Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.0 on date 08-12-2021 and time 12:06:50 (Italy) in region 4 km W Viggiano (PZ)

A magnitude ML 1.0 earthquake occured in region: 4 km W Viggiano (PZ), on

  • 08-12-2021 11:06:50 (UTC)
  • 08-12-2021 12:06:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.3480, 15.8630 at 6 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
Viggiano PZ 4 3329 3329
Marsicovetere PZ 4 5546 8875
Tramutola PZ 7 3089 11964
Grumento Nova PZ 8 1700 13664
Sarconi PZ 11 1404 15068
Paterno PZ 12 3368 18436
Moliterno PZ 12 4062 22498
Montemurro PZ 12 1235 23733
Spinoso PZ 13 1462 25195
Marsico Nuovo PZ 14 4098 29293
Calvello PZ 14 1948 31241
Laurenzana PZ 16 1797 33038
Montesano sulla Marcellana SA 16 6704 39742
Corleto Perticara PZ 16 2511 42253
Padula SA 17 5368 47621
Armento PZ 18 631 48252
Abriola PZ 18 1531 49783
Anzi PZ 19 1696 51479

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km S of Potenza (67122 inhabitants)
72 Km SW of Matera (60436 inhabitants)
79 Km SW of Altamura (70396 inhabitants)
80 Km E of Battipaglia (50786 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 1.0 2021-12-08
11:06:50		 40.3478 15.8628 6 2022-03-30
13:04:35		 Bollettino Sismico Italiano INGV 100592171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-08 11:06:50 ± 0.14
Latitude 40.3478 ± 0.0027
Longitude 15.8628 ± 0.0059
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100592171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 415
Semi-minor axis of confidence ellipse (meter) 278
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 258
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.16
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.23023
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.0

Field Value
Value 1.0
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 100592171
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-04 11:30:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IX.RSF3.HHZ.02 2021-12-08T11:07:04.59 3.0 undecidable manual P -0.03 0
IX.PGN3.HHZ.02 2021-12-08T11:06:59.69 0.6 undecidable manual S 347 25.4523 104 0.11 48
IV.SIRI.HHZ. 2021-12-08T11:06:57.48 0.3 undecidable manual S 179 18.3705 109 0.26 71
IV.SLCN.HHZ. 2021-12-08T11:06:57.87 0.6 undecidable manual S 284 19.9689 108 0.13 49
IV.PTRP.HHZ. 2021-12-08T11:06:56.14 1.0 undecidable manual P 41 25.5522 104 0.41 23
IX.PGN3.HHZ.02 2021-12-08T11:06:55.77 0.3 undecidable manual P 347 25.4523 104 0.05 74
IV.MTSN.HHZ. 2021-12-08T11:06:55.64 0.3 undecidable manual S 226 13.0758 116 0.14 74
IV.SIRI.HHZ. 2021-12-08T11:06:54.24 0.1 undecidable manual P 179 18.3705 109 -0.12 98
IV.SLCN.HHZ. 2021-12-08T11:06:54.57 0.3 undecidable manual P 284 19.9689 108 -0.09 74
IV.MTSN.HHZ. 2021-12-08T11:06:53.31 0.1 undecidable manual P 226 13.0758 116 -0.06 100
IX.VGG3.HNZ.01 2021-12-08T11:06:53.07 0.3 undecidable manual S 112 3.4965 151 0.09 76
IV.MCEL.HHZ. 2021-12-08T11:06:52.01 0.1 positive manual P 244 5.7942 138 -0.17 99
IX.VGG3.HNZ.01 2021-12-08T11:06:51.68 0.3 undecidable manual P 112 3.4965 151 -0.24 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MCEL.HHE. ML:0.0 0.00041209659999999997 0.1344 AML other m 2021-12-08T11:06:53.96
IV.MCEL.HHN. ML:0.0 0.00055018275 0.256 AML other m 2021-12-08T11:06:54.14
IV.SIRI.HHE. ML:1.1 0.000104006265 0.16 AML other m 2021-12-08T11:06:58.03
IV.MTSN.HHN. ML:1.0 0.00011035 1.08 AML other m 2021-12-08T11:06:57.11
IV.SIRI.HHN. ML:1.1 0.00011899999999999999 0.18 AML other m 2021-12-08T11:06:57.92
IV.MTSN.HHE. ML:0.9 0.00009080221999999999 0.1984 AML other m 2021-12-08T11:06:57.22
IV.MTSN.HNN. ML:0.9 0.0001067234 0.2304 AML other m 2021-12-08T11:06:57.11
IV.MTSN.HNE. ML:1.0 0.00012586215000000002 0.1984 AML other m 2021-12-08T11:06:57.22
IV.SLCN.HHN. ML:0.8 0.00005230782 0.1792 AML other m 2021-12-08T11:06:59.28
IV.SLCN.HHE. ML:0.9 0.00006330225 0.1408 AML other m 2021-12-08T11:07:00.82
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