Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 28-04-2023 and time 11:42:43 (Italy) in region 3 km N Sicignano degli Alburni (SA)

A magnitude ML 1.1 earthquake occured in region: 3 km N Sicignano degli Alburni (SA), on

  • 28-04-2023 09:42:43 (UTC)
  • 28-04-2023 11:42:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.5880, 15.3130 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
Sicignano degli Alburni SA 3 3519 3519
Buccino SA 7 5047 8566
Postiglione SA 7 2151 10717
Petina SA 8 1159 11876
Palomonte SA 8 3985 15861
Contursi Terme SA 9 3394 19255
Auletta SA 10 2336 21591
Serre SA 11 3995 25586
San Gregorio Magno SA 11 4286 29872
Romagnano al Monte SA 11 368 30240
Salvitelle SA 12 560 30800
Castelcivita SA 12 1739 32539
Controne SA 13 875 33414
Pertosa SA 13 690 34104
Oliveto Citra SA 13 3802 37906
Ottati SA 14 618 38524
Sant'Angelo a Fasanella SA 15 635 39159
Colliano SA 16 3638 42797
Caggiano SA 16 2765 45562
Altavilla Silentina SA 16 7051 52613
Vietri di Potenza PZ 17 2832 55445
Aquara SA 17 1545 56990
Ricigliano SA 17 1144 58134
Polla SA 17 5279 63413
Valva SA 17 1643 65056
Corleto Monforte SA 18 592 65648
Bellosguardo SA 18 794 66442
Balvano PZ 18 1830 68272
Campagna SA 19 16703 84975
Senerchia AV 19 842 85817
Sant'Arsenio SA 20 2815 88632

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km E of Battipaglia (50786 inhabitants)
42 Km W of Potenza (67122 inhabitants)
48 Km E of Salerno (135261 inhabitants)
53 Km E of Cava de' Tirreni (53659 inhabitants)
57 Km SE of Avellino (54857 inhabitants)
69 Km E of Scafati (50787 inhabitants)
71 Km E of Castellammare di Stabia (66466 inhabitants)
75 Km SE of Benevento (60091 inhabitants)
83 Km E of Torre del Greco (86275 inhabitants)
85 Km E of Portici (55274 inhabitants)
85 Km E of Ercolano (53709 inhabitants)
89 Km E of Acerra (59573 inhabitants)
90 Km SW of Cerignola (58396 inhabitants)
92 Km E of Afragola (65057 inhabitants)
93 Km E of Casoria (77642 inhabitants)
94 Km E of Napoli (974074 inhabitants)
99 Km SE of Caserta (76326 inhabitants)
99 Km S of Foggia (151991 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 1.1 2023-04-28
09:42:43		 40.5878 15.313 10 2024-03-01
17:18:08		 Bollettino Sismico Italiano INGV 117420351
Reviewed
Rev100 		ML 1.3 2023-04-28
09:42:43		 40.5948 15.3067 6 2023-04-28
09:54:27		 Sala Sismica INGV-Roma 116832151
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-28 09:42:43 ± 0.06
Latitude 40.5878 ± 0.0036
Longitude 15.3130 ± 0.0071
Depth (km) 10 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 117420351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 612
Semi-minor axis of confidence ellipse (meter) 117
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 243
Circular confidence region, given by single value of horizontal uncertainty (meter) 610.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 101
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.02788
Epicentral distance of station farthest from the epicenter (degree) 0.48563
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 117420351
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2023-05-17 09:11:11

ML:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 116832151
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-28 09:54:27
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CMPR.HNE. 2023-04-28T09:42:54.16 0.6 undecidable manual S 182 29.9478 50 -0.03 49
IV.MGR.HHZ. 2023-04-28T09:42:53.51 0.6 undecidable manual P 158 53.9016 50 0.18 46
IV.MCRV.HHZ. 2023-04-28T09:42:52.76 0.3 undecidable manual S 331 24.753 111 0.12 73
IX.CMP3.HNE.02 2023-04-28T09:42:51.72 0.3 undecidable manual S 290 20.868 115 0.34 70
IV.SNAL.HNE. 2023-04-28T09:42:50.91 0.1 undecidable manual P 347 38.4282 50 -0.04 97
IX.SRN3.HHZ.02 2023-04-28T09:42:50.38 0.3 undecidable manual S 133 16.6722 120 0.3 71
IX.RDM3.HHZ.02 2023-04-28T09:42:50.90 0.6 undecidable manual P 30 37.0296 50 0.17 47
IV.CMPR.HNE. 2023-04-28T09:42:49.38 0.3 undecidable manual P 182 29.9478 50 -0.25 70
IX.NSC3.EHE.02 2023-04-28T09:42:49.77 0.6 undecidable manual P 331 32.9448 50 -0.32 46
IX.CMP3.HNE.02 2023-04-28T09:42:48.28 0.3 undecidable manual P 290 20.868 115 0.27 71
IV.MCRV.HHZ. 2023-04-28T09:42:48.46 0.3 undecidable manual P 331 24.753 111 -0.28 71
IV.CDRU.HHZ. 2023-04-28T09:42:48.47 0.3 undecidable manual S 184 10.878 131 0.01 77
IV.MRLC.HHE. 2023-04-28T09:42:48.64 0.6 undecidable manual P 38 23.8539 112 0.08 49
IX.SRN3.HHZ.02 2023-04-28T09:42:47.40 0.1 undecidable manual P 133 16.6722 120 0.14 99
IV.SGO.HHZ. 2023-04-28T09:42:46.58 0.3 undecidable manual S 189 3.0969 162 -0.34 73
IV.CDRU.HHZ. 2023-04-28T09:42:46.44 0.1 positive manual P 184 10.878 131 0.11 100
IX.COL3.HHZ.02 2023-04-28T09:42:46.31 0.3 undecidable manual P 8 11.0778 131 -0.05 76
IV.SGO.HHZ. 2023-04-28T09:42:45.13 0.1 undecidable manual P 189 3.0969 162 -0.31 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CDRU.HHN. ML:1.3 0.000244 0.48 AML other m 2023-04-28T09:42:49.43
IV.CDRU.HHE. ML:1.4 0.000315 0.52 AML other m 2023-04-28T09:42:49.82
IV.MCRV.HHE. ML:1.0 0.00005925 0.42 AML other m 2023-04-28T09:42:53.59
IV.MCRV.HHN. ML:1.1 0.00006825 1.06 AML other m 2023-04-28T09:42:54.05
IV.MGR.HHE. ML:0.9 0.00001755 0.74 AML other m 2023-04-28T09:43:05.96
IV.MGR.HHN. ML:1.1 0.000028450000000000004 0.44 AML other m 2023-04-28T09:43:05.76
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