Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 21-12-2021 and time 21:57:15 (Italy) in region 3 km SE Sapri (SA)

A magnitude ML 1.5 earthquake occured in region: 3 km SE Sapri (SA), on

  • 21-12-2021 20:57:15 (UTC)
  • 21-12-2021 21:57:15 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.0550, 15.6520 at 10 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 3 6770 6770
Torraca SA 7 1263 8033
Vibonati SA 8 3293 11326
Ispani SA 8 1026 12352
Maratea PZ 9 5139 17491
Rivello PZ 9 2767 20258
Tortorella SA 11 523 20781
Santa Marina SA 11 3243 24024
Casaletto Spartano SA 11 1420 25444
Trecchina PZ 11 2316 27760
Lagonegro PZ 12 5584 33344
Morigerati SA 13 665 34009
Nemoli PZ 13 1495 35504
Lauria PZ 16 12919 48423
Caselle in Pittari SA 16 1956 50379
San Giovanni a Piro SA 17 3780 54159
Torre Orsaia SA 18 2118 56277
Tortora CS 18 6187 62464
Casalbuono SA 18 1194 63658
Roccagloriosa SA 19 1722 65380

Municipalities with at least 50000 inhabitants

An earthquake occurred to
66 Km S of Potenza (67122 inhabitants)
84 Km SE of Battipaglia (50786 inhabitants)
99 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 1.5 2021-12-21
20:57:15		 40.0547 15.6523 10 2022-03-30
13:04:31		 Bollettino Sismico Italiano INGV 99868631
Reviewed
Rev100 		ML 1.5 2021-12-21
20:57:15		 40.042 15.6562 11 2021-12-21
21:02:15		 Sala Sismica INGV-Roma 98798271
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-21 20:57:15 ± 0.09
Latitude 40.0547 ± 0.0045
Longitude 15.6523 ± 0.0059
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99868631

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 529
Semi-minor axis of confidence ellipse (meter) 408
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 217
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 120
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.11242
Epicentral distance of station farthest from the epicenter (degree) 0.92630
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:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 99868631
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-06 11:02:31

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 98798271
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-21 21:02:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CELI.HHE. 2021-12-21T20:57:33.13 0.3 undecidable manual P 134 102.8193 50 0.43 58
IX.SRN3.HHZ.02 2021-12-21T20:57:32.20 0.6 undecidable manual S 341 50.616 50 0.69 39
IV.CDRU.HHZ. 2021-12-21T20:57:32.82 0.3 undecidable manual S 329 56.499 50 -0.27 66
IV.SCHR.EHZ. 2021-12-21T20:57:28.30 0.3 undecidable manual S 66 39.3273 50 -0.21 69
IV.GRIS.HNE. 2021-12-21T20:57:28.37 0.6 undecidable manual S 154 38.8278 50 0 48
IV.MCEL.HHZ. 2021-12-21T20:57:26.70 0.6 undecidable manual S 23 32.5452 50 0.01 48
IV.CET2.HHZ. 2021-12-21T20:57:26.83 0.3 undecidable manual P 156 63.7917 50 0.14 67
IV.CDRU.HHZ. 2021-12-21T20:57:25.11 0.3 undecidable manual P 329 56.499 50 -0.45 63
IV.BULG.HHZ. 2021-12-21T20:57:24.10 0.3 undecidable manual S 276 23.4543 113 -0.01 74
IV.MTSN.HHZ. 2021-12-21T20:57:24.80 0.3 undecidable manual S 20 24.9528 112 0.21 70
IX.SRN3.HHZ.02 2021-12-21T20:57:24.48 0.1 undecidable manual P 341 50.616 50 -0.18 90
IV.SIRI.HHZ. 2021-12-21T20:57:23.80 0.6 undecidable manual S 52 23.0547 113 -0.19 47
IV.SLCN.HHZ. 2021-12-21T20:57:23.62 0.3 undecidable manual P 357 37.2294 50 1.02 52
IV.GRIS.HNE. 2021-12-21T20:57:22.63 0.1 undecidable manual P 154 38.8278 50 -0.2 92
IV.SCHR.EHZ. 2021-12-21T20:57:22.64 0.1 undecidable manual P 66 39.3273 50 -0.28 90
IX.TEGI.HNN.01 2021-12-21T20:57:22.52 0.6 undecidable manual P 345 37.3293 50 -0.09 47
IV.MMN.HHE. 2021-12-21T20:57:22.04 0.6 undecidable manual P 122 34.0437 50 -0.05 48
IV.MCEL.HHZ. 2021-12-21T20:57:21.82 0.1 undecidable manual P 23 32.5452 50 -0.05 96
IV.BULG.HHZ. 2021-12-21T20:57:20.56 0.1 positive manual P 276 23.4543 113 0.18 95
IV.MTSN.HHZ. 2021-12-21T20:57:20.75 0.1 undecidable manual P 20 24.9528 112 0.1 96
IV.SIRI.HHZ. 2021-12-21T20:57:20.37 0.1 undecidable manual P 52 23.0547 113 0.06 97
IV.MGR.HHZ. 2021-12-21T20:57:20.43 0.3 undecidable manual S 318 12.4764 128 -0.36 70
IV.MGR.HHZ. 2021-12-21T20:57:18.48 0.1 negative manual P 318 12.4764 128 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BULG.HHN. ML:1.5 0.000212 0.92 AML other m 2021-12-21T20:57:25.80
IV.BULG.HNN. ML:1.5 0.0002215 0.92 AML other m 2021-12-21T20:57:25.34
IV.BULG.HHE. ML:1.4 0.000168 1.28 AML other m 2021-12-21T20:57:25.28
IV.BULG.HNE. ML:1.4 0.0001525 1.28 AML other m 2021-12-21T20:57:25.28
IV.SIRI.HNE. ML:1.6 0.00027400000000000005 0.76 AML other m 2021-12-21T20:57:26.43
IV.SIRI.HHN. ML:1.8 0.0003805 0.28 AML other m 2021-12-21T20:57:26.40
IV.SIRI.HNN. ML:1.8 0.0003615 0.28 AML other m 2021-12-21T20:57:26.40
IV.SIRI.HHE. ML:1.6 0.00025 0.28 AML other m 2021-12-21T20:57:26.41
IV.MTSN.HHE. ML:1.5 0.00017549999999999998 0.66 AML other m 2021-12-21T20:57:26.80
IV.MTSN.HHN. ML:1.5 0.0001965 0.2 AML other m 2021-12-21T20:57:26.51
IV.MCEL.HHE. ML:1.4 0.0001023 0.16 AML other m 2021-12-21T20:57:27.17
IV.MCEL.HHN. ML:1.3 0.0000924 1.24 AML other m 2021-12-21T20:57:27.30
IV.MCEL.HNE. ML:1.8 0.0002875 1.18 AML other m 2021-12-21T20:57:28.75
IV.MCEL.HNN. ML:1.8 0.0002565 0.62 AML other m 2021-12-21T20:57:28.71
IV.SCHR.EHN. ML:1.2 0.00005085 1.7 AML other m 2021-12-21T20:57:28.06
IV.SCHR.EHE. ML:1.1 0.00004425 0.24 AML other m 2021-12-21T20:57:29.53
IV.CDRU.HHE. ML:1.5 0.00007545 1.18 AML other m 2021-12-21T20:57:33.40
IV.CDRU.HHN. ML:1.2 0.00003435 0.42 AML other m 2021-12-21T20:57:33.42
IX.SRN3.HHN.02 ML:1.5 0.0000815 0.32 AML other m 2021-12-21T20:57:35.24
IX.SRN3.HHE.02 ML:1.5 0.00008834999999999999 0.74 AML other m 2021-12-21T20:57:37.49
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