Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 02-05-2023 and time 12:22:52 (Italy) in region 4 km NE San Gregorio Magno (SA)

A magnitude ML 1.6 earthquake occured in region: 4 km NE San Gregorio Magno (SA), on

  • 02-05-2023 10:22:52 (UTC)
  • 02-05-2023 12:22:52 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.6950, 15.4160 at 5 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 4 4286 4286
Ricigliano SA 6 1144 5430
Romagnano al Monte SA 8 368 5798
Buccino SA 8 5047 10845
Muro Lucano PZ 9 5497 16342
Balvano PZ 9 1830 18172
Castelgrande PZ 10 943 19115
Colliano SA 11 3638 22753
Palomonte SA 11 3985 26738
Salvitelle SA 12 560 27298
Bella PZ 13 5171 32469
Vietri di Potenza PZ 13 2832 35301
Valva SA 13 1643 36944
Laviano SA 14 1438 38382
Santomenna SA 15 443 38825
Oliveto Citra SA 15 3802 42627
Auletta SA 15 2336 44963
Baragiano PZ 15 2671 47634
Contursi Terme SA 16 3394 51028
Caggiano SA 16 2765 53793
Pescopagano PZ 16 1910 55703
Castelnuovo di Conza SA 16 619 56322
Pertosa SA 17 690 57012
Sant'Andrea di Conza AV 17 1539 58551
San Fele PZ 17 3004 61555
Sicignano degli Alburni SA 18 3519 65074
Savoia di Lucania PZ 18 1127 66201
Petina SA 18 1159 67360
Rapone PZ 18 990 68350
Senerchia AV 19 842 69192
Calabritto AV 19 2391 71583
Conza della Campania AV 19 1373 72956
Picerno PZ 20 5985 78941

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km W of Potenza (67122 inhabitants)
38 Km E of Battipaglia (50786 inhabitants)
55 Km E of Salerno (135261 inhabitants)
58 Km E of Avellino (54857 inhabitants)
60 Km E of Cava de' Tirreni (53659 inhabitants)
72 Km SE of Benevento (60091 inhabitants)
75 Km E of Scafati (50787 inhabitants)
76 Km SW of Cerignola (58396 inhabitants)
79 Km E of Castellammare di Stabia (66466 inhabitants)
86 Km S of Foggia (151991 inhabitants)
89 Km E of Torre del Greco (86275 inhabitants)
91 Km E of Portici (55274 inhabitants)
91 Km E of Ercolano (53709 inhabitants)
92 Km E of Acerra (59573 inhabitants)
95 Km SW of Andria (100440 inhabitants)
97 Km E of Afragola (65057 inhabitants)
97 Km W of Altamura (70396 inhabitants)
98 Km E of Casoria (77642 inhabitants)
99 Km E of Napoli (974074 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 1.6 2023-05-02
10:22:52		 40.6947 15.4163 5 2023-05-02
10:39:55		 Sala Sismica INGV-Roma 116955661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2023-05-02 10:22:52 ± 0.14
Latitude 40.6947 ± 0.0045
Longitude 15.4163 ± 0.0059
Depth (km) 5 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 116955661

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 510
Semi-minor axis of confidence ellipse (meter) 152
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 133
Circular confidence region, given by single value of horizontal uncertainty (meter) 510.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 81
Number of associated phases, regardless of their use for origin computation 25
Number of defining phases 19
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.27879
Number of stations at which the event was observed 18
Number of stations from which data was used for origin computation 12
Magnitude information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 116955661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2023-05-02 10:39:55
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MMN.HHZ. 2023-05-02T10:23:23.58 3.0 undecidable manual S -0.31 0
IX.NSC3.HNZ.02 2023-05-02T10:23:02.64 0.6 undecidable manual S 304 29.9478 99 0 49
IV.CDRU.HHZ. 2023-05-02T10:23:01.06 0.1 undecidable manual S 203 24.6531 101 0.23 94
IX.ACER.HHZ. 2023-05-02T10:23:01.18 3.0 undecidable manual P 0
IV.SGO.HNN. 2023-05-02T10:22:59.09 0.6 undecidable manual S 212 17.4714 105 0.68 42
IV.SNAL.HHZ. 2023-05-02T10:22:58.42 0.3 undecidable manual P 326 30.9468 99 0.02 73
IX.LIO3.HNZ. 2023-05-02T10:22:58.19 0.1 undecidable manual P 319 29.9478 99 -0.01 97
IX.RDM3.HNE.02 2023-05-02T10:22:57.47 0.1 undecidable manual P 27 22.4553 102 0.74 81
IX.NSC3.HNZ.02 2023-05-02T10:22:57.67 0.3 undecidable manual P 304 29.9478 99 -0.53 65
IX.STN3.EHZ.02 2023-05-02T10:22:57.03 3.0 undecidable manual P 0
IX.SNR3.EHZ.02 2023-05-02T10:22:56.26 3.0 undecidable manual P 0
IX.SRN3.HNE. 2023-05-02T10:22:56.80 0.1 undecidable manual P 171 23.3544 101 -0.11 96
IX.BEL3.HNN.01 2023-05-02T10:22:56.32 0.3 undecidable manual P 83 18.6702 104 0.33 70
IV.CDRU.HHZ. 2023-05-02T10:22:56.83 0.1 undecidable manual P 203 24.6531 101 -0.32 92
IV.MRLC.HHZ. 2023-05-02T10:22:55.82 0.1 undecidable manual S 42 9.1797 117 0.11 99
IV.SGO.HNN. 2023-05-02T10:22:55.71 0.3 undecidable manual P 212 17.4714 105 -0.05 74
IX.COL3.HHZ.02 2023-05-02T10:22:55.24 0.1 undecidable manual S 263 7.2927 123 0.1 99
IX.CSG3.HNZ.01 2023-05-02T10:22:55.44 3.0 undecidable manual P 0
IV.MCRV.HHZ. 2023-05-02T10:22:55.76 3.0 undecidable manual P -1.24 0
IX.SCL3.EHZ.02 2023-05-02T10:22:55.17 0.1 undecidable manual S 90 7.9809 120 -0.18 98
IV.MRLC.HHZ. 2023-05-02T10:22:54.03 0.1 undecidable manual P 42 9.1797 117 -0.17 98
IX.VDS3.HNZ.01 2023-05-02T10:22:54.64 0.1 undecidable manual S 10 5.1948 132 0.08 100
IX.VDS3.HNZ.01 2023-05-02T10:22:53.29 0.3 undecidable manual P 10 5.1948 132 -0.25 72
IX.SCL3.EHZ.02 2023-05-02T10:22:53.76 0.1 undecidable manual P 90 7.9809 120 -0.23 96
IX.COL3.HHZ.02 2023-05-02T10:22:53.72 0.3 undecidable manual P 263 7.2927 123 -0.15 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IX.COL3.HHN.02 ML:2.2 0.002645 1.14 AML other m 2023-05-02T10:22:55.85
IX.COL3.HHE.02 ML:2.4 0.0052699999999999995 1.8 AML other m 2023-05-02T10:22:55.97
IV.MRLC.HHN. ML:1.9 0.0015 0.4 AML other m 2023-05-02T10:22:56.46
IV.MRLC.HNN. ML:1.6 0.0007125 0.38 AML other m 2023-05-02T10:22:56.47
IV.MRLC.HHE. ML:1.7 0.0008485000000000001 1.7 AML other m 2023-05-02T10:22:56.98
IV.MRLC.HNE. ML:1.3 0.0003955 1.7 AML other m 2023-05-02T10:22:56.98
IV.CDRU.HHE. ML:1.6 0.0002595 0.24 AML other m 2023-05-02T10:23:01.50
IV.CDRU.HNE. ML:1.6 0.000247 0.24 AML other m 2023-05-02T10:23:01.51
IX.SNR3.EHE.02 ML:1.6 0.00036350000000000005 0.6 AML other m 2023-05-02T10:23:01.66
IV.CDRU.HNN. ML:1.3 0.0001421 0.44 AML other m 2023-05-02T10:23:02.07
IV.CDRU.HHN. ML:1.3 0.0001193 1.7 AML other m 2023-05-02T10:23:02.06
IX.SNR3.EHN.02 ML:1.9 0.000687 1.3 AML other m 2023-05-02T10:23:05.99
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