Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.3 on date 18-05-2023 and time 20:59:11 (UTC) in region 1 km E Guardia Sanframondi (BN)

A magnitude ML 1.3 earthquake occured in region: 1 km E Guardia Sanframondi (BN), on

  • 18-05-2023 20:59:11 (UTC)
  • 18-05-2023 22:59:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.2600, 14.6110 at 12 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
Guardia Sanframondi BN 1 5078 5078
San Lorenzo Maggiore BN 2 2154 7232
San Lupo BN 2 801 8033
Cerreto Sannita BN 5 3940 11973
Castelvenere BN 6 2562 14535
San Lorenzello BN 6 2227 16762
Casalduni BN 7 1378 18140
Pontelandolfo BN 8 2167 20307
Telese Terme BN 8 7486 27793
Paupisi BN 8 1633 29426
Ponte BN 8 2580 32006
Solopaca BN 9 3820 35826
San Salvatore Telesino BN 10 3999 39825
Vitulano BN 10 2944 42769
Torrecuso BN 10 3407 46176
Morcone BN 10 4932 51108
Campolattaro BN 11 1072 52180
Pietraroja BN 11 545 52725
Faicchio BN 11 3634 56359
Cusano Mutri BN 12 4091 60450
Cautano BN 12 2044 62494
Foglianise BN 12 3385 65879
Fragneto Monforte BN 13 1840 67719
Frasso Telesino BN 13 2318 70037
Sassinoro BN 14 618 70655
Amorosi BN 14 2797 73452
Melizzano BN 14 1858 75310
Puglianello BN 14 1349 76659
Fragneto l'Abate BN 14 1049 77708
Gioia Sannitica CE 15 3638 81346
Campoli del Monte Taburno BN 15 1546 82892
Tocco Caudio BN 15 1508 84400
Castelpoto BN 15 1254 85654
Castel Campagnano CE 16 1581 87235
Sepino CB 17 1964 89199
Pesco Sannita BN 17 1972 91171
Ruviano CE 18 1655 92826
Santa Croce del Sannio BN 18 927 93753
Reino BN 18 1210 94963
Dugenta BN 19 2798 97761
Circello BN 20 2388 100149
Apollosa BN 20 2658 102807

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NW of Benevento (60091 inhabitants)
31 Km NE of Caserta (76326 inhabitants)
40 Km NE of Acerra (59573 inhabitants)
41 Km NW of Avellino (54857 inhabitants)
45 Km NE of Afragola (65057 inhabitants)
46 Km NE of Aversa (53047 inhabitants)
48 Km NE of Casoria (77642 inhabitants)
50 Km NE of Giugliano in Campania (122974 inhabitants)
53 Km NE of Portici (55274 inhabitants)
53 Km NE of Marano di Napoli (59874 inhabitants)
55 Km NE of Ercolano (53709 inhabitants)
56 Km NE of Napoli (974074 inhabitants)
56 Km NE of Torre del Greco (86275 inhabitants)
57 Km N of Scafati (50787 inhabitants)
63 Km N of Cava de' Tirreni (53659 inhabitants)
63 Km NE of Pozzuoli (81661 inhabitants)
64 Km N of Castellammare di Stabia (66466 inhabitants)
66 Km N of Salerno (135261 inhabitants)
79 Km NW of Battipaglia (50786 inhabitants)
80 Km SW of San Severo (53905 inhabitants)
81 Km W 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
Reviewed
Rev100 		ML 1.3 2023-05-18
20:59:11		 41.26 14.6112 12 2023-05-18
21:08:49		 Sala Sismica INGV-Roma 117462401
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-18 20:59:11 ± 0.22
Latitude 41.2600 ± 0.0081
Longitude 14.6112 ± 0.0144
Depth (km) 12 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 117462401

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 990
Semi-minor axis of confidence ellipse (meter) 838
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 262
Circular confidence region, given by single value of horizontal uncertainty (meter) 990.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 142
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.07824
Epicentral distance of station farthest from the epicenter (degree) 0.32286
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 117462401
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-18 21:08:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VAGA.HHZ. 2023-05-18T20:59:24.71 0.6 undecidable manual S 299 35.8419 91 0.86 37
IV.BSSO.HNZ. 2023-05-18T20:59:23.41 0.6 undecidable manual S 357 31.746 92 0.64 42
IV.PAOL.HHZ. 2023-05-18T20:59:21.08 0.6 undecidable manual S 188 25.6521 93 -0.05 49
IV.SACR.HHZ. 2023-05-18T20:59:19.27 0.6 undecidable manual S 27 17.1717 98 0.4 47
IV.VAGA.HHZ. 2023-05-18T20:59:19.30 0.6 negative manual P 299 35.8419 91 0.53 43
IV.PAOL.HHZ. 2023-05-18T20:59:17.15 0.6 undecidable manual P 188 25.6521 93 -0.05 49
IV.VITU.HHZ. 2023-05-18T20:59:17.04 0.6 undecidable manual S 169 8.6802 131 0.23 50
IV.PTRJ.HHZ. 2023-05-18T20:59:17.37 0.6 undecidable manual S 329 13.3755 109 -0.54 45
IV.BSSO.HNZ. 2023-05-18T20:59:17.81 1.0 undecidable manual P 357 31.746 92 -0.33 23
IV.SGG.HHZ. 2023-05-18T20:59:16.59 0.6 positive manual P 306 23.8539 93 -0.34 47
IV.SACR.HHZ. 2023-05-18T20:59:15.82 0.1 negative manual P 27 17.1717 98 -0.08 99
IV.PTRJ.HHZ. 2023-05-18T20:59:14.80 0.1 negative manual P 329 13.3755 109 -0.54 90
IV.VITU.HHZ. 2023-05-18T20:59:14.65 0.1 positive manual P 169 8.6802 131 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VITU.HHN. ML:1.6 0.00045850000000000003 0.56 AML other m 2023-05-18T20:59:17.91
IV.VITU.HHE. ML:1.4 0.00034599999999999995 0.8 AML other m 2023-05-18T20:59:18.94
IV.PTRJ.HHN. ML:1.4 0.0002265 0.8 AML other m 2023-05-18T20:59:18.56
IV.PTRJ.HHE. ML:1.4 0.000265 0.34 AML other m 2023-05-18T20:59:19.00
IV.SACR.HHN. ML:1.2 0.000126 1.36 AML other m 2023-05-18T20:59:20.78
IV.SACR.HHE. ML:1.2 0.00011365 1.02 AML other m 2023-05-18T20:59:20.22
IV.SGG.HHE. ML:1.1 0.0000757 1.38 AML other m 2023-05-18T20:59:23.11
IV.SGG.HHN. ML:1.3 0.0001295 0.46 AML other m 2023-05-18T20:59:23.23
IV.VAGA.HHE. ML:1.1 0.000051250000000000006 0.44 AML other m 2023-05-18T20:59:28.16
IV.VAGA.HHN. ML:1.3 0.00007005 1.02 AML other m 2023-05-18T20:59:32.28
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