Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 21-04-2023 and time 21:00:46 (UTC) in region 4 km NW Castelpagano (BN)

A magnitude ML 1.3 earthquake occured in region: 4 km NW Castelpagano (BN), on

  • 21-04-2023 21:00:46 (UTC)
  • 21-04-2023 23:00:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.4310, 14.7830 at 18 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
Castelpagano BN 4 1483 1483
Cercemaggiore CB 6 3777 5260
Santa Croce del Sannio BN 6 927 6187
Riccia CB 8 5262 11449
Circello BN 9 2388 13837
Colle Sannita BN 9 2431 16268
Gildone CB 10 809 17077
Jelsi CB 10 1781 18858
Cercepiccola CB 10 681 19539
Sassinoro BN 12 618 20157
San Giuliano del Sannio CB 12 1029 21186
Mirabello Sannitico CB 13 2180 23366
Castelvetere in Val Fortore BN 13 1240 24606
Sepino CB 14 1964 26570
Morcone BN 14 4932 31502
Gambatesa CB 14 1464 32966
Campodipietra CB 15 2570 35536
Ferrazzano CB 15 3344 38880
Tufara CB 15 925 39805
Reino BN 16 1210 41015
Toro CB 16 1391 42406
San Marco dei Cavoti BN 16 3371 45777
Baselice BN 16 2397 48174
Campolattaro BN 17 1072 49246
Pontelandolfo BN 18 2167 51413
Campobasso CB 18 49431 100844
Vinchiaturo CB 18 3324 104168
San Giovanni in Galdo CB 18 580 104748
Foiano di Val Fortore BN 18 1410 106158
Pietracatella CB 19 1375 107533
Molinara BN 19 1618 109151
Fragneto l'Abate BN 19 1049 110200
San Bartolomeo in Galdo BN 20 4867 115067

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km N of Benevento (60091 inhabitants)
55 Km NE of Caserta (76326 inhabitants)
57 Km N of Avellino (54857 inhabitants)
57 Km SW of San Severo (53905 inhabitants)
64 Km W of Foggia (151991 inhabitants)
64 Km NE of Acerra (59573 inhabitants)
69 Km NE of Afragola (65057 inhabitants)
70 Km NE of Aversa (53047 inhabitants)
71 Km NE of Casoria (77642 inhabitants)
74 Km NE of Giugliano in Campania (122974 inhabitants)
76 Km NE of Portici (55274 inhabitants)
77 Km NE of Marano di Napoli (59874 inhabitants)
78 Km NE of Ercolano (53709 inhabitants)
79 Km N of Scafati (50787 inhabitants)
79 Km NE of Napoli (974074 inhabitants)
80 Km NE of Torre del Greco (86275 inhabitants)
81 Km N of Cava de' Tirreni (53659 inhabitants)
84 Km N of Salerno (135261 inhabitants)
86 Km N of Castellammare di Stabia (66466 inhabitants)
87 Km NE of Pozzuoli (81661 inhabitants)
93 Km N of Battipaglia (50786 inhabitants)
95 Km W of Cerignola (58396 inhabitants)
97 Km W of Manfredonia (57279 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 2023-04-21
21:00:46		 41.4312 14.7827 18 2024-03-01
17:18:20		 Bollettino Sismico Italiano INGV 125074671
Reviewed
Rev100 		ML 1.3 2023-04-21
21:00:46		 41.4268 14.7817 15 2023-04-21
21:06:26		 Sala Sismica INGV-Roma 116583261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-21 21:00:46 ± 0.13
Latitude 41.4312 ± 0.0072
Longitude 14.7827 ± 0.0084
Depth (km) 18 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 125074671

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 796
Semi-minor axis of confidence ellipse (meter) 254
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 158
Circular confidence region, given by single value of horizontal uncertainty (meter) 800.0
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 27
Number of defining phases 27
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.31
Epicentral distance of station closest to the epicenter (degree) 0.06655
Epicentral distance of station farthest from the epicenter (degree) 0.95958
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 125074671
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-02-06 15:16:18

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 116583261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-21 21:06:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
OT.OT14.EHZ. 2023-04-21T21:01:04.64 0.3 undecidable manual P 61 106.5156 94 0.76 52
OT.OT16.EHN. 2023-04-21T21:01:02.64 0.6 undecidable manual S 36 55.1004 100 -0.69 38
IV.MELA.HHZ. 2023-04-21T21:01:00.14 0.6 undecidable manual S 43 41.7249 104 0.29 45
OT.OT05.EHZ. 2023-04-21T21:00:57.70 0.3 undecidable manual P 69 72.5718 97 -0.98 50
IV.SGG.HHN. 2023-04-21T21:00:57.89 0.6 undecidable manual S 262 33.9438 108 0.05 48
IV.MOCO.HHZ. 2023-04-21T21:00:57.93 0.3 undecidable manual S 102 31.9458 110 0.59 63
IV.CIGN.HHZ. 2023-04-21T21:00:56.18 0.6 undecidable manual S 22 26.751 114 0.13 48
IV.SGTA.HNZ. 2023-04-21T21:00:56.19 0.3 undecidable manual P 124 58.5969 99 -0.36 65
IV.VITU.HNE. 2023-04-21T21:00:56.84 0.6 undecidable manual S 205 30.3474 111 -0.08 48
OT.OT16.EHN. 2023-04-21T21:00:55.66 0.3 undecidable manual P 36 55.1004 100 -0.35 65
IV.PTRJ.HHZ. 2023-04-21T21:00:55.21 0.6 undecidable manual S 251 22.3554 120 0.2 48
IV.PSB1.HNE. 2023-04-21T21:00:54.87 0.6 undecidable manual S 174 23.1546 119 -0.33 47
IV.VAGA.HHZ. 2023-04-21T21:00:54.90 0.3 undecidable manual P 268 45.621 102 0.31 67
IV.BSSO.HHZ. 2023-04-21T21:00:54.47 0.6 undecidable manual S 309 20.2686 123 -0.05 48
IV.GATE.HHZ. 2023-04-21T21:00:53.61 0.6 undecidable manual S 49 13.9749 136 0.38 47
IV.MELA.HHZ. 2023-04-21T21:00:53.69 0.1 undecidable manual P 43 41.7249 104 -0.31 89
IV.MRB1.HHE. 2023-04-21T21:00:53.68 0.3 undecidable manual P 156 37.5291 106 0.31 67
IV.SGG.HHN. 2023-04-21T21:00:53.07 0.3 undecidable manual P 262 33.9438 108 0.23 69
IV.CIGN.HHZ. 2023-04-21T21:00:52.14 0.3 undecidable manual P 22 26.751 114 0.34 69
IV.VITU.HNE. 2023-04-21T21:00:52.38 0.3 undecidable manual P 205 30.3474 111 0.07 72
IV.SACR.HHZ. 2023-04-21T21:00:52.14 0.6 undecidable manual S 240 7.3815 154 -0.09 49
IV.MOCO.HHZ. 2023-04-21T21:00:52.64 0.1 undecidable manual P 102 31.9458 110 0.09 95
IV.BSSO.HHZ. 2023-04-21T21:00:51.31 0.1 positive manual P 309 20.2686 123 0.39 92
IV.PSB1.HNE. 2023-04-21T21:00:51.05 0.1 undecidable manual P 174 23.1546 119 -0.26 94
IV.PTRJ.HHZ. 2023-04-21T21:00:51.16 0.1 undecidable manual P 251 22.3554 120 -0.05 98
IV.GATE.HHZ. 2023-04-21T21:00:50.20 0.1 undecidable manual P 49 13.9749 136 0.03 100
IV.SACR.HHZ. 2023-04-21T21:00:49.12 0.1 positive manual P 240 7.3815 154 -0.48 91
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SACR.HHE. ML:1.2 0.0001215 0.4 AML other m 2023-04-21T21:00:53.09
IV.SACR.HHN. ML:1.0 0.00008730000000000001 1.06 AML other m 2023-04-21T21:00:53.40
IV.GATE.HHE. ML:1.5 0.0002075 0.54 AML other m 2023-04-21T21:00:54.56
IV.GATE.HNE. ML:1.5 0.0002255 0.54 AML other m 2023-04-21T21:00:54.56
IV.GATE.HNN. ML:1.5 0.00021050000000000002 0.36 AML other m 2023-04-21T21:00:54.53
IV.GATE.HHN. ML:1.4 0.000202 0.36 AML other m 2023-04-21T21:00:54.35
IV.PTRJ.HHN. ML:1.0 0.0000528 0.5 AML other m 2023-04-21T21:00:56.65
IV.PTRJ.HHE. ML:1.1 0.00007364999999999999 0.16 AML other m 2023-04-21T21:00:56.67
IV.MELA.HHE. ML:1.5 0.0000955 0.38 AML other m 2023-04-21T21:01:00.50
IV.MELA.HHN. ML:1.3 0.000053849999999999994 0.98 AML other m 2023-04-21T21:01:04.41
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