Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 31-05-2021 and time 16:24:06 (Italy) in region 2 km SE Sant'Angelo dei Lombardi (AV)

A magnitude ML 1.4 earthquake occured in region: 2 km SE Sant'Angelo dei Lombardi (AV), on

  • 31-05-2021 14:24:06 (UTC)
  • 31-05-2021 16:24:06 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.9180, 15.2030 at 13 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

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
Sant'Angelo dei Lombardi AV 3 4250 4250
Morra De Sanctis AV 4 1297 5547
Guardia Lombardi AV 4 1718 7265
Lioni AV 5 6201 13466
Rocca San Felice AV 5 851 14317
Torella dei Lombardi AV 8 2144 16461
Teora AV 8 1537 17998
Andretta AV 10 1927 19925
Nusco AV 11 4203 24128
Villamaina AV 11 995 25123
Caposele AV 12 3483 28606
Carife AV 12 1408 30014
Conza della Campania AV 13 1373 31387
Castelfranci AV 14 2041 33428
Frigento AV 14 3780 37208
Vallata AV 14 2714 39922
Sturno AV 14 3080 43002
Cairano AV 14 326 43328
Bagnoli Irpino AV 15 3217 46545
Castel Baronia AV 15 1129 47674
Castelnuovo di Conza SA 15 619 48293
Calabritto AV 15 2391 50684
Gesualdo AV 15 3516 54200
Trevico AV 15 993 55193
Paternopoli AV 16 2384 57577
Santomenna SA 16 443 58020
Cassano Irpino AV 16 982 59002
San Nicola Baronia AV 16 771 59773
Sant'Andrea di Conza AV 16 1539 61312
San Sossio Baronia AV 17 1643 62955
Vallesaccarda AV 17 1386 64341
Laviano SA 17 1438 65779
Montemarano AV 17 2851 68630
Montella AV 18 7780 76410
Flumeri AV 18 2963 79373
Bisaccia AV 18 3831 83204
Castelvetere sul Calore AV 18 1615 84819
Pescopagano PZ 19 1910 86729
Fontanarosa AV 19 3170 89899
Luogosano AV 20 1187 91086
Senerchia AV 20 842 91928
San Mango sul Calore AV 20 1185 93113
Calitri AV 20 4666 97779

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km E of Avellino (54857 inhabitants)
39 Km NE of Battipaglia (50786 inhabitants)
43 Km SE of Benevento (60091 inhabitants)
46 Km NE of Salerno (135261 inhabitants)
48 Km NE of Cava de' Tirreni (53659 inhabitants)
59 Km NW of Potenza (67122 inhabitants)
60 Km E of Scafati (50787 inhabitants)
66 Km E of Castellammare di Stabia (66466 inhabitants)
67 Km SW of Foggia (151991 inhabitants)
70 Km E of Acerra (59573 inhabitants)
70 Km SW of Cerignola (58396 inhabitants)
72 Km E of Torre del Greco (86275 inhabitants)
72 Km E of Portici (55274 inhabitants)
73 Km E of Ercolano (53709 inhabitants)
75 Km E of Afragola (65057 inhabitants)
75 Km E of Caserta (76326 inhabitants)
77 Km E of Casoria (77642 inhabitants)
81 Km E of Napoli (974074 inhabitants)
84 Km E of Aversa (53047 inhabitants)
84 Km E of Giugliano in Campania (122974 inhabitants)
85 Km E of Marano di Napoli (59874 inhabitants)
87 Km S of San Severo (53905 inhabitants)
94 Km E of Pozzuoli (81661 inhabitants)
98 Km W of Andria (100440 inhabitants)
99 Km SW of Manfredonia (57279 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
Bulletin
Rev1000 		ML 1.4 2021-05-31
14:24:06		 40.9175 15.2033 13 2021-12-29
11:12:06		 Bollettino Sismico Italiano INGV 91644651
Reviewed
Rev100 		ML 1.4 2021-05-31
14:24:06		 40.9202 15.1882 13 2021-05-31
14:30:22		 Sala Sismica INGV-Roma 90664501
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-31 14:24:06 ± 0.07
Latitude 40.9175 ± 0.0036
Longitude 15.2033 ± 0.0048
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91644651

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 355
Semi-minor axis of confidence ellipse (meter) 335
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) 360.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0.00899
Epicentral distance of station farthest from the epicenter (degree) 0.42538
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 90664501
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-31 14:30:22

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 91644651
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-21 08:15:12
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MRLC.HHE. 2021-05-31T14:24:17.02 0.3 undecidable manual S 127 29.9478 96 0.2 69
IX.COL3.HHZ.02 2021-05-31T14:24:16.12 0.3 undecidable manual S 157 27.6501 97 -0.12 70
IV.PSB1.HNE. 2021-05-31T14:24:15.32 0.6 undecidable manual P 316 47.2194 93 0.26 45
IX.MNT3.HHZ.02 2021-05-31T14:24:14.05 0.3 undecidable manual S 242 18.7701 105 0.16 72
IV.VULT.HHN. 2021-05-31T14:24:13.03 0.1 undecidable manual P 83 34.8429 95 -0.13 92
IX.CLT3.HHZ.02 2021-05-31T14:24:13.64 0.6 undecidable manual S 95 16.9719 109 0.22 47
IX.SSB3.HNZ.02 2021-05-31T14:24:13.92 0.3 undecidable manual S 7 17.9709 107 0.22 70
IX.NSC3.HHZ.02 2021-05-31T14:24:12.00 0.3 undecidable manual S 221 10.3785 129 0.11 73
IV.CAFE.HHZ. 2021-05-31T14:24:12.10 0.3 undecidable manual S 13 12.5763 121 -0.27 70
IX.RDM3.HHZ.02 2021-05-31T14:24:12.33 0.3 undecidable manual P 99 28.2495 97 0.17 70
IV.MCRV.HHZ. 2021-05-31T14:24:12.66 0.3 undecidable manual S 191 15.2736 113 -0.35 69
IV.MRLC.HHE. 2021-05-31T14:24:12.32 0.6 undecidable manual P 127 29.9478 96 -0.08 47
IX.COL3.HHZ.02 2021-05-31T14:24:11.85 0.3 undecidable manual P 157 27.6501 97 -0.21 69
IX.SALI.HNZ.01 2021-05-31T14:24:11.05 0.3 undecidable manual S 305 2.3976 167 0.3 70
IX.RSF3.HHE.02 2021-05-31T14:24:10.75 0.1 undecidable manual S 336 5.6943 150 -0.33 94
IX.MNT3.HHZ.02 2021-05-31T14:24:10.80 0.1 undecidable manual P 242 18.7701 105 0.09 97
IX.LIO3.HNZ.02 2021-05-31T14:24:10.60 0.3 undecidable manual S 220 2.997 164 -0.19 73
IX.CLT3.HHZ.02 2021-05-31T14:24:10.65 0.3 undecidable manual P 95 16.9719 109 0.21 71
IV.SNAL.HHZ. 2021-05-31T14:24:10.88 0.3 undecidable manual S 29 0.999 174 0.19 72
IX.SNR3.HNZ. 2021-05-31T14:24:10.89 0.1 undecidable manual P 183 20.1687 103 -0.03 96
IX.SSB3.HNZ.02 2021-05-31T14:24:10.51 0.3 undecidable manual P 7 17.9709 107 -0.08 72
IV.MCRV.HHZ. 2021-05-31T14:24:10.00 0.3 undecidable manual P 191 15.2736 113 -0.2 71
IX.SALI.HNZ.01 2021-05-31T14:24:09.04 0.1 undecidable manual P 305 2.3976 167 0.14 98
IX.NSC3.HHZ.02 2021-05-31T14:24:09.76 0.1 undecidable manual P 221 10.3785 129 0.21 96
IV.CAFE.HHZ. 2021-05-31T14:24:09.76 0.3 undecidable manual P 13 12.5763 121 -0.07 73
IX.RSF3.HHE.02 2021-05-31T14:24:08.82 0.3 undecidable manual P 336 5.6943 150 -0.26 71
IX.LIO3.HNZ.02 2021-05-31T14:24:08.88 0.1 undecidable manual P 220 2.997 164 -0.04 100
IV.SNAL.HHZ. 2021-05-31T14:24:08.92 0.3 undecidable manual P 29 0.999 174 0.06 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CAFE.HHE. ML:1.4 0.0002465 1.5 AML other m 2021-05-31T14:24:13.85
IV.MCRV.HHN. ML:1.5 0.00027 0.12 AML other m 2021-05-31T14:24:13.25
IV.MCRV.HHE. ML:1.5 0.0002635 0.34 AML other m 2021-05-31T14:24:13.25
IX.MNT3.HHN.02 ML:1.9 0.0006185 0.1 AML other m 2021-05-31T14:24:14.57
IX.MNT3.HHE.02 ML:1.4 0.00018099999999999998 0.2 AML other m 2021-05-31T14:24:14.66
IX.CLT3.HHE.02 ML:1.4 0.00018099999999999998 1.72 AML other m 2021-05-31T14:24:14.11
IV.CAFE.HHN. ML:1.1 0.000123 0.42 AML other m 2021-05-31T14:24:15.25
IX.CLT3.HHN.02 ML:1.4 0.000209 0.22 AML other m 2021-05-31T14:24:15.85
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