Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 31-03-2023 and time 04:24:34 (Italy) in region 2 km SW Montagano (CB)

A magnitude ML 1.3 earthquake occured in region: 2 km SW Montagano (CB), on

  • 31-03-2023 02:24:34 (UTC)
  • 31-03-2023 04:24:34 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.6380, 14.6570 at 24 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.

Hai sentito il terremoto? Clicca qui

Did you feel it? Fill in the questionnaire.

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 2 1086 1086
Ripalimosani CB 3 3114 4200
Limosano CB 5 768 4968
Matrice CB 5 1115 6083
Petrella Tifernina CB 7 1170 7253
Sant'Angelo Limosano CB 8 352 7605
Castropignano CB 8 947 8552
Oratino CB 8 1641 10193
Campobasso CB 9 49431 59624
Campolieto CB 9 839 60463
San Giovanni in Galdo CB 9 580 61043
Castellino del Biferno CB 10 545 61588
Fossalto CB 10 1345 62933
San Biase CB 10 189 63122
Lucito CB 11 696 63818
Torella del Sannio CB 11 795 64613
Toro CB 12 1391 66004
Campodipietra CB 12 2570 68574
Ferrazzano CB 12 3344 71918
Busso CB 12 1273 73191
Casalciprano CB 12 564 73755
Pietracupa CB 12 215 73970
Morrone del Sannio CB 13 587 74557
Monacilioni CB 13 523 75080
Castelbottaccio CB 14 312 75392
Molise CB 14 167 75559
Mirabello Sannitico CB 14 2180 77739
Ripabottoni CB 14 514 78253
Baranello CB 15 2673 80926
Lupara CB 15 505 81431
Gildone CB 16 809 82240
Civitacampomarano CB 16 417 82657
Provvidenti CB 17 119 82776
Duronia CB 17 405 83181
Sant'Elena Sannita IS 17 275 83456
Vinchiaturo CB 17 3324 86780
Salcito CB 17 683 87463
Spinete CB 18 1320 88783
Jelsi CB 18 1781 90564
Frosolone IS 18 3170 93734
Bagnoli del Trigno IS 18 735 94469
Sant'Elia a Pianisi CB 18 1818 96287
Colle d'Anchise CB 18 807 97094
Trivento CB 19 4730 101824
Pietracatella CB 19 1375 103199
Casacalenda CB 20 2135 105334
Cercepiccola CB 20 681 106015

Municipalities with at least 50000 inhabitants

An earthquake occurred to
57 Km N of Benevento (60091 inhabitants)
60 Km W of San Severo (53905 inhabitants)
68 Km NE of Caserta (76326 inhabitants)
76 Km W of Foggia (151991 inhabitants)
81 Km N 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)
89 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 SE of Pescara (121014 inhabitants)
100 Km N of Scafati (50787 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 1.3 2023-03-31
02:24:34		 41.6383 14.657 24 2024-03-01
17:18:19		 Bollettino Sismico Italiano INGV 124479171
Reviewed
Rev100 		ML 1.3 2023-03-31
02:24:34		 41.6467 14.6592 19 2023-03-31
02:40:55		 Sala Sismica INGV-Roma 115901361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-03-31 02:24:34 ± 0.16
Latitude 41.6383 ± 0.0063
Longitude 14.6570 ± 0.0060
Depth (km) 24 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 124479171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 666
Semi-minor axis of confidence ellipse (meter) 177
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 341
Circular confidence region, given by single value of horizontal uncertainty (meter) 670.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
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) 0.29
Epicentral distance of station closest to the epicenter (degree) 0.10342
Epicentral distance of station farthest from the epicenter (degree) 0.67269
Number of stations at which the event was observed 14
Number of stations from which data was used for origin computation 14
Magnitudes information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.4
Num. used stations 9
Type of magnitude ML
Reference to an origin 115901361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-03-31 02:40:55

ML:1.3

Field Value
Value 1.3
Uncertainty 0.4
Num. used stations 9
Type of magnitude ML
Reference to an origin 124479171
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2024-01-04 10:57:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.INTR.HHE. 2023-03-31T02:24:57.03 0.6 undecidable manual S 304 74.6697 101 0.3 42
IV.LPEL.HHE. 2023-03-31T02:24:54.10 0.6 undecidable manual S 319 59.8956 105 1.23 29
OT.OT16.EHN. 2023-03-31T02:24:49.42 0.6 undecidable manual S 63 47.7189 109 -0.34 44
IV.VAGA.HHZ. 2023-03-31T02:24:49.64 0.6 undecidable manual S 235 42.9237 111 1.08 33
IV.RNI2.HHZ. 2023-03-31T02:24:48.07 0.3 undecidable manual S 280 42.4242 112 -0.36 69
IV.MELA.HHZ. 2023-03-31T02:24:47.74 0.3 undecidable manual S 79 39.627 113 -0.01 72
IT.GLNS.HNZ. 2023-03-31T02:24:47.57 0.6 undecidable manual S 35 37.2294 115 0.4 45
IV.SGG.HHZ. 2023-03-31T02:24:46.75 0.6 undecidable manual S 220 36.2415 116 -0.17 48
IV.INTR.HHE. 2023-03-31T02:24:46.79 0.3 undecidable manual P 304 74.6697 101 -0.33 64
IT.LRNO.HNN. 2023-03-31T02:24:45.65 0.6 undecidable manual S 49 28.6491 123 0.49 45
IT.PLTA.HNE. 2023-03-31T02:24:45.34 0.6 undecidable manual S 22 29.6481 122 -0.03 49
IV.CIGN.HHZ. 2023-03-31T02:24:44.03 0.6 undecidable manual S 85 20.6682 133 0.57 45
IV.SACR.HHZ. 2023-03-31T02:24:44.83 0.6 undecidable manual S 171 27.0507 125 0.04 49
IV.LPEL.HHE. 2023-03-31T02:24:44.70 0.3 undecidable manual P 319 59.8956 105 -0.19 68
IV.VAGA.HHZ. 2023-03-31T02:24:42.48 0.3 undecidable manual P 235 42.9237 111 0.07 71
OT.OT16.EHN. 2023-03-31T02:24:42.63 0.1 undecidable manual P 63 47.7189 109 -0.47 86
IV.RNI2.HHZ. 2023-03-31T02:24:42.57 0.3 undecidable manual P 280 42.4242 112 0.24 68
IV.BSSO.HHZ. 2023-03-31T02:24:41.68 0.6 undecidable manual S 207 11.4774 151 -0.26 49
IV.SGG.HHZ. 2023-03-31T02:24:41.24 0.3 undecidable manual P 220 36.2415 116 -0.22 71
IV.MELA.HHZ. 2023-03-31T02:24:41.78 0.1 undecidable manual P 79 39.627 113 -0.16 93
IT.GLNS.HNZ. 2023-03-31T02:24:41.57 0.3 undecidable manual P 35 37.2294 115 -0.03 72
IV.SACR.HHZ. 2023-03-31T02:24:40.23 0.3 undecidable manual P 171 27.0507 125 0 74
IT.PLTA.HNE. 2023-03-31T02:24:40.30 0.6 undecidable manual P 22 29.6481 122 -0.26 47
IT.LRNO.HNN. 2023-03-31T02:24:40.30 0.3 undecidable manual P 49 28.6491 123 -0.14 72
IV.GATE.HHZ. 2023-03-31T02:24:40.49 0.3 undecidable manual P 123 25.1526 127 0.49 68
IV.CIGN.HHZ. 2023-03-31T02:24:39.49 0.1 undecidable manual P 85 20.6682 133 0.03 100
IV.BSSO.HHZ. 2023-03-31T02:24:38.43 0.1 positive manual P 207 11.4774 151 -0.16 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BSSO.HNN. ML:1.6 0.0002615 1.44 AML other m 2023-03-31T02:24:42.12
IV.BSSO.HHN. ML:1.6 0.0002475 1.44 AML other m 2023-03-31T02:24:42.12
IV.BSSO.HHE. ML:1.7 0.00030199999999999997 0.5 AML other m 2023-03-31T02:24:42.45
IV.BSSO.HNE. ML:1.7 0.0002935 0.5 AML other m 2023-03-31T02:24:42.45
IV.CIGN.HHE. ML:0.8 0.00002904607 1.04 AML other m 2023-03-31T02:24:42.66
IV.CIGN.HHN. ML:0.7 0.000026767655 1.0608 AML other m 2023-03-31T02:24:42.81
IV.SACR.HHE. ML:1.3 0.00007489999999999999 0.8 AML other m 2023-03-31T02:24:45.00
IV.SACR.HHN. ML:1.0 0.000040407270500000005 0.52 AML other m 2023-03-31T02:24:45.00
IV.SACR.HNE. ML:1.1 0.00005303608 0.7696 AML other m 2023-03-31T02:24:45.03
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