Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 06-04-2023 and time 01:17:39 (Italy) in region 3 km NE Valva (SA)

A magnitude ML 1.3 earthquake occured in region: 3 km NE Valva (SA), on

  • 05-04-2023 23:17:39 (UTC)
  • 06-04-2023 01:17:39 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.7610, 15.2870 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
Valva SA 3 1643 1643
Laviano SA 3 1438 3081
Colliano SA 4 3638 6719
Santomenna SA 6 443 7162
Calabritto AV 6 2391 9553
Castelnuovo di Conza SA 7 619 10172
Senerchia AV 7 842 11014
Caposele AV 8 3483 14497
Oliveto Citra SA 9 3802 18299
Teora AV 11 1537 19836
Palomonte SA 11 3985 23821
Conza della Campania AV 12 1373 25194
Sant'Andrea di Conza AV 12 1539 26733
Pescopagano PZ 13 1910 28643
Castelgrande PZ 13 943 29586
Contursi Terme SA 13 3394 32980
San Gregorio Magno SA 15 4286 37266
Lioni AV 16 6201 43467
Buccino SA 16 5047 48514
Muro Lucano PZ 17 5497 54011
Cairano AV 17 326 54337
Campagna SA 18 16703 71040
Morra De Sanctis AV 19 1297 72337
Romagnano al Monte SA 19 368 72705
Acerno SA 19 2783 75488
Andretta AV 19 1927 77415
Ricigliano SA 20 1144 78559

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NE of Battipaglia (50786 inhabitants)
45 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)
64 Km E of Scafati (50787 inhabitants)
68 Km E of Castellammare di Stabia (66466 inhabitants)
76 Km SW of Cerignola (58396 inhabitants)
78 Km E of Torre del Greco (86275 inhabitants)
79 Km E of Portici (55274 inhabitants)
79 Km E of Ercolano (53709 inhabitants)
80 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)
88 Km E of Caserta (76326 inhabitants)
88 Km E of Napoli (974074 inhabitants)
93 Km E of Giugliano in Campania (122974 inhabitants)
94 Km E of Marano di Napoli (59874 inhabitants)
94 Km E of Aversa (53047 inhabitants)
99 Km SW of Andria (100440 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 1.3 2023-04-05
23:17:39		 40.7608 15.2872 10 2024-03-01
17:18:06		 Bollettino Sismico Italiano INGV 117143341
Reviewed
Rev100 		ML 1.4 2023-04-05
23:17:39		 40.7568 15.3148 11 2023-04-05
23:29:44		 Sala Sismica INGV-Roma 116099771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-05 23:17:39 ± 0.11
Latitude 40.7608 ± 0.0045
Longitude 15.2872 ± 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 117143341

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 497
Semi-minor axis of confidence ellipse (meter) 122
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 231
Circular confidence region, given by single value of horizontal uncertainty (meter) 500.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.07554
Epicentral distance of station farthest from the epicenter (degree) 0.44247
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 117143341
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-01-08 18:02:15

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 116099771
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-05 23:29:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CMPR.HHZ. 2023-04-05T23:17:55.68 0.6 undecidable manual S 178 49.1175 50 0.26 45
IV.CMPR.HHZ. 2023-04-05T23:17:48.43 1.0 undecidable manual P 178 49.1175 50 -0.31 22
IV.SNAL.HHZ. 2023-04-05T23:17:47.81 0.3 undecidable manual S 340 19.3695 117 0.63 64
IV.MRLC.HHZ. 2023-04-05T23:17:46.68 0.3 undecidable manual S 92 16.9719 120 0.24 71
IX.LIO3.HHZ.02 2023-04-05T23:17:46.36 0.6 undecidable manual S 329 17.5713 120 -0.26 47
IX.CLT3.EHN.02 2023-04-05T23:17:46.58 0.6 undecidable manual S 32 18.5703 118 -0.35 46
IX.SNR3.EHZ.02 2023-04-05T23:17:44.51 0.6 undecidable manual S 251 8.3805 140 0.37 47
IV.MCRV.HHN. 2023-04-05T23:17:44.45 0.6 undecidable manual S 284 10.2786 134 -0.13 49
IX.COL3.HHZ.02 2023-04-05T23:17:44.12 0.3 undecidable manual S 156 8.9799 138 -0.15 74
IX.MNT3.EHN.02 2023-04-05T23:17:44.80 0.3 undecidable manual P 290 25.0527 112 -0.21 71
IX.LIO3.HHZ.02 2023-04-05T23:17:43.67 0.3 undecidable manual P 329 17.5713 120 0.01 74
IX.CLT3.EHN.02 2023-04-05T23:17:43.82 0.3 undecidable manual P 32 18.5703 118 -0.02 74
IV.MRLC.HHZ. 2023-04-05T23:17:43.53 0.3 undecidable manual P 92 16.9719 120 -0.02 74
IV.SNAL.HHZ. 2023-04-05T23:17:43.91 0.3 undecidable manual P 340 19.3695 117 -0.08 73
IX.SNR3.EHZ.02 2023-04-05T23:17:42.45 0.3 undecidable manual P 251 8.3805 140 0.23 72
IV.MCRV.HHN. 2023-04-05T23:17:42.27 0.1 undecidable manual P 284 10.2786 134 -0.2 97
IX.COL3.HHZ.02 2023-04-05T23:17:42.24 0.1 undecidable manual P 156 8.9799 138 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IX.COL3.HHE.02 ML:1.6 0.0005110000000000001 0.16 AML other m 2023-04-05T23:17:44.90
IX.COL3.HHN.02 ML:1.4 0.000379 0.96 AML other m 2023-04-05T23:17:44.92
IX.SNR3.EHE.02 ML:1.3 0.0003025 0.9 AML other m 2023-04-05T23:17:45.09
IX.SNR3.EHN.02 ML:1.6 0.0005780000000000001 1.08 AML other m 2023-04-05T23:17:46.19
IV.MRLC.HHN. ML:0.9 0.0000663 0.42 AML other m 2023-04-05T23:17:48.26
IV.MRLC.HHE. ML:0.9 0.00006305 0.56 AML other m 2023-04-05T23:17:48.30
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