Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 27-10-2020 and time 01:05:17 (UTC) in region 2 km NE Valva (SA)

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

  • 27-10-2020 01:05:17 (UTC)
  • 27-10-2020 02:05:17 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.7600, 15.2790 at 17 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
Valva SA 2 1643 1643
Laviano SA 4 1438 3081
Colliano SA 4 3638 6719
Calabritto AV 6 2391 9110
Santomenna SA 6 443 9553
Senerchia AV 7 842 10395
Castelnuovo di Conza SA 8 619 11014
Caposele AV 8 3483 14497
Oliveto Citra SA 8 3802 18299
Teora AV 10 1537 19836
Palomonte SA 11 3985 23821
Conza della Campania AV 12 1373 25194
Sant'Andrea di Conza AV 12 1539 26733
Contursi Terme SA 13 3394 30127
Pescopagano PZ 13 1910 32037
Castelgrande PZ 13 943 32980
Lioni AV 15 6201 39181
San Gregorio Magno SA 15 4286 43467
Buccino SA 16 5047 48514
Cairano AV 17 326 48840
Muro Lucano PZ 17 5497 54337
Campagna SA 18 16703 71040
Morra De Sanctis AV 19 1297 72337
Acerno SA 19 2783 75120
Bagnoli Irpino AV 19 3217 78337
Andretta AV 20 1927 80264
Romagnano al Monte SA 20 368 80632

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km NE of Battipaglia (50786 inhabitants)
44 Km E of Avellino (54857 inhabitants)
45 Km E of Salerno (135261 inhabitants)
46 Km W of Potenza (67122 inhabitants)
49 Km E of Cava de' Tirreni (53659 inhabitants)
59 Km SE of Benevento (60091 inhabitants)
63 Km E of Scafati (50787 inhabitants)
68 Km E of Castellammare di Stabia (66466 inhabitants)
77 Km E of Torre del Greco (86275 inhabitants)
77 Km SW of Cerignola (58396 inhabitants)
78 Km E of Portici (55274 inhabitants)
79 Km E of Ercolano (53709 inhabitants)
79 Km E of Acerra (59573 inhabitants)
81 Km S of Foggia (151991 inhabitants)
84 Km E of Afragola (65057 inhabitants)
85 Km E of Casoria (77642 inhabitants)
87 Km E of Caserta (76326 inhabitants)
87 Km E of Napoli (974074 inhabitants)
93 Km E of Giugliano in Campania (122974 inhabitants)
93 Km E of Marano di Napoli (59874 inhabitants)
93 Km E of Aversa (53047 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 2020-10-27
01:05:17		 40.7602 15.2793 17 2021-02-26
14:56:03		 Bollettino Sismico Italiano INGV 84577441
Reviewed
Rev100 		ML 1.8 2020-10-27
01:05:17		 40.7558 15.2697 16 2020-10-27
01:14:40		 Sala Sismica INGV-Roma 84168881
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-10-27 01:05:17 ± 0.11
Latitude 40.7602 ± 0.0045
Longitude 15.2793 ± 0.0071
Depth (km) 17 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84577441

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 580
Semi-minor axis of confidence ellipse (meter) 404
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 53
Circular confidence region, given by single value of horizontal uncertainty (meter) 580.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 56
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 32
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.08274
Epicentral distance of station farthest from the epicenter (degree) 0.58906
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 15
Type of magnitude ML
Reference to an origin 84577441
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-11-09 09:18:09

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 84168881
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-10-27 01:14:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ACER.HHZ. 2020-10-27T01:05:34.77 0.6 undecidable manual S 87 55.7997 98 0.29 45
IV.CMPR.HHZ. 2020-10-27T01:05:32.97 0.3 undecidable manual S 178 49.1175 99 0.27 67
IV.MCEL.HHN. 2020-10-27T01:05:29.22 1.0 undecidable manual P 137 65.3901 96 0.66 20
IX.SRN3.HNE.02 2020-10-27T01:05:29.20 0.6 undecidable manual S 154 33.9438 105 0.46 44
IV.CAFE.HHZ. 2020-10-27T01:05:28.31 0.6 undecidable manual S 353 29.9478 108 0.58 44
IX.MNT3.HHZ.02 2020-10-27T01:05:26.48 0.6 undecidable manual S 291 24.4533 114 0.13 49
IV.ACER.HHZ. 2020-10-27T01:05:26.75 0.1 undecidable manual P 87 55.7997 98 -0.35 87
IX.SALI.HNE.01 2020-10-27T01:05:26.01 0.3 undecidable manual S 336 20.5683 119 0.57 67
IV.SLCN.HHZ. 2020-10-27T01:05:26.60 0.6 undecidable manual P 144 50.7159 99 0.28 45
IV.CMPR.HHZ. 2020-10-27T01:05:25.77 0.1 positive manual P 178 49.1175 99 -0.3 91
IX.STN3.HHZ.02 2020-10-27T01:05:25.16 0.3 undecidable manual P 129 40.4262 102 0.4 67
IX.CMP3.HNE.02 2020-10-27T01:05:25.96 0.6 undecidable manual S 234 20.5683 119 0.53 44
IV.SNAL.HHZ. 2020-10-27T01:05:25.41 0.3 undecidable manual S 342 19.2696 121 0.28 72
IV.SGO.HHZ. 2020-10-27T01:05:25.94 0.6 undecidable manual S 174 22.2555 117 0.11 49
IX.NSC3.HHZ.02 2020-10-27T01:05:24.51 0.6 undecidable manual S 306 16.3725 127 0.03 50
IX.LIO3.HHE.02 2020-10-27T01:05:24.49 0.6 undecidable manual S 331 17.2716 125 -0.2 49
IV.MCRV.HHZ. 2020-10-27T01:05:23.12 0.3 undecidable manual S 285 9.6792 145 -0.11 76
IX.SRN3.HNE.02 2020-10-27T01:05:23.71 0.1 positive manual P 154 33.9438 105 -0.08 97
IX.RDM3.HHZ.02 2020-10-27T01:05:23.22 0.3 undecidable manual P 59 25.0527 113 0.72 63
IX.COL3.HHE.02 2020-10-27T01:05:22.81 0.6 undecidable manual S 152 9.1797 146 -0.35 48
IV.SGO.HHZ. 2020-10-27T01:05:22.02 0.1 undecidable manual P 174 22.2555 117 -0.09 99
IV.CAFE.HHZ. 2020-10-27T01:05:22.92 0.1 undecidable manual P 353 29.9478 108 -0.28 93
IX.MNT3.HHZ.02 2020-10-27T01:05:22.41 0.1 undecidable manual P 291 24.4533 114 0 100
IX.LIO3.HHE.02 2020-10-27T01:05:21.14 0.3 undecidable manual P 331 17.2716 125 -0.31 71
IX.SALI.HNE.01 2020-10-27T01:05:21.82 0.1 negative manual P 336 20.5683 119 -0.06 99
IX.CMP3.HNE.02 2020-10-27T01:05:21.97 0.1 undecidable manual P 234 20.5683 119 0.09 98
IV.SNAL.HHZ. 2020-10-27T01:05:21.61 0.1 positive manual P 342 19.2696 121 -0.09 99
IX.SCL3.HNE. 2020-10-27T01:05:21.67 0.1 undecidable manual P 110 20.7681 119 -0.23 96
IX.CLT3.HHE.02 2020-10-27T01:05:21.49 0.3 undecidable manual P 33 18.9699 122 -0.18 73
IX.NSC3.HHZ.02 2020-10-27T01:05:21.10 0.1 undecidable manual P 306 16.3725 127 -0.23 97
IV.MCRV.HHZ. 2020-10-27T01:05:20.38 0.1 negative manual P 285 9.6792 145 -0.23 98
IX.COL3.HHE.02 2020-10-27T01:05:20.26 0.1 negative manual P 152 9.1797 146 -0.3 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MCRV.HHN. ML:2.1 0.00109903575 0.12 AML other m 2020-10-27T01:05:23.73
IV.MCRV.HHE. ML:1.9 0.0006793770999999999 0.16 AML other m 2020-10-27T01:05:24.00
IV.SNAL.HNN. ML:1.6 0.000227136415 0.26 AML other m 2020-10-27T01:05:26.01
IV.SNAL.HHN. ML:1.6 0.000238694702 0.26 AML other m 2020-10-27T01:05:26.01
IV.SGO.HNE. ML:1.4 0.00012529568 0.24 AML other m 2020-10-27T01:05:26.28
IV.SGO.HHE. ML:1.5 0.0001871913 0.26 AML other m 2020-10-27T01:05:26.22
IX.MNT3.HNE.01 ML:1.6 0.000206199195 0.112 AML other m 2020-10-27T01:05:26.85
IV.SGO.HNN. ML:1.5 0.00018045015 0.12 AML other m 2020-10-27T01:05:26.88
IV.SGO.HHN. ML:1.5 0.0001919402 0.1 AML other m 2020-10-27T01:05:26.88
IX.MNT3.HHE.02 ML:1.6 0.0002356574 0.08 AML other m 2020-10-27T01:05:27.12
IX.MNT3.HHN.02 ML:1.8 0.0003565286 0.112 AML other m 2020-10-27T01:05:27.63
IV.ACER.HNN. ML:1.7 0.000120335135 0.72 AML other m 2020-10-27T01:05:36.66
IV.CMPR.HHN. ML:1.4 0.000057610090000000005 0.36 AML other m 2020-10-27T01:05:39.15
IV.CMPR.HHE. ML:1.3 0.000055637725 0.36 AML other m 2020-10-27T01:05:39.18
IV.ACER.HHE. ML:1.6 0.00008024791 0.98 AML other m 2020-10-27T01:05:40.70
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