Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 20-09-2021 and time 15:09:09 (Italy) in region 3 km W Caposele (AV)

A magnitude ML 1.6 earthquake occured in region: 3 km W Caposele (AV), on

  • 20-09-2021 13:09:09 (UTC)
  • 20-09-2021 15:09:09 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.8040, 15.1910 at 14 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
Caposele AV 3 3483 3483
Calabritto AV 3 2391 5874
Senerchia AV 7 842 6716
Teora AV 8 1537 8253
Lioni AV 8 6201 14454
Valva SA 10 1643 16097
Laviano SA 10 1438 17535
Bagnoli Irpino AV 11 3217 20752
Santomenna SA 11 443 21195
Castelnuovo di Conza SA 11 619 21814
Colliano SA 12 3638 25452
Nusco AV 13 4203 29655
Oliveto Citra SA 13 3802 33457
Acerno SA 13 2783 36240
Conza della Campania AV 14 1373 37613
Sant'Angelo dei Lombardi AV 14 4250 41863
Morra De Sanctis AV 14 1297 43160
Montella AV 15 7780 50940
Cassano Irpino AV 16 982 51922
Sant'Andrea di Conza AV 16 1539 53461
Rocca San Felice AV 17 851 54312
Torella dei Lombardi AV 17 2144 56456
Campagna SA 17 16703 73159
Guardia Lombardi AV 17 1718 74877
Contursi Terme SA 18 3394 78271
Pescopagano PZ 18 1910 80181
Palomonte SA 18 3985 84166
Andretta AV 18 1927 86093
Cairano AV 18 326 86419
Castelfranci AV 19 2041 88460

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NE of Battipaglia (50786 inhabitants)
35 Km E of Avellino (54857 inhabitants)
39 Km E of Salerno (135261 inhabitants)
42 Km E of Cava de' Tirreni (53659 inhabitants)
50 Km SE of Benevento (60091 inhabitants)
55 Km W of Potenza (67122 inhabitants)
56 Km E of Scafati (50787 inhabitants)
61 Km E of Castellammare di Stabia (66466 inhabitants)
70 Km E of Torre del Greco (86275 inhabitants)
70 Km E of Portici (55274 inhabitants)
71 Km E of Acerra (59573 inhabitants)
71 Km E of Ercolano (53709 inhabitants)
75 Km E of Afragola (65057 inhabitants)
77 Km E of Casoria (77642 inhabitants)
78 Km E of Caserta (76326 inhabitants)
79 Km SW of Cerignola (58396 inhabitants)
79 Km SW of Foggia (151991 inhabitants)
79 Km E of Napoli (974074 inhabitants)
84 Km E of Giugliano in Campania (122974 inhabitants)
85 Km E of Marano di Napoli (59874 inhabitants)
85 Km E of Aversa (53047 inhabitants)
93 Km E of Pozzuoli (81661 inhabitants)
99 Km S of San Severo (53905 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 2021-09-20
13:09:09		 40.8043 15.1913 14 2022-03-30
13:04:30		 Bollettino Sismico Italiano INGV 99738971
Reviewed
Rev100 		ML 1.7 2021-09-20
13:09:09		 40.8068 15.2022 14 2021-09-20
13:20:49		 Sala Sismica INGV-Roma 95664331
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-20 13:09:09 ± 0.09
Latitude 40.8043 ± 0.0036
Longitude 15.1913 ± 0.0083
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 99738971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 518
Semi-minor axis of confidence ellipse (meter) 491
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 274
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 72
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.23
Epicentral distance of station closest to the epicenter (degree) 0.02788
Epicentral distance of station farthest from the epicenter (degree) 0.37682
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:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 16
Type of magnitude ML
Reference to an origin 99738971
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-01-13 12:04:39

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 95664331
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-20 13:20:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IX.SRN3.HNE.02 2021-09-20T13:09:23.97 0.3 undecidable manual S 147 41.8248 95 0.58 62
IV.CDRU.HNZ. 2021-09-20T13:09:21.68 0.3 undecidable manual S 165 36.2415 96 -0.21 68
IV.CAFE.HNZ. 2021-09-20T13:09:19.36 0.3 undecidable manual S 9 25.0527 102 0.4 67
IV.SGO.HNZ. 2021-09-20T13:09:19.97 0.3 undecidable manual S 160 28.749 99 0.04 72
IX.CMP3.HNN.02 2021-09-20T13:09:17.83 0.3 undecidable manual S 209 19.2696 109 0.36 69
IX.SRN3.HNE.02 2021-09-20T13:09:17.42 0.6 undecidable manual P 147 41.8248 95 -0.2 45
IV.CDRU.HNZ. 2021-09-20T13:09:16.35 0.6 undecidable manual P 165 36.2415 96 -0.4 44
IX.RDM3.HHZ.02 2021-09-20T13:09:16.19 1.0 undecidable manual P 75 29.9478 99 0.39 22
IV.SNAL.HHZ. 2021-09-20T13:09:16.21 0.3 undecidable manual S 6 13.4754 122 0.14 72
IX.SALI.HNZ.01 2021-09-20T13:09:16.45 0.3 undecidable manual S 356 13.9749 121 0.27 70
IX.MNT3.EHZ.02 2021-09-20T13:09:16.86 0.3 undecidable manual S 283 15.873 116 0.23 71
IX.SNR3.EHZ.02 2021-09-20T13:09:15.34 0.3 undecidable manual S 179 7.5813 143 0.43 69
IV.CAFE.HNZ. 2021-09-20T13:09:15.00 0.6 undecidable manual P 9 25.0527 102 -0.06 48
IX.NSC3.EHZ.02 2021-09-20T13:09:15.04 0.3 undecidable manual S 309 7.4814 144 0.15 73
IV.SGO.HNZ. 2021-09-20T13:09:15.37 0.6 undecidable manual P 160 28.749 99 -0.25 46
IX.CMP3.HNN.02 2021-09-20T13:09:14.17 0.1 undecidable manual P 209 19.2696 109 -0.03 98
IV.MCRV.HHZ. 2021-09-20T13:09:14.09 0.3 undecidable manual S 219 3.0969 164 -0.29 71
IX.CLT3.HNZ.02 2021-09-20T13:09:14.66 0.6 undecidable manual P 58 20.9679 106 0.22 47
IX.MNT3.EHZ.02 2021-09-20T13:09:13.64 0.1 undecidable manual P 283 15.873 116 -0.08 98
IV.SNAL.HHZ. 2021-09-20T13:09:13.12 0.1 undecidable manual P 6 13.4754 122 -0.27 94
IX.SALI.HNZ.01 2021-09-20T13:09:13.18 0.1 undecidable manual P 356 13.9749 121 -0.27 94
IX.NSC3.EHZ.02 2021-09-20T13:09:12.49 0.1 undecidable manual P 309 7.4814 144 -0.22 96
IX.SNR3.EHZ.02 2021-09-20T13:09:12.72 0.1 undecidable manual P 179 7.5813 143 -0.01 100
IX.LIO3.HHZ.02 2021-09-20T13:09:12.70 0.6 undecidable manual P 355 10.2786 133 -0.3 47
IV.MCRV.HHZ. 2021-09-20T13:09:12.25 0.1 undecidable manual P 219 3.0969 164 -0.17 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MCRV.HHE. ML:1.4 0.0003372996 0.096 AML other m 2021-09-20T13:09:15.16
IX.NSC3.EHE.02 ML:1.6 0.00041749999999999996 0.78 AML other m 2021-09-20T13:09:15.17
IX.NSC3.EHN.02 ML:1.6 0.000507 0.1 AML other m 2021-09-20T13:09:15.73
IV.MCRV.HHN. ML:1.9 0.00105105865 0.1408 AML other m 2021-09-20T13:09:15.69
IX.SNR3.EHN.02 ML:1.8 0.0008179413 0.1472 AML other m 2021-09-20T13:09:16.25
IV.SNAL.HNN. ML:1.4 0.00023436525000000003 0.2176 AML other m 2021-09-20T13:09:16.68
IX.SNR3.EHE.02 ML:1.5 0.00039023572 0.128 AML other m 2021-09-20T13:09:16.91
IV.SNAL.HNE. ML:1.1 0.000121191435 0.16 AML other m 2021-09-20T13:09:16.76
IX.MNT3.EHE.02 ML:1.5 0.00025581569999999997 0.064 AML other m 2021-09-20T13:09:18.15
IX.MNT3.EHN.02 ML:1.8 0.0005595 0.1 AML other m 2021-09-20T13:09:17.69
IX.SNR3.HNE.01 ML:1.6 0.00046392776000000004 0.224 AML other m 2021-09-20T13:09:15.70
IX.SNR3.HNN.01 ML:1.9 0.0008830025 0.1472 AML other m 2021-09-20T13:09:16.17
IV.SNAL.HHN. ML:1.4 0.0002502528 0.1984 AML other m 2021-09-20T13:09:16.68
IV.SNAL.HHE. ML:1.2 0.00013558749 0.1856 AML other m 2021-09-20T13:09:16.75
IX.MNT3.HNE.01 ML:1.4 0.00020084845000000002 0.16 AML other m 2021-09-20T13:09:17.40
IX.MNT3.HNN.01 ML:1.8 0.00047617834999999996 0.0832 AML other m 2021-09-20T13:09:17.68
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