Earthquake with magnitude of ML 2.0 on date 29-12-2020 and time 01:24:44 (Italy) in region 4 km NE Vecchiano (PI)

A magnitude ML 2.0 earthquake occured in region: 4 km NE Vecchiano (PI), on

  • 29-12-2020 00:24:44 (UTC)
  • 29-12-2020 01:24:44 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.8090, 10.4190 at 9 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Vecchiano PI 4 12189 12189
San Giuliano Terme PI 5 31399 43588
Lucca LU 8 89046 132634
Massarosa LU 9 22471 155105
Pisa PI 10 89158 244263
Calci PI 12 6426 250689
Capannori LU 13 46252 296941
Viareggio LU 15 62467 359408
Porcari LU 16 8845 368253
Buti PI 16 5791 374044
Camaiore LU 17 32513 406557
Pescaglia LU 18 3526 410083
Vicopisano PI 18 8559 418642
Cascina PI 18 45257 463899
Bientina PI 20 8062 471961

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km SW of Lucca (89046 inhabitants)
10 Km N of Pisa (89158 inhabitants)
15 Km E of Viareggio (62467 inhabitants)
30 Km NE of Livorno (159219 inhabitants)
34 Km SE of Massa (69479 inhabitants)
39 Km SE of Carrara (63133 inhabitants)
42 Km W of Pistoia (90315 inhabitants)
55 Km W of Prato (191150 inhabitants)
58 Km SE of La Spezia (93959 inhabitants)
62 Km W of Scandicci (50609 inhabitants)
67 Km W of Firenze (382808 inhabitants)
92 Km NW of Siena (53903 inhabitants)
100 Km S of Reggio nell'Emilia (171345 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 2.0 2020-12-29
00:24:44
43.8092 10.4188 9 2021-02-26
14:56:13
Bollettino Sismico Italiano INGV 86017801
Reviewed
Rev100
ML 2.0 2020-12-29
00:24:44
43.8078 10.4072 8 2020-12-29
00:33:12
Sala Sismica INGV-Roma 85815241
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-29 00:24:44 ± 0.1
Latitude 43.8092 ± 0.0036
Longitude 10.4188 ± 0.0100
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86017801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 798
Semi-minor axis of confidence ellipse (meter) 302
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 253
Circular confidence region, given by single value of horizontal uncertainty (meter) 800.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 164
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.11601
Epicentral distance of station farthest from the epicenter (degree) 0.80309
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:2.0

Field Value
Value 2.0
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 85815241
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-29 00:33:12

ML:2.0

Field Value
Value 2.0
Uncertainty 0.3
Num. used stations 9
Type of magnitude ML
Reference to an origin 86017801
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-04 17:20:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RUFI.EHZ. 2020-12-29T00:25:12.09 0.3 undecidable manual S 88 0.7869 50 0.81 53
IV.FROS.CHE. 2020-12-29T00:25:11.78 0.6 undecidable manual S 138 0.8031 50 0.03 44
IV.TRIF.CHE. 2020-12-29T00:25:10.62 0.6 undecidable manual S 153 0.7779 50 -0.38 41
IV.SEI.HHZ. 2020-12-29T00:25:09.38 0.6 undecidable manual S 70 0.7195 50 0.1 44
IV.MOCL.EHE. 2020-12-29T00:25:04.53 0.6 undecidable manual S 70 0.5828 50 -0.69 38
IV.FROS.CHE. 2020-12-29T00:25:00.95 0.6 undecidable manual P 138 0.8031 50 0.52 39
IV.RUFI.EHZ. 2020-12-29T00:25:00.63 1.0 undecidable manual P 88 0.7869 50 0.47 20
IV.TRIF.CHE. 2020-12-29T00:24:59.96 0.1 undecidable manual P 153 0.7779 50 -0.04 88
GU.SARM.EHE. 2020-12-29T00:24:59.06 0.3 undecidable manual S 358 0.3750 50 -0.01 72
IV.SEI.HHZ. 2020-12-29T00:24:59.23 0.3 undecidable manual P 70 0.7195 50 0.23 64
GU.EQUI.HHE. 2020-12-29T00:24:59.40 0.3 undecidable manual S 332 0.4047 50 -0.55 63
IV.CSNT.HHE. 2020-12-29T00:24:58.98 1.0 undecidable manual P 118 0.7141 50 0.07 22
GU.POPM.HHZ. 2020-12-29T00:24:57.64 0.3 undecidable manual S 46 0.3390 50 -0.36 67
IV.MOCL.EHE. 2020-12-29T00:24:56.30 0.6 undecidable manual P 70 0.5828 50 -0.36 43
GU.CARD.HHZ. 2020-12-29T00:24:53.90 0.3 undecidable manual S 12 0.2212 109 -0.12 73
GU.EQUI.HHE. 2020-12-29T00:24:53.73 0.3 undecidable manual P 332 0.4047 50 0.11 70
GU.SARM.EHE. 2020-12-29T00:24:53.37 0.1 undecidable manual P 358 0.3750 50 0.26 91
VR.VRG02.HH1. 2020-12-29T00:24:52.10 0.6 undecidable manual S 155 0.1673 115 0.01 50
VR.VRG01.HH1. 2020-12-29T00:24:52.54 0.6 undecidable manual S 161 0.1880 113 -0.27 47
GU.POPM.HHZ. 2020-12-29T00:24:52.43 0.1 positive manual P 46 0.3390 50 -0.06 96
VR.VRG03.HH1. 2020-12-29T00:24:52.24 0.6 undecidable manual S 168 0.1727 114 -0.02 50
GU.CARD.HHZ. 2020-12-29T00:24:50.49 0.1 undecidable manual P 12 0.2212 109 0.3 93
VR.VRG03.HH1. 2020-12-29T00:24:49.38 0.1 undecidable manual P 168 0.1727 114 0.2 96
VR.VRG02.HH1. 2020-12-29T00:24:49.38 0.6 undecidable manual P 155 0.1673 115 0.3 47
VR.VRG01.HH1. 2020-12-29T00:24:49.39 0.6 undecidable manual P 161 0.1880 113 -0.1 49
IV.PII.HHZ. 2020-12-29T00:24:49.78 0.3 undecidable manual S 139 0.1160 124 -0.57 66
IV.PII.HHZ. 2020-12-29T00:24:48.13 0.1 undecidable manual P 139 0.1160 124 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PII.HHE. ML:2.5 0.003255 0.08 AML other m 2020-12-29T00:24:50.02
IV.PII.HHN. ML:2.4 0.0027395185 0.08 AML other m 2020-12-29T00:24:50.02
GU.CARD.HHE. ML:2.1 0.0008343420500000001 0.36 AML other m 2020-12-29T00:24:59.31
GU.CARD.HHN. ML:2.1 0.0008432967 0.2 AML other m 2020-12-29T00:24:54.51
GU.POPM.HHN. ML:1.7 0.0001948422 0.08 AML other m 2020-12-29T00:24:58.34
GU.POPM.HHE. ML:1.7 0.0002064656 0.16 AML other m 2020-12-29T00:24:58.24
IV.SEI.HHE. ML:1.9 0.00010249895 0.58 AML other m 2020-12-29T00:25:13.98
IV.SEI.HHN. ML:2.0 0.000137630435 0.38 AML other m 2020-12-29T00:25:13.73
IV.RUFI.EHE. ML:2.0 0.000125933415 2.72 AML other m 2020-12-29T00:25:21.15
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download