Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 20-04-2022 and time 11:59:18 (UTC) in region 4 km E San Chirico Raparo (PZ)

A magnitude ML 1.8 earthquake occured in region: 4 km E San Chirico Raparo (PZ), on

  • 20-04-2022 11:59:18 (UTC)
  • 20-04-2022 13:59:18 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.1800, 16.1170 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.

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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
San Chirico Raparo PZ 4 1084 1084
Calvera PZ 4 387 1471
Carbone PZ 5 638 2109
Castronuovo di Sant'Andrea PZ 6 1067 3176
Teana PZ 7 613 3789
Fardella PZ 8 627 4416
Roccanova PZ 9 1543 5959
San Martino d'Agri PZ 9 801 6760
Chiaromonte PZ 10 1965 8725
Castelsaraceno PZ 11 1384 10109
Episcopia PZ 12 1434 11543
Missanello PZ 12 566 12109
Gallicchio PZ 12 862 12971
Francavilla in Sinni PZ 13 4215 17186
Latronico PZ 14 4556 21742
Armento PZ 15 631 22373
Senise PZ 15 7115 29488
Sant'Arcangelo PZ 16 6533 36021
Spinoso PZ 16 1462 37483
Montemurro PZ 17 1235 38718
Aliano MT 18 1008 39726
San Severino Lucano PZ 18 1563 41289

Municipalities with at least 50000 inhabitants

An earthquake occurred to
58 Km SE of Potenza (67122 inhabitants)
68 Km SW of Matera (60436 inhabitants)
81 Km SW of Altamura (70396 inhabitants)
99 Km N 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 1.8 2022-04-20
11:59:18		 40.1798 16.1168 9 2022-07-08
12:33:49		 Bollettino Sismico Italiano INGV 103625721
Reviewed
Rev100 		ML 1.8 2022-04-20
11:59:17		 40.1792 16.1272 9 2022-04-20
12:18:29		 Sala Sismica INGV-Roma 103528411
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2022-04-20 11:59:18 ± 0.16
Latitude 40.1798 ± 0.0090
Longitude 16.1168 ± 0.0118
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 103625721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1109
Semi-minor axis of confidence ellipse (meter) 823
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 145
Circular confidence region, given by single value of horizontal uncertainty (meter) 1110.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 141
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 20
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.37
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.66280
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 18
Type of magnitude ML
Reference to an origin 103528411
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2022-04-20 12:18:29

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 17
Type of magnitude ML
Reference to an origin 103625721
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-04-23 01:52:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SGG.HHZ. 2022-04-20T11:59:46.79 3.0 positive manual Pn -0.6 0
IV.PLAC.HHZ. 2022-04-20T11:59:42.71 3.0 undecidable manual Pn -1.18 0
IV.ACER.HHZ. 2022-04-20T11:59:40.14 0.6 undecidable manual S 348 68.8755 50 0.85 36
IV.MTMR.EHZ. 2022-04-20T11:59:39.09 3.0 undecidable manual P 0.79 0
IV.MIGL.HHZ. 2022-04-20T11:59:35.44 0.6 undecidable manual S 30 54.501 50 0 47
IV.PTRP.HHZ. 2022-04-20T11:59:31.71 0.6 undecidable manual S 353 38.2284 50 0.62 41
IV.CRAC.EHN. 2022-04-20T11:59:31.00 0.6 undecidable manual S 50 35.0427 50 0.76 39
IV.CET2.HHZ. 2022-04-20T11:59:31.79 0.6 undecidable manual P 191 73.5708 50 0.77 36
IV.ACER.HHZ. 2022-04-20T11:59:30.05 0.3 undecidable manual P 348 68.8755 50 -0.25 65
IV.MTSN.HHZ. 2022-04-20T11:59:29.24 0.6 undecidable manual S 287 32.4453 50 -0.3 46
IV.MCEL.HHZ. 2022-04-20T11:59:29.73 0.3 undecidable manual S 301 31.1466 50 0.52 65
IV.GRIS.HNE. 2022-04-20T11:59:28.20 0.3 undecidable manual P 205 53.6019 50 0.25 67
IV.MIGL.HHZ. 2022-04-20T11:59:27.17 0.3 undecidable manual P 30 54.501 50 -0.91 53
IV.SIRI.HHZ. 2022-04-20T11:59:26.30 0.6 undecidable manual S 271 21.1677 114 0.27 47
IV.SLCN.HHZ. 2022-04-20T11:59:26.94 0.3 undecidable manual P 300 47.1195 50 0 71
IV.PTRP.HHZ. 2022-04-20T11:59:25.40 0.1 undecidable manual P 353 38.2284 50 -0.17 93
IV.CRAC.EHN. 2022-04-20T11:59:24.84 0.3 undecidable manual P 50 35.0427 50 -0.24 69
IV.MMN.HHE. 2022-04-20T11:59:24.94 0.3 undecidable manual P 199 33.8439 50 0.05 72
IV.MCEL.HHZ. 2022-04-20T11:59:24.10 0.3 undecidable manual P 301 31.1466 50 -0.38 68
IV.MTSN.HHZ. 2022-04-20T11:59:23.93 0.1 undecidable manual P 287 32.4453 50 -0.75 79
IV.SIRI.HHZ. 2022-04-20T11:59:22.56 0.1 undecidable manual P 271 21.1677 114 -0.09 98
IV.SCHR.EHZ. 2022-04-20T11:59:21.68 0.3 undecidable manual S 302 4.0959 156 0.15 74
IV.SCHR.EHZ. 2022-04-20T11:59:20.16 0.1 undecidable manual P 302 4.0959 156 0.11 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SCHR.EHE. ML:2.4 0.00446 0.12 AML other m 2022-04-20T11:59:22.19
IV.SCHR.EHN. ML:2.2 0.00309 0.14 AML other m 2022-04-20T11:59:22.40
IV.ORI.HHE. ML:2.1 0.0005794999999999999 0.82 AML other m 2022-04-20T11:59:23.47
IV.SIRI.HHE. ML:1.6 0.00026153445 1.0624 AML other m 2022-04-20T11:59:26.43
IV.SIRI.HHN. ML:1.5 0.0002463343 0.8384 AML other m 2022-04-20T11:59:27.83
IV.MCEL.HHN. ML:1.7 0.000241 1.2 AML other m 2022-04-20T11:59:30.28
IV.MTSN.HNE. ML:1.9 0.0003505 1.34 AML other m 2022-04-20T11:59:31.72
IV.MTSN.HHE. ML:1.8 0.000312 0.26 AML other m 2022-04-20T11:59:31.53
IV.MTSN.HNN. ML:1.9 0.00035950000000000006 0.58 AML other m 2022-04-20T11:59:32.30
IV.MTSN.HHN. ML:1.9 0.0003665 0.6 AML other m 2022-04-20T11:59:32.30
IV.MCEL.HNN. ML:2.1 0.000653 0.44 AML other m 2022-04-20T11:59:32.71
IV.MCEL.HHE. ML:1.6 0.000163 0.58 AML other m 2022-04-20T11:59:33.20
IV.MCEL.HNE. ML:2.0 0.00045799999999999997 0.64 AML other m 2022-04-20T11:59:34.62
IV.SLCN.HHE. ML:1.8 0.00019350000000000001 0.3 AML other m 2022-04-20T11:59:37.68
IV.SLCN.HHN. ML:1.7 0.00013350000000000002 0.66 AML other m 2022-04-20T11:59:41.63
IV.PTRP.HHN. ML:1.6 0.00016099999999999998 0.74 AML other m 2022-04-20T11:59:44.32
IV.PTRP.HHE. ML:1.6 0.00016049999999999997 0.42 AML other m 2022-04-20T11:59:46.26
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