Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 01-04-2023 and time 10:41:10 (Italy) in region 1 km S Montagano (CB)

A magnitude ML 1.8 earthquake occured in region: 1 km S Montagano (CB), on

  • 01-04-2023 08:41:10 (UTC)
  • 01-04-2023 10:41:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.6350, 14.6740 at 25 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
Montagano CB 1 1086 1086
Ripalimosani CB 3 3114 4200
Matrice CB 4 1115 5315
Limosano CB 6 768 6083
Petrella Tifernina CB 7 1170 7253
Campolieto CB 8 839 8092
San Giovanni in Galdo CB 8 580 8672
Campobasso CB 9 49431 58103
Sant'Angelo Limosano CB 9 352 58455
Castellino del Biferno CB 9 545 59000
Oratino CB 9 1641 60641
Castropignano CB 9 947 61588
Toro CB 10 1391 62979
Campodipietra CB 11 2570 65549
Lucito CB 11 696 66245
San Biase CB 11 189 66434
Fossalto CB 12 1345 67779
Ferrazzano CB 12 3344 71123
Monacilioni CB 12 523 71646
Morrone del Sannio CB 12 587 72233
Torella del Sannio CB 13 795 73028
Busso CB 13 1273 74301
Ripabottoni CB 13 514 74815
Mirabello Sannitico CB 13 2180 76995
Casalciprano CB 13 564 77559
Castelbottaccio CB 14 312 77871
Pietracupa CB 14 215 78086
Molise CB 15 167 78253
Gildone CB 15 809 79062
Baranello CB 15 2673 81735
Lupara CB 15 505 82240
Provvidenti CB 16 119 82359
Civitacampomarano CB 16 417 82776
Jelsi CB 16 1781 84557
Sant'Elia a Pianisi CB 17 1818 86375
Vinchiaturo CB 17 3324 89699
Pietracatella CB 18 1375 91074
Sant'Elena Sannita IS 18 275 91349
Duronia CB 18 405 91754
Salcito CB 18 683 92437
Spinete CB 18 1320 93757
Casacalenda CB 19 2135 95892
Frosolone IS 19 3170 99062
Colle d'Anchise CB 19 807 99869
Cercepiccola CB 19 681 100550
Trivento CB 20 4730 105280
Bagnoli del Trigno IS 20 735 106015
Cercemaggiore CB 20 3777 109792
San Giuliano del Sannio CB 20 1029 110821

Municipalities with at least 50000 inhabitants

An earthquake occurred to
57 Km N of Benevento (60091 inhabitants)
59 Km W of San Severo (53905 inhabitants)
68 Km NE of Caserta (76326 inhabitants)
75 Km W of Foggia (151991 inhabitants)
81 Km NE of Acerra (59573 inhabitants)
81 Km N of Avellino (54857 inhabitants)
83 Km NE of Aversa (53047 inhabitants)
85 Km NE of Afragola (65057 inhabitants)
87 Km NE of Casoria (77642 inhabitants)
88 Km NE of Giugliano in Campania (122974 inhabitants)
90 Km SE of Chieti (51815 inhabitants)
91 Km NE of Marano di Napoli (59874 inhabitants)
94 Km N of Portici (55274 inhabitants)
95 Km NE of Napoli (974074 inhabitants)
96 Km N of Ercolano (53709 inhabitants)
98 Km N of Torre del Greco (86275 inhabitants)
99 Km N of Scafati (50787 inhabitants)
100 Km SE of Pescara (121014 inhabitants)
100 Km NE of Pozzuoli (81661 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 1.8 2023-04-01
08:41:10		 41.6348 14.6737 25 2024-03-01
17:18:05		 Bollettino Sismico Italiano INGV 116795311
Reviewed
Rev100 		ML 1.8 2023-04-01
08:41:10		 41.6515 14.6847 20 2023-04-01
08:55:14		 Sala Sismica INGV-Roma 115938011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-04-01 08:41:10 ± 0.22
Latitude 41.6348 ± 0.0072
Longitude 14.6737 ± 0.0096
Depth (km) 25 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 116795311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 849
Semi-minor axis of confidence ellipse (meter) 364
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 38
Circular confidence region, given by single value of horizontal uncertainty (meter) 850.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 103
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.10702
Epicentral distance of station farthest from the epicenter (degree) 0.68528
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 115938011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-04-01 08:55:14

ML:1.8

Field Value
Value 1.8
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 116795311
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-01-14 00:05:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.INTR.HHE. 2023-04-01T08:41:33.22 0.6 undecidable manual S 304 76.0683 102 -0.08 44
IV.LPEL.HHZ. 2023-04-01T08:41:29.53 0.6 undecidable manual S 319 61.0944 105 0.12 45
OT.OT16.EHN. 2023-04-01T08:41:25.77 0.6 undecidable manual S 62 46.7199 111 0.01 46
IV.INTR.HHE. 2023-04-01T08:41:23.02 0.3 undecidable manual P 304 76.0683 102 -0.5 60
IV.SGG.HHZ. 2023-04-01T08:41:22.68 0.6 undecidable manual S 222 36.8298 117 -0.67 42
IV.LPEL.HHZ. 2023-04-01T08:41:21.07 0.1 undecidable manual P 319 61.0944 105 -0.2 87
IV.PABO.HHE. 2023-04-01T08:41:21.48 0.6 undecidable manual S 298 26.9508 127 0.39 45
IV.SACR.HHZ. 2023-04-01T08:41:21.09 0.3 undecidable manual S 174 26.4513 127 0.09 71
IV.GATE.HHZ. 2023-04-01T08:41:20.22 0.6 undecidable manual S 124 23.8539 130 -0.22 47
OT.OT16.EHN. 2023-04-01T08:41:19.00 0.3 undecidable manual P 62 46.7199 111 -0.16 67
IV.VAGA.HHZ. 2023-04-01T08:41:18.90 0.3 undecidable manual P 236 43.8228 112 0.14 69
IV.BSSO.HHZ. 2023-04-01T08:41:18.07 0.3 undecidable manual S 214 11.877 151 -0.34 71
IV.CIGN.HHZ. 2023-04-01T08:41:18.97 0.6 undecidable manual S 84 19.2696 137 -0.6 42
IV.PABO.HHE. 2023-04-01T08:41:17.13 0.3 undecidable manual P 298 26.9508 127 0.66 63
IV.SGG.HHZ. 2023-04-01T08:41:17.69 0.3 undecidable manual P 222 36.8298 117 -0.08 71
IV.GATE.HHZ. 2023-04-01T08:41:16.60 0.3 undecidable manual P 124 23.8539 130 0.5 67
IV.SACR.HHZ. 2023-04-01T08:41:16.67 0.1 undecidable manual P 174 26.4513 127 0.26 93
IV.CIGN.HHZ. 2023-04-01T08:41:15.85 0.1 undecidable manual P 84 19.2696 137 0.26 95
IV.BSSO.HHZ. 2023-04-01T08:41:14.88 0.1 undecidable manual P 214 11.877 151 -0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BSSO.HNE. ML:2.0 0.000655 0.42 AML other m 2023-04-01T08:41:18.96
IV.BSSO.HHE. ML:2.0 0.000687 0.42 AML other m 2023-04-01T08:41:18.96
IV.BSSO.HHN. ML:1.9 0.000537 0.38 AML other m 2023-04-01T08:41:19.39
IV.BSSO.HNN. ML:1.9 0.00051007785 0.3776 AML other m 2023-04-01T08:41:19.20
IV.LPEL.HHN. ML:1.5 0.000061099795 0.0832 AML other m 2023-04-01T08:41:31.42
IV.LPEL.HHE. ML:1.5 0.000061937555 0.16 AML other m 2023-04-01T08:41:32.84
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