20T04:39:06.27
IV.PII.HHE. ML:1.1 0.00003187826 0.1792 AML other m 2020-12-20T04:39:09.62
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