Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 27-05-2023 and time 18:28:56 (Italy) in region 4 km NW San Gregorio Magno (SA)

A magnitude ML 1.5 earthquake occured in region: 4 km NW San Gregorio Magno (SA), on

  • 27-05-2023 16:28:56 (UTC)
  • 27-05-2023 18:28:56 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.6820, 15.3740 at 14 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.

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
San Gregorio Magno SA 4 4286 4286
Buccino SA 6 5047 9333
Palomonte SA 7 3985 13318
Romagnano al Monte SA 8 368 13686
Colliano SA 8 3638 17324
Ricigliano SA 9 1144 18468
Valva SA 11 1643 20111
Oliveto Citra SA 12 3802 23913
Contursi Terme SA 12 3394 27307
Balvano PZ 12 1830 29137
Muro Lucano PZ 12 5497 34634
Salvitelle SA 12 560 35194
Castelgrande PZ 13 943 36137
Laviano SA 13 1438 37575
Auletta SA 14 2336 39911
Vietri di Potenza PZ 15 2832 42743
Sicignano degli Alburni SA 15 3519 46262
Santomenna SA 15 443 46705
Senerchia AV 16 842 47547
Castelnuovo di Conza SA 16 619 48166
Caggiano SA 16 2765 50931
Bella PZ 16 5171 56102
Petina SA 17 1159 57261
Pertosa SA 17 690 57951
Calabritto AV 17 2391 60342
Pescopagano PZ 17 1910 62252
Postiglione SA 18 2151 64403
Sant'Andrea di Conza AV 18 1539 65942
Baragiano PZ 19 2671 68613
Serre SA 19 3995 72608
Caposele AV 19 3483 76091
Savoia di Lucania PZ 20 1127 77218
Conza della Campania AV 20 1373 78591

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Battipaglia (50786 inhabitants)
37 Km W of Potenza (67122 inhabitants)
52 Km E of Salerno (135261 inhabitants)
55 Km E of Avellino (54857 inhabitants)
56 Km E of Cava de' Tirreni (53659 inhabitants)
70 Km SE of Benevento (60091 inhabitants)
72 Km E of Scafati (50787 inhabitants)
75 Km E of Castellammare di Stabia (66466 inhabitants)
79 Km SW of Cerignola (58396 inhabitants)
86 Km E of Torre del Greco (86275 inhabitants)
87 Km E of Portici (55274 inhabitants)
88 Km E of Ercolano (53709 inhabitants)
88 Km S of Foggia (151991 inhabitants)
89 Km E of Acerra (59573 inhabitants)
93 Km E of Afragola (65057 inhabitants)
95 Km E of Casoria (77642 inhabitants)
96 Km E of Napoli (974074 inhabitants)
98 Km E of Caserta (76326 inhabitants)
98 Km SW of Andria (100440 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 1.5 2023-05-27
16:28:56		 40.6817 15.3738 14 2023-05-27
16:45:10		 Sala Sismica INGV-Roma 117784171
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-27 16:28:56 ± 0.09
Latitude 40.6817 ± 0.0045
Longitude 15.3738 ± 0.0059
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 117784171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 540
Semi-minor axis of confidence ellipse (meter) 54
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 296
Circular confidence region, given by single value of horizontal uncertainty (meter) 540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 46
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.62503
Number of stations at which the event was observed 33
Number of stations from which data was used for origin computation 17
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 26
Type of magnitude ML
Reference to an origin 117784171
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-27 16:45:10
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
GU.PZZ.HHZ. 2023-05-27T16:30:47.49 3.0 undecidable manual Pn 5.89 0
IV.MMGO.HHZ. 2023-05-27T16:30:43.56 3.0 undecidable manual Sg 9.48 0
IV.PIEI.HHZ. 2023-05-27T16:30:33.18 3.0 undecidable manual Sn -1.15 0
IV.FOSV.EHZ. 2023-05-27T16:30:29.10 3.0 undecidable manual Sg 1.89 0
IV.CIMA.HNZ. 2023-05-27T16:30:27.10 3.0 undecidable manual Sn 8.4 0
IV.GUMA.HHZ. 2023-05-27T16:30:16.48 3.0 undecidable manual Sn -0.12 0
IV.FNVD.HHZ. 2023-05-27T16:30:08.60 3.0 negative manual Pn 1.47 0
IV.MSRU.HHZ. 2023-05-27T16:30:06.04 3.0 undecidable manual Sn -0.1 0
IV.PE3.EHZ. 2023-05-27T16:30:02.96 3.0 positive manual Pg 9.61 0
IV.OSSC.HHZ. 2023-05-27T16:29:59.73 3.0 negative manual Pn -0.4 0
IV.ARVD.HHZ. 2023-05-27T16:29:55.01 3.0 positive manual Pg 6.44 0
IV.SSFR.HHZ. 2023-05-27T16:29:49.43 3.0 positive manual Pn 0.64 0
IV.RCAV.EHZ. 2023-05-27T16:29:38.35 3.0 negative manual Pg 5.83 0
IV.LRP.EHZ. 2023-05-27T16:29:29.12 3.0 undecidable manual Pg 3.62 0
IV.SPS2.HHZ. 2023-05-27T16:29:25.30 3.0 negative manual Pg 1.49 0
IV.SIRI.HHZ. 2023-05-27T16:29:17.16 0.6 undecidable manual S 143 69.375 93 -0.11 44
IV.MCEL.HHZ. 2023-05-27T16:29:14.05 0.6 undecidable manual S 137 53.6019 94 0.99 35
IV.ACER.HHZ. 2023-05-27T16:29:11.73 0.3 undecidable manual S 76 49.2174 94 -0.17 68
IV.MRVN.HHZ. 2023-05-27T16:29:10.59 3.0 positive manual P 0.01 0
IV.VULT.HHZ. 2023-05-27T16:29:09.35 0.3 undecidable manual S 34 36.5412 96 0.83 57
IV.CAFE.HHZ. 2023-05-27T16:29:09.55 1.0 undecidable manual S 343 40.1265 95 0.07 24
IV.CMPR.HHZ. 2023-05-27T16:29:09.71 0.6 undecidable manual S 188 40.7259 95 0.05 47
IV.SIRI.HHZ. 2023-05-27T16:29:08.19 1.0 undecidable manual P 143 69.375 93 -0.21 22
IV.SNAL.HHZ. 2023-05-27T16:29:07.20 0.6 undecidable manual S 333 30.3474 98 0.3 46
IX.LIO3.HNE.02 2023-05-27T16:29:06.36 0.3 undecidable manual S 326 28.8489 99 -0.14 72
IV.MCEL.HHZ. 2023-05-27T16:29:05.79 0.6 undecidable manual P 137 53.6019 94 -0.19 45
IV.ACER.HHZ. 2023-05-27T16:29:04.67 0.6 undecidable manual P 76 49.2174 94 -0.63 40
IV.SLCN.HHZ. 2023-05-27T16:29:04.12 0.6 undecidable manual P 146 39.0276 96 0.38 45
IV.CDRU.HHZ. 2023-05-27T16:29:04.94 0.6 undecidable manual S 195 22.0668 105 0.21 48
IX.SFL3.HNE.02 2023-05-27T16:29:04.83 1.0 undecidable manual S 55 20.868 106 0.4 23
IV.CAFE.HHZ. 2023-05-27T16:29:03.87 0.1 undecidable manual P 343 40.1265 95 -0.03 96
IV.CMPR.HHZ. 2023-05-27T16:29:03.64 0.6 undecidable manual P 188 40.7259 95 -0.37 45
IV.SGO.HHZ. 2023-05-27T16:29:03.25 0.6 undecidable manual S 203 14.5743 119 0.39 47
IV.MRLC.HHZ. 2023-05-27T16:29:02.48 0.3 undecidable manual S 49 12.7761 125 0.03 76
IX.NSC3.EHE.02 2023-05-27T16:29:02.13 1.0 undecidable manual P 311 27.9498 100 0.08 24
IV.SNAL.HHZ. 2023-05-27T16:29:02.42 0.1 undecidable manual P 333 30.3474 98 0.01 97
IV.VULT.HHZ. 2023-05-27T16:29:02.97 0.1 negative manual P 34 36.5412 96 -0.38 89
IX.RDM3.HNN.02 2023-05-27T16:29:02.14 0.3 undecidable manual P 32 25.4523 101 0.47 67
IV.CDRU.HHZ. 2023-05-27T16:29:01.01 0.1 positive manual P 195 22.0668 105 -0.15 96
IX.LIO3.HNE.02 2023-05-27T16:29:01.81 0.6 undecidable manual P 326 28.8489 99 -0.38 46
IX.VDS3.HNE.01 2023-05-27T16:29:01.65 0.3 undecidable manual S 34 7.9809 142 0.13 75
IX.CLT3.HNE.02 2023-05-27T16:29:01.78 0.3 undecidable manual P 6 24.6531 102 0.23 70
IV.SGO.HHZ. 2023-05-27T16:29:00.06 0.1 undecidable manual P 203 14.5743 119 -0.03 100
IX.SFL3.HNE.02 2023-05-27T16:29:00.80 0.1 undecidable manual P 55 20.868 106 -0.18 96
IX.VDS3.HNE.01 2023-05-27T16:28:59.18 0.1 undecidable manual P 34 7.9809 142 -0.13 99
IV.MRLC.HHZ. 2023-05-27T16:28:59.44 0.1 undecidable manual P 49 12.7761 125 -0.4 92
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MRLC.HNE. ML:1.5 0.00027400000000000005 0.18 AML other m 2023-05-27T16:29:02.81
IV.MRLC.HHE. ML:1.8 0.0005915 0.18 AML other m 2023-05-27T16:29:02.81
IV.MRLC.HNN. ML:1.4 0.0002495 0.18 AML other m 2023-05-27T16:29:03.11
IV.MRLC.HHN. ML:1.7 0.0005369999999999999 1.58 AML other m 2023-05-27T16:29:03.81
IV.SGO.HHN. ML:1.6 0.00033499999999999996 0.18 AML other m 2023-05-27T16:29:03.80
IV.SGO.HHE. ML:1.4 0.00023299999999999997 0.28 AML other m 2023-05-27T16:29:04.20
IV.CDRU.HHE. ML:1.7 0.0003265 0.36 AML other m 2023-05-27T16:29:05.05
IV.CDRU.HHN. ML:1.3 0.0001325 0.54 AML other m 2023-05-27T16:29:05.47
IV.CMPR.HHE. ML:1.4 0.00008435 0.64 AML other m 2023-05-27T16:29:10.82
IV.SNAL.HHE. ML:1.2 0.00008020000000000001 1.12 AML other m 2023-05-27T16:29:10.99
IV.SNAL.HHN. ML:1.3 0.0000885 1.58 AML other m 2023-05-27T16:29:12.84
IV.CMPR.HHN. ML:1.1 0.000041599999999999995 0.24 AML other m 2023-05-27T16:29:12.58
IV.SLCN.HHE. ML:1.5 0.00010114999999999999 0.4 AML other m 2023-05-27T16:29:13.72
IV.MCEL.HNN. ML:1.5 0.00008060000000000001 0.44 AML other m 2023-05-27T16:29:14.85
IV.SLCN.HHN. ML:1.3 0.00007264999999999999 0.44 AML other m 2023-05-27T16:29:15.43
IV.MCEL.HNE. ML:1.7 0.0001265 0.46 AML other m 2023-05-27T16:29:15.41
IV.MGR.HHN. ML:1.2 0.0000307 0.46 AML other m 2023-05-27T16:29:18.44
IV.SIRI.HHE. ML:1.3 0.00002835 0.42 AML other m 2023-05-27T16:29:19.38
IV.SIRI.HHN. ML:1.2 0.0000275 0.52 AML other m 2023-05-27T16:29:19.73
IV.MGR.HHE. ML:1.1 0.000024550000000000004 0.22 AML other m 2023-05-27T16:29:21.83
IV.SPS2.HHE. ML:2.2 0.00005535 0.32 AML other m 2023-05-27T16:29:59.68
IV.SPS2.HHN. ML:2.0 0.000037749999999999996 0.3 AML other m 2023-05-27T16:29:59.73
IV.OSSC.HHN. ML:3.0 0.0000349 0.16 AML other m 2023-05-27T16:30:12.59
IV.OSSC.HHE. ML:3.0 0.0000422 1.18 AML other m 2023-05-27T16:30:12.00
IV.VULT.HHE. ML:1.3 0.00006825808 0.1024 AML other m 2023-05-27T16:29:09.63
IV.VULT.HHN. ML:1.2 0.000059257070000000004 0.1024 AML other m 2023-05-27T16:29:10.01
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