Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.8 on date 23-05-2023 and time 10:38:24 (Italy) in region 1 km W Montagano (CB)

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

  • 23-05-2023 08:38:24 (UTC)
  • 23-05-2023 10:38:24 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.6470, 14.6580 at 21 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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 4 3114 4200
Limosano CB 5 768 4968
Matrice CB 6 1115 6083
Petrella Tifernina CB 6 1170 7253
Sant'Angelo Limosano CB 7 352 7605
Castropignano CB 9 947 8552
Castellino del Biferno CB 9 545 9097
Oratino CB 9 1641 10738
Campolieto CB 9 839 11577
San Biase CB 10 189 11766
San Giovanni in Galdo CB 10 580 12346
Campobasso CB 10 49431 61777
Fossalto CB 10 1345 63122
Lucito CB 10 696 63818
Torella del Sannio CB 11 795 64613
Pietracupa CB 12 215 64828
Toro CB 12 1391 66219
Campodipietra CB 12 2570 68789
Morrone del Sannio CB 13 587 69376
Castelbottaccio CB 13 312 69688
Busso CB 13 1273 70961
Ferrazzano CB 13 3344 74305
Casalciprano CB 13 564 74869
Monacilioni CB 13 523 75392
Ripabottoni CB 13 514 75906
Molise CB 14 167 76073
Lupara CB 14 505 76578
Mirabello Sannitico CB 15 2180 78758
Civitacampomarano CB 15 417 79175
Baranello CB 16 2673 81848
Provvidenti CB 16 119 81967
Salcito CB 17 683 82650
Duronia CB 17 405 83055
Gildone CB 17 809 83864
Sant'Elena Sannita IS 17 275 84139
Trivento CB 18 4730 88869
Bagnoli del Trigno IS 18 735 89604
Vinchiaturo CB 18 3324 92928
Frosolone IS 18 3170 96098
Spinete CB 18 1320 97418
Jelsi CB 18 1781 99199
Sant'Elia a Pianisi CB 18 1818 101017
Casacalenda CB 19 2135 103152
Colle d'Anchise CB 19 807 103959
Pietracatella CB 19 1375 105334

Municipalities with at least 50000 inhabitants

An earthquake occurred to
58 Km N of Benevento (60091 inhabitants)
60 Km W of San Severo (53905 inhabitants)
69 Km NE of Caserta (76326 inhabitants)
77 Km W of Foggia (151991 inhabitants)
81 Km N of Acerra (59573 inhabitants)
82 Km N of Avellino (54857 inhabitants)
84 Km NE of Aversa (53047 inhabitants)
86 Km NE of Afragola (65057 inhabitants)
88 Km NE of Casoria (77642 inhabitants)
88 Km SE of Chieti (51815 inhabitants)
88 Km NE of Giugliano in Campania (122974 inhabitants)
92 Km NE of Marano di Napoli (59874 inhabitants)
95 Km N of Portici (55274 inhabitants)
96 Km NE of Napoli (974074 inhabitants)
97 Km N of Ercolano (53709 inhabitants)
98 Km SE of Pescara (121014 inhabitants)
99 Km N of Torre del Greco (86275 inhabitants)
100 Km N of Scafati (50787 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
Reviewed
Rev100 		ML 1.8 2023-05-23
08:38:24		 41.6468 14.6583 21 2023-05-23
08:59:40		 Sala Sismica INGV-Roma 117623361
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-23 08:38:24 ± 0.12
Latitude 41.6468 ± 0.0045
Longitude 14.6583 ± 0.0096
Depth (km) 21 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 117623361

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 766
Semi-minor axis of confidence ellipse (meter) 306
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 295
Circular confidence region, given by single value of horizontal uncertainty (meter) 770.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 85
Number of associated phases, regardless of their use for origin computation 56
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.48024
Number of stations at which the event was observed 50
Number of stations from which data was used for origin computation 14
Magnitude information

ML:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 36
Type of magnitude ML
Reference to an origin 117623361
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-23 08:59:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.FERS.HNZ. 2023-05-23T08:40:25.56 3.0 undecidable manual Sg 16.459999 0
MN.BNI.HHZ. 2023-05-23T08:40:23.36 3.0 positive manual Pg 23.5 0
GU.GRAM.HHZ. 2023-05-23T08:40:22.62 3.0 undecidable manual Sn 3.94 0
IV.ECTS.HHZ. 2023-05-23T08:40:20.45 3.0 undecidable manual Sg 19.639999 0
IV.GALF.HHZ. 2023-05-23T08:40:18.77 3.0 undecidable manual Sg 14.53 0
mn.BZS.HHZ. 2023-05-23T08:39:59.95 3.0 negative manual Pn 1.62 0
IV.RIBO.EHZ.01 2023-05-23T08:39:50.09 3.0 undecidable manual Sn 7.26 0
IV.ROVR.HHZ. 2023-05-23T08:39:49.88 3.0 positive manual Pg 16.16 0
IV.SENI.HNZ. 2023-05-23T08:39:39.19 3.0 undecidable manual Sg 10.16 0
IV.PIEI.HHZ. 2023-05-23T08:39:35.94 3.0 undecidable manual Sn 4.24 0
IV.CMDO.HHZ. 2023-05-23T08:39:34.82 3.0 positive manual Pg 11.01 0
GU.POPM.HHZ. 2023-05-23T08:39:32.01 3.0 undecidable manual Pg 13.11 0
7C.SPAOL.HNZ. 2023-05-23T08:39:31.38 3.0 positive manual Pg 8.89 0
IV.PLLN.EHZ. 2023-05-23T08:39:26.66 3.0 undecidable manual Pg 10.42 0
IV.CING.HHZ. 2023-05-23T08:39:19.96 3.0 undecidable manual Sn -2.11 0
IV.MMO1.EHZ. 2023-05-23T08:39:11.20 3.0 undecidable manual Sn 0.34 0
IV.IFIL.HHZ. 2023-05-23T08:39:10.76 3.0 positive manual Pn 2.5 0
IV.SELL.HHZ. 2023-05-23T08:39:06.92 3.0 positive manual Pn -2.12 0
IV.SSFR.HHZ. 2023-05-23T08:39:03.46 3.0 undecidable manual Pg 4.33 0
IV.PZUN.HHZ. 2023-05-23T08:39:02.82 3.0 undecidable manual Sn -0.54 0
IV.SPS2.HHZ. 2023-05-23T08:39:02.38 3.0 positive manual Pn -1.44 0
OT.OT12.EHZ. 2023-05-23T08:38:57.01 3.0 undecidable manual S 0.05 0
IV.PTQR.HHZ. 2023-05-23T08:38:55.01 3.0 undecidable manual S 0.37 0
IV.SGRT.HHZ. 2023-05-23T08:38:53.31 3.0 undecidable manual S -1.15 0
IV.RCAV.EHZ. 2023-05-23T08:38:50.94 3.0 undecidable manual Pg 6.67 0
IX.MNT3.EHZ.02 2023-05-23T08:38:50.60 3.0 undecidable manual S 0.26 0
IV.APRC.HHZ. 2023-05-23T08:38:46.63 3.0 undecidable manual S -4.31 0
IV.T0110.HHZ. 2023-05-23T08:38:40.13 3.0 positive manual P 0.29 0
IV.SNAL.HHZ. 2023-05-23T08:38:39.74 3.0 undecidable manual P 1.09 0
IV.APRC.HHZ. 2023-05-23T08:38:38.62 3.0 negative manual P -0.16 0
IV.CAFE.HHZ. 2023-05-23T08:38:38.71 3.0 positive manual P 0.87 0
IV.SGTA.HHZ. 2023-05-23T08:38:38.44 3.0 positive manual P 0.41 0
IV.POFI.HHZ. 2023-05-23T08:38:37.84 3.0 undecidable manual P 1.67 0
IV.INTR.HHZ. 2023-05-23T08:38:36.72 3.0 negative manual P 0.01 0
IV.PTRJ.HHZ. 2023-05-23T08:38:36.25 0.3 undecidable manual S 199 33.1446 114 0.09 72
IT.PLTA.HNN. 2023-05-23T08:38:35.30 0.3 undecidable manual S 22 28.6491 118 0.21 70
IV.LPEL.HHZ. 2023-05-23T08:38:34.69 3.0 positive manual P -0.55 0
IV.CERA.HHZ. 2023-05-23T08:38:34.13 1.0 positive manual P 264 53.3022 103 0.03 23
IV.MOCO.HHZ. 2023-05-23T08:38:34.77 3.0 negative manual P 0.55 0
IT.LRNO.HNE. 2023-05-23T08:38:34.93 0.3 undecidable manual S 51 27.9498 119 0 74
IV.SACR.HHZ. 2023-05-23T08:38:34.78 0.3 undecidable manual S 172 27.9498 119 -0.14 71
IV.PSB1.HHZ. 2023-05-23T08:38:33.70 3.0 negative manual P 1.8 0
IV.VAGA.HHZ. 2023-05-23T08:38:32.64 0.3 undecidable manual P 234 43.623 107 -0.01 71
IV.RNI2.HHZ. 2023-05-23T08:38:32.52 0.6 undecidable manual P 279 42.4242 108 0.05 47
IV.MELA.HHZ. 2023-05-23T08:38:31.91 0.3 undecidable manual P 80 39.4272 109 -0.12 70
IV.SGG.HHZ. 2023-05-23T08:38:31.62 0.3 undecidable manual P 219 37.0296 111 -0.07 71
IV.BSSO.HHZ. 2023-05-23T08:38:31.88 0.6 undecidable manual S 206 12.3765 145 0.12 49
IT.GLNS.HNN. 2023-05-23T08:38:31.70 0.3 undecidable manual P 36 36.4413 111 0.09 71
IV.GATE.HHZ. 2023-05-23T08:38:30.96 0.3 undecidable manual P 125 25.6521 121 0.85 59
IT.LRNO.HNE. 2023-05-23T08:38:30.46 0.1 undecidable manual P 51 27.9498 119 0.04 98
IV.SACR.HHZ. 2023-05-23T08:38:30.14 0.1 positive manual P 172 27.9498 119 -0.28 92
IT.PLTA.HNN. 2023-05-23T08:38:30.41 0.1 undecidable manual P 22 28.6491 118 -0.11 96
IV.PABO.HHZ. 2023-05-23T08:38:30.22 0.3 undecidable manual P 297 25.1526 122 0.17 71
IT.MCLF.HNE. 2023-05-23T08:38:30.72 0.1 undecidable manual P 28 31.9458 115 -0.24 93
IV.PTRJ.HHZ. 2023-05-23T08:38:30.95 0.3 undecidable manual P 199 33.1446 114 -0.19 70
IV.BSSO.HHZ. 2023-05-23T08:38:28.57 0.1 positive manual P 206 12.3765 145 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.BSSO.HHE. ML:2.3 0.00133 0.34 AML other m 2023-05-23T08:38:32.45
IV.BSSO.HHN. ML:2.0 0.000721 0.4 AML other m 2023-05-23T08:38:33.07
IV.SACR.HHE. ML:2.1 0.000484 0.82 AML other m 2023-05-23T08:38:35.10
IV.SACR.HNE. ML:2.1 0.0004895 0.82 AML other m 2023-05-23T08:38:35.11
IV.SACR.HHN. ML:1.8 0.0002875 0.78 AML other m 2023-05-23T08:38:35.35
IV.SACR.HNN. ML:1.9 0.0003285 0.78 AML other m 2023-05-23T08:38:35.36
IV.PABO.HHN. ML:1.6 0.0001725 0.58 AML other m 2023-05-23T08:38:36.26
IV.PTRJ.HHE. ML:2.0 0.0003825 1.4 AML other m 2023-05-23T08:38:36.18
IV.GATE.HNN. ML:1.7 0.0002385 0.42 AML other m 2023-05-23T08:38:37.79
IV.GATE.HHN. ML:1.7 0.00023799999999999998 0.4 AML other m 2023-05-23T08:38:37.79
IV.PTRJ.HHN. ML:1.8 0.00022999999999999998 0.7 AML other m 2023-05-23T08:38:37.27
IV.GATE.HNE. ML:1.7 0.000247 0.4 AML other m 2023-05-23T08:38:38.56
IV.GATE.HHE. ML:1.7 0.0002195 0.42 AML other m 2023-05-23T08:38:38.36
IV.PSB1.HHE. ML:1.6 0.00010630000000000001 0.98 AML other m 2023-05-23T08:38:40.86
IV.VAGA.HHN. ML:2.2 0.00039650000000000004 0.24 AML other m 2023-05-23T08:38:41.71
IV.VAGA.HHE. ML:2.0 0.000311 0.78 AML other m 2023-05-23T08:38:41.70
IV.PSB1.HHN. ML:1.6 0.00010125000000000001 1.66 AML other m 2023-05-23T08:38:42.14
IV.PABO.HHE. ML:1.4 0.0001194 0.46 AML other m 2023-05-23T08:38:44.23
IV.APRC.HHE. ML:1.9 0.000127 1.06 AML other m 2023-05-23T08:38:49.01
IV.INTR.HHN. ML:2.0 0.00015849999999999998 1.3 AML other m 2023-05-23T08:38:49.82
IV.CERA.HHN. ML:2.0 0.000231 1.4 AML other m 2023-05-23T08:38:49.94
IV.INTR.HHE. ML:2.0 0.00013700000000000002 0.2 AML other m 2023-05-23T08:38:50.43
IV.APRC.HHN. ML:2.1 0.0001715 1.1 AML other m 2023-05-23T08:38:50.05
IV.CERA.HHE. ML:1.9 0.00017099999999999998 1.2 AML other m 2023-05-23T08:38:51.67
IV.CAFE.HHN. ML:1.5 0.00003845 0.44 AML other m 2023-05-23T08:38:51.09
IV.CAFE.HHE. ML:1.7 0.00006565 0.18 AML other m 2023-05-23T08:38:52.09
IV.SGTA.HHN. ML:1.3 0.0000253 0.44 AML other m 2023-05-23T08:38:54.79
IV.POFI.HHN. ML:1.4 0.0000334 0.4 AML other m 2023-05-23T08:38:54.64
IV.SGRT.HHE. ML:1.9 0.0000896 0.78 AML other m 2023-05-23T08:38:55.01
IV.POFI.HHE. ML:1.3 0.0000307 0.98 AML other m 2023-05-23T08:38:55.91
IV.SGRT.HHN. ML:2.0 0.0001092 0.5 AML other m 2023-05-23T08:38:56.45
OT.OT12.EHE. ML:1.8 0.00006560000000000001 1.76 AML other m 2023-05-23T08:38:57.07
OT.OT12.EHN. ML:2.1 0.0001078 0.66 AML other m 2023-05-23T08:38:57.44
IV.SGTA.HHE. ML:1.5 0.00004265 0.64 AML other m 2023-05-23T08:38:58.86
IV.T0110.HHN. ML:1.8 0.00006835 0.32 AML other m 2023-05-23T08:38:59.93
IV.T0110.HHE. ML:1.9 0.00007295 0.42 AML other m 2023-05-23T08:39:08.54
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