Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 21-12-2021 and time 19:52:51 (Italy) in region 2 km SE Sapri (SA)

A magnitude ML 1.6 earthquake occured in region: 2 km SE Sapri (SA), on

  • 21-12-2021 18:52:51 (UTC)
  • 21-12-2021 19:52:51 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.0640, 15.6510 at 11 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
Sapri SA 2 6770 6770
Torraca SA 6 1263 8033
Vibonati SA 8 3293 11326
Ispani SA 8 1026 12352
Rivello PZ 9 2767 15119
Tortorella SA 10 523 15642
Maratea PZ 10 5139 20781
Casaletto Spartano SA 10 1420 22201
Santa Marina SA 10 3243 25444
Lagonegro PZ 12 5584 31028
Trecchina PZ 12 2316 33344
Morigerati SA 12 665 34009
Nemoli PZ 13 1495 35504
Caselle in Pittari SA 15 1956 37460
Lauria PZ 16 12919 50379
Torre Orsaia SA 17 2118 52497
Casalbuono SA 17 1194 53691
San Giovanni a Piro SA 17 3780 57471
Tortora CS 19 6187 63658
Roccagloriosa SA 19 1722 65380

Municipalities with at least 50000 inhabitants

An earthquake occurred to
66 Km S of Potenza (67122 inhabitants)
83 Km SE of Battipaglia (50786 inhabitants)
100 Km NW of Cosenza (67546 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 1.6 2021-12-21
18:52:51		 40.0637 15.6513 11 2022-03-30
13:04:31		 Bollettino Sismico Italiano INGV 99869881
Reviewed
Rev100 		ML 1.6 2021-12-21
18:52:51		 40.048 15.6522 9 2021-12-21
18:58:00		 Sala Sismica INGV-Roma 98797221
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-21 18:52:51 ± 0.1
Latitude 40.0637 ± 0.0063
Longitude 15.6513 ± 0.0071
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99869881

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 621
Semi-minor axis of confidence ellipse (meter) 570
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 319
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.58276
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 99869881
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-06 10:56:12

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 98797221
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-21 18:58:00
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IT.ORP.HGZ. 2021-12-21T18:53:14.02 3.0 positive manual P -0.14 0
IV.CET2.HHZ. 2021-12-21T18:53:11.55 0.6 undecidable manual S 156 64.6908 50 -0.07 45
IV.GRIS.HNN. 2021-12-21T18:53:05.16 0.6 undecidable manual S 154 39.7269 50 0.21 48
IV.SCHR.EHN. 2021-12-21T18:53:04.03 0.6 undecidable manual S 67 39.0276 50 -0.72 39
IV.CET2.HHZ. 2021-12-21T18:53:03.50 0.3 undecidable manual P 156 64.6908 50 0.23 67
IV.MCEL.HHN. 2021-12-21T18:53:03.18 0.3 undecidable manual S 24 31.6461 50 0.39 72
IV.BULG.HHZ. 2021-12-21T18:53:01.00 0.3 undecidable manual S 274 23.2545 50 0.44 70
IV.CDRU.HHZ. 2021-12-21T18:53:01.62 0.3 undecidable manual P 328 55.5999 50 -0.25 65
IV.MTSN.HHZ. 2021-12-21T18:53:01.40 0.3 undecidable manual S 21 24.0537 50 0.65 63
IX.SRN3.HNE.02 2021-12-21T18:53:01.05 0.3 undecidable manual P 341 49.617 50 0.1 72
IV.SIRI.HHZ. 2021-12-21T18:53:00.40 0.3 undecidable manual S 54 22.5552 50 0.04 71
IV.MMN.HHN. 2021-12-21T18:52:59.11 0.3 undecidable manual P 123 34.6431 50 0.48 66
IV.SCHR.EHN. 2021-12-21T18:52:59.13 0.1 undecidable manual P 67 39.0276 50 -0.17 95
IV.GRIS.HNN. 2021-12-21T18:52:59.08 0.1 undecidable manual P 154 39.7269 50 -0.34 92
IV.MCEL.HHN. 2021-12-21T18:52:58.26 0.6 undecidable manual P 24 31.6461 50 0.08 49
IV.SLCN.HHZ. 2021-12-21T18:52:58.41 0.6 undecidable manual P 358 36.2415 50 -0.47 43
IV.MTSN.HHZ. 2021-12-21T18:52:57.33 0.1 positive manual P 21 24.0537 50 0.33 92
IV.BULG.HHZ. 2021-12-21T18:52:57.06 0.1 positive manual P 274 23.2545 50 0.18 97
IV.SIRI.HHZ. 2021-12-21T18:52:56.90 0.1 positive manual P 54 22.5552 50 0.13 94
IV.MGR.HHZ. 2021-12-21T18:52:56.90 0.6 undecidable manual S 315 11.6772 133 -0.54 49
IV.MGR.HHZ. 2021-12-21T18:52:54.98 0.1 negative manual P 315 11.6772 133 -0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MGR.HHE. ML:2.0 0.00121 0.18 AML other m 2021-12-21T18:52:57.14
IV.MGR.HNE. ML:2.0 0.0010350000000000001 0.16 AML other m 2021-12-21T18:52:57.05
IV.MGR.HNN. ML:2.0 0.001065 0.14 AML other m 2021-12-21T18:52:57.15
IV.MGR.HHN. ML:1.9 0.0009484999999999999 0.14 AML other m 2021-12-21T18:52:57.15
IV.BULG.HHE. ML:1.4 0.000142 0.3 AML other m 2021-12-21T18:53:01.76
IV.BULG.HNE. ML:1.3 0.00013000000000000002 0.28 AML other m 2021-12-21T18:53:01.77
IV.MTSN.HHE. ML:1.3 0.0001305 0.22 AML other m 2021-12-21T18:53:02.30
IV.BULG.HNN. ML:1.6 0.0002265 0.94 AML other m 2021-12-21T18:53:02.05
IV.BULG.HHN. ML:1.6 0.00021849999999999997 0.94 AML other m 2021-12-21T18:53:02.05
IV.SIRI.HHN. ML:1.7 0.0003095 0.28 AML other m 2021-12-21T18:53:02.76
IV.SIRI.HHE. ML:1.5 0.00021050000000000002 0.28 AML other m 2021-12-21T18:53:02.91
IV.SIRI.HNN. ML:1.7 0.0002935 0.28 AML other m 2021-12-21T18:53:02.77
IV.SIRI.HNE. ML:1.5 0.00021349999999999999 0.28 AML other m 2021-12-21T18:53:02.92
IV.MTSN.HHN. ML:1.5 0.000183 1.8 AML other m 2021-12-21T18:53:03.01
IV.CDRU.HHE. ML:1.6 0.00008080000000000001 0.82 AML other m 2021-12-21T18:53:09.89
IV.CDRU.HHN. ML:1.1 0.00002855 0.14 AML other m 2021-12-21T18:53:09.91
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