Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 27-05-2023 and time 21:52:31 (UTC) in region 3 km NW San Gregorio Magno (SA)

A magnitude ML 1.5 earthquake occured in region: 3 km NW San Gregorio Magno (SA), on

  • 27-05-2023 21:52:31 (UTC)
  • 27-05-2023 23:52:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.6830, 15.3830 at 11 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
San Gregorio Magno SA 3 4286 4286
Buccino SA 6 5047 9333
Romagnano al Monte SA 7 368 9701
Palomonte SA 8 3985 13686
Ricigliano SA 9 1144 14830
Colliano SA 9 3638 18468
Valva SA 11 1643 20111
Balvano PZ 12 1830 21941
Muro Lucano PZ 12 5497 27438
Salvitelle SA 12 560 27998
Oliveto Citra SA 12 3802 31800
Castelgrande PZ 12 943 32743
Contursi Terme SA 12 3394 36137
Laviano SA 13 1438 37575
Vietri di Potenza PZ 14 2832 40407
Auletta SA 14 2336 42743
Santomenna SA 15 443 43186
Sicignano degli Alburni SA 15 3519 46705
Bella PZ 16 5171 51876
Caggiano SA 16 2765 54641
Castelnuovo di Conza SA 16 619 55260
Senerchia AV 16 842 56102
Pertosa SA 16 690 56792
Petina SA 17 1159 57951
Pescopagano PZ 17 1910 59861
Calabritto AV 18 2391 62252
Baragiano PZ 18 2671 64923
Sant'Andrea di Conza AV 18 1539 66462
Postiglione SA 19 2151 68613
Savoia di Lucania PZ 19 1127 69740
Caposele AV 20 3483 73223
Serre SA 20 3995 77218
Conza della Campania AV 20 1373 78591

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km E of Battipaglia (50786 inhabitants)
36 Km W of Potenza (67122 inhabitants)
53 Km E of Salerno (135261 inhabitants)
56 Km E of Avellino (54857 inhabitants)
57 Km E of Cava de' Tirreni (53659 inhabitants)
71 Km SE of Benevento (60091 inhabitants)
73 Km E of Scafati (50787 inhabitants)
76 Km E of Castellammare di Stabia (66466 inhabitants)
78 Km SW of Cerignola (58396 inhabitants)
86 Km E of Torre del Greco (86275 inhabitants)
88 Km S of Foggia (151991 inhabitants)
88 Km E of Portici (55274 inhabitants)
88 Km E of Ercolano (53709 inhabitants)
90 Km E of Acerra (59573 inhabitants)
94 Km E of Afragola (65057 inhabitants)
95 Km E of Casoria (77642 inhabitants)
97 Km E of Napoli (974074 inhabitants)
98 Km SW of Andria (100440 inhabitants)
99 Km E of Caserta (76326 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
21:52:31		 40.6827 15.3827 11 2023-05-27
21:57:17		 Sala Sismica INGV-Roma 117792911
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-27 21:52:31 ± 0.12
Latitude 40.6827 ± 0.0072
Longitude 15.3827 ± 0.0095
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 117792911

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 930
Semi-minor axis of confidence ellipse (meter) 646
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 232
Circular confidence region, given by single value of horizontal uncertainty (meter) 930.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 104
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.03957
Epicentral distance of station farthest from the epicenter (degree) 0.60434
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 14
Type of magnitude ML
Reference to an origin 117792911
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-27 21:57:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.ACER.HHZ. 2023-05-27T21:52:47.34 0.1 undecidable manual S 76 48.5181 90 0.3 91
IV.SLCN.HHZ. 2023-05-27T21:52:43.97 0.6 undecidable manual S 147 38.7279 90 -0.47 41
IV.BULG.HHZ. 2023-05-27T21:52:43.16 0.1 undecidable manual P 180 67.0773 90 -0.24 85
IV.SNAL.HHZ. 2023-05-27T21:52:42.11 0.6 undecidable manual S 332 30.6471 90 -0.17 47
IX.NSC3.EHZ.02 2023-05-27T21:52:41.47 0.3 undecidable manual S 310 28.4493 90 -0.23 70
IV.CDRU.HHZ. 2023-05-27T21:52:40.75 0.6 undecidable manual S 197 22.3554 90 0.66 43
IV.ACER.HHZ. 2023-05-27T21:52:40.73 0.1 undecidable manual P 76 48.5181 90 0.19 92
IX.SNR3.EHZ.02 2023-05-27T21:52:39.12 0.3 undecidable manual S 290 16.9719 91 0.47 66
IV.SLCN.HHZ. 2023-05-27T21:52:38.57 0.1 undecidable manual P 147 38.7279 90 -0.46 84
IV.SNAL.HHZ. 2023-05-27T21:52:37.82 1.0 negative manual P 332 30.6471 90 0.04 24
IX.NSC3.EHZ.02 2023-05-27T21:52:37.19 0.1 undecidable manual P 310 28.4493 90 -0.27 92
IX.SNR3.EHZ.02 2023-05-27T21:52:36.16 0.6 positive manual P 290 16.9719 91 0.47 45
IV.CDRU.HHZ. 2023-05-27T21:52:36.93 0.3 positive manual P 197 22.3554 90 0.41 68
IX.COL3.HHZ.02 2023-05-27T21:52:35.43 0.6 undecidable manual S 276 4.3956 151 -0.37 48
IX.COL3.HHZ.02 2023-05-27T21:52:33.93 0.1 positive manual P 276 4.3956 151 -0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CDRU.HHN. ML:1.3 0.00011949999999999999 0.2 AML other m 2023-05-27T21:52:41.31
IX.SNR3.EHN.02 ML:2.0 0.000834 0.54 AML other m 2023-05-27T21:52:42.22
IV.CDRU.HHE. ML:1.5 0.000201 0.28 AML other m 2023-05-27T21:52:42.38
IX.SNR3.EHE.02 ML:1.7 0.000429 1.14 AML other m 2023-05-27T21:52:43.38
IX.NSC3.EHE.02 ML:1.7 0.0002675 0.2 AML other m 2023-05-27T21:52:43.46
IX.NSC3.EHN.02 ML:1.6 0.00020150000000000002 0.24 AML other m 2023-05-27T21:52:43.58
IV.ACER.HHE. ML:1.6 0.00009975 0.46 AML other m 2023-05-27T21:52:48.97
IV.SNAL.HHN. ML:1.4 0.00010275 1.04 AML other m 2023-05-27T21:52:49.80
IV.SNAL.HHE. ML:1.3 0.00009709999999999999 0.74 AML other m 2023-05-27T21:52:53.75
IV.ACER.HHN. ML:1.4 0.00007705 0.38 AML other m 2023-05-27T21:52:53.66
IV.SLCN.HHN. ML:1.4 0.0001 0.38 AML other m 2023-05-27T21:52:53.95
IV.SLCN.HHE. ML:1.6 0.0001295 0.98 AML other m 2023-05-27T21:52:54.68
IV.BULG.HHN. ML:1.6 0.00007125000000000001 0.74 AML other m 2023-05-27T21:53:01.37
IV.BULG.HHE. ML:1.4 0.00004845 0.6 AML other m 2023-05-27T21:53:02.77
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