Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 20-02-2021 and time 14:58:01 (Italy) in region 2 km W Rocca San Felice (AV)

A magnitude ML 1.5 earthquake occured in region: 2 km W Rocca San Felice (AV), on

  • 20-02-2021 13:58:01 (UTC)
  • 20-02-2021 14:58:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.9520, 15.1400 at 14 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
Rocca San Felice AV 2 851 851
Torella dei Lombardi AV 2 2144 2995
Sant'Angelo dei Lombardi AV 4 4250 7245
Villamaina AV 5 995 8240
Guardia Lombardi AV 6 1718 9958
Frigento AV 8 3780 13738
Sturno AV 8 3080 16818
Gesualdo AV 8 3516 20334
Castelfranci AV 9 2041 22375
Nusco AV 9 4203 26578
Paternopoli AV 9 2384 28962
Lioni AV 9 6201 35163
Morra De Sanctis AV 9 1297 36460
Carife AV 10 1408 37868
Castel Baronia AV 11 1129 38997
Montemarano AV 12 2851 41848
Fontanarosa AV 13 3170 45018
San Nicola Baronia AV 13 771 45789
Luogosano AV 13 1187 46976
Cassano Irpino AV 13 982 47958
Castelvetere sul Calore AV 13 1615 49573
Trevico AV 13 993 50566
Vallata AV 13 2714 53280
Flumeri AV 14 2963 56243
Sant'Angelo all'Esca AV 14 801 57044
San Sossio Baronia AV 14 1643 58687
San Mango sul Calore AV 14 1185 59872
Bagnoli Irpino AV 14 3217 63089
Teora AV 15 1537 64626
Grottaminarda AV 15 8137 72763
Andretta AV 16 1927 74690
Vallesaccarda AV 16 1386 76076
Montella AV 16 7780 83856
Mirabella Eclano AV 16 7684 91540
Taurasi AV 16 2377 93917
Lapio AV 17 1572 95489
Caposele AV 17 3483 98972
Melito Irpino AV 18 1920 100892
Chiusano di San Domenico AV 19 2277 103169
Villanova del Battista AV 19 1690 104859
Conza della Campania AV 20 1373 106232
Calabritto AV 20 2391 108623

Municipalities with at least 50000 inhabitants

An earthquake occurred to
29 Km E of Avellino (54857 inhabitants)
36 Km SE of Benevento (60091 inhabitants)
40 Km NE of Battipaglia (50786 inhabitants)
44 Km NE of Salerno (135261 inhabitants)
46 Km NE of Cava de' Tirreni (53659 inhabitants)
56 Km E of Scafati (50787 inhabitants)
62 Km E of Castellammare di Stabia (66466 inhabitants)
65 Km E of Acerra (59573 inhabitants)
66 Km NW of Potenza (67122 inhabitants)
66 Km SW of Foggia (151991 inhabitants)
68 Km E of Portici (55274 inhabitants)
68 Km E of Torre del Greco (86275 inhabitants)
69 Km E of Ercolano (53709 inhabitants)
69 Km E of Caserta (76326 inhabitants)
70 Km E of Afragola (65057 inhabitants)
72 Km E of Casoria (77642 inhabitants)
73 Km W of Cerignola (58396 inhabitants)
76 Km E of Napoli (974074 inhabitants)
78 Km E of Aversa (53047 inhabitants)
79 Km E of Giugliano in Campania (122974 inhabitants)
80 Km E of Marano di Napoli (59874 inhabitants)
84 Km S of San Severo (53905 inhabitants)
89 Km E of Pozzuoli (81661 inhabitants)
100 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 1.5 2021-02-20
13:58:01		 40.9523 15.1398 14 2021-07-12
16:54:59		 Bollettino Sismico Italiano INGV 87374681
Reviewed
Rev100 		ML 1.5 2021-02-20
13:58:01		 40.9552 15.1352 13 2021-02-20
14:32:37		 Sala Sismica INGV-Roma 87325681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-20 13:58:01 ± 0.08
Latitude 40.9523 ± 0.0027
Longitude 15.1398 ± 0.0048
Depth (km) 14 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87374681

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 419
Semi-minor axis of confidence ellipse (meter) 182
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 288
Circular confidence region, given by single value of horizontal uncertainty (meter) 420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 66
Number of associated phases, regardless of their use for origin computation 30
Number of defining phases 30
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.19
Epicentral distance of station closest to the epicenter (degree) 0.02968
Epicentral distance of station farthest from the epicenter (degree) 0.41189
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 87374681
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-22 09:02:38

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 16
Type of magnitude ML
Reference to an origin 87325681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-20 14:32:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IX.CMP3.HNE.02 2021-02-20T13:58:13.12 0.3 undecidable manual S 189 33.744 98 0.32 68
IV.MRLC.HHE. 2021-02-20T13:58:13.26 0.3 undecidable manual S 126 36.4413 97 -0.27 67
IX.COL3.HHE.02 2021-02-20T13:58:12.58 0.3 undecidable manual S 151 33.4443 98 -0.17 69
IV.SGTA.HHZ. 2021-02-20T13:58:11.02 0.3 undecidable manual S 43 27.6501 101 -0.19 70
IV.SGO.HHE. 2021-02-20T13:58:10.16 0.3 undecidable manual P 162 45.7209 95 0.39 65
IV.MRLC.HHE. 2021-02-20T13:58:08.38 0.3 undecidable manual P 126 36.4413 97 0.02 71
IV.MCRV.HHZ. 2021-02-20T13:58:08.83 0.3 undecidable manual S 173 18.9699 111 -0.15 71
IX.SSB3.HNZ. 2021-02-20T13:58:08.39 0.3 undecidable manual S 28 15.873 118 0.17 71
IX.LGS3.HNE.01 2021-02-20T13:58:07.60 0.3 undecidable manual S 287 13.0758 125 0.01 74
IV.CAFE.HHZ. 2021-02-20T13:58:07.39 0.3 undecidable manual S 44 11.6772 130 0.1 73
IX.COL3.HHE.02 2021-02-20T13:58:07.70 0.3 undecidable manual P 151 33.4443 98 -0.21 68
IX.NSC3.HNE.02 2021-02-20T13:58:07.37 0.3 undecidable manual S 187 11.7771 129 0.05 74
IV.SGTA.HHZ. 2021-02-20T13:58:07.21 0.3 undecidable manual P 43 27.6501 101 0.19 70
IX.CMP3.HNE.02 2021-02-20T13:58:07.88 0.3 undecidable manual P 189 33.744 98 -0.06 71
IV.MRB1.HHZ. 2021-02-20T13:58:06.27 0.6 undecidable manual P 323 23.754 105 -0.16 47
IX.CLT3.HHZ.02 2021-02-20T13:58:06.75 0.3 undecidable manual P 104 22.8549 106 0.46 67
IX.SALI.HNE.01 2021-02-20T13:58:06.35 0.3 undecidable manual S 126 4.1958 160 0.22 72
IX.LIO3.HHE.02 2021-02-20T13:58:06.48 0.3 undecidable manual S 151 6.993 147 0.01 75
IV.SNAL.HHZ. 2021-02-20T13:58:06.48 0.3 undecidable manual S 117 6.4935 149 0.08 74
IX.SSB3.HNZ. 2021-02-20T13:58:05.31 0.1 undecidable manual P 28 15.873 118 0.01 98
IX.RSF3.HNZ.02 2021-02-20T13:58:05.49 0.3 undecidable manual S 66 3.2967 164 -0.56 67
IX.MNT3.HNZ.01 2021-02-20T13:58:05.56 0.3 undecidable manual P 221 16.9719 115 0.11 72
IV.MCRV.HHZ. 2021-02-20T13:58:05.70 0.1 undecidable manual P 173 18.9699 111 -0.03 97
IX.LIO3.HHE.02 2021-02-20T13:58:04.20 0.1 undecidable manual P 151 6.993 147 -0.08 99
IX.NSC3.HNE.02 2021-02-20T13:58:04.89 0.3 undecidable manual P 187 11.7771 129 0.12 73
IV.SNAL.HHZ. 2021-02-20T13:58:04.25 0.1 negative manual P 117 6.4935 149 0.01 100
IX.LGS3.HNE.01 2021-02-20T13:58:04.63 0.3 undecidable manual P 287 13.0758 125 -0.3 70
IX.SALI.HNE.01 2021-02-20T13:58:04.14 0.1 undecidable manual P 126 4.1958 160 0.06 99
IV.CAFE.HHZ. 2021-02-20T13:58:04.81 0.1 positive manual P 44 11.6772 130 0.05 98
IX.RSF3.HNZ.02 2021-02-20T13:58:03.76 0.3 undecidable manual P 66 3.2967 164 -0.28 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SNAL.HHN. ML:1.7 0.000586 0.14 AML other m 2021-02-20T13:58:06.65
IV.SNAL.HNN. ML:1.7 0.000565 0.14 AML other m 2021-02-20T13:58:06.66
IV.SNAL.HNE. ML:1.8 0.0006778441 0.256 AML other m 2021-02-20T13:58:06.83
IV.SNAL.HHE. ML:1.8 0.0007029315499999999 0.2752 AML other m 2021-02-20T13:58:06.83
IV.CAFE.HNE. ML:1.5 0.0002821785 0.1984 AML other m 2021-02-20T13:58:07.86
IV.CAFE.HHE. ML:1.5 0.00030747795 0.1984 AML other m 2021-02-20T13:58:07.86
IV.MCRV.HHE. ML:1.8 0.000404 0.12 AML other m 2021-02-20T13:58:09.13
IV.MCRV.HHN. ML:2.0 0.000743 0.12 AML other m 2021-02-20T13:58:09.20
IV.CAFE.HHN. ML:1.5 0.00030199999999999997 1.58 AML other m 2021-02-20T13:58:11.20
IV.CAFE.HNN. ML:1.5 0.0003135703 1.5712 AML other m 2021-02-20T13:58:11.20
IV.MRB1.HNE. ML:1.4 0.00013364804999999998 0.8064 AML other m 2021-02-20T13:58:12.34
IV.MRB1.HHE. ML:1.1 0.00007403376 0.3776 AML other m 2021-02-20T13:58:13.81
IV.MRB1.HHN. ML:1.3 0.00010832990000000001 0.4032 AML other m 2021-02-20T13:58:13.67
IV.SGTA.HNE. ML:1.4 0.00011104846 0.5504 AML other m 2021-02-20T13:58:14.44
IV.SGTA.HHE. ML:1.1 0.0000636 1.48 AML other m 2021-02-20T13:58:14.19
IV.SGTA.HHN. ML:1.0 0.000046075955 0.2432 AML other m 2021-02-20T13:58:14.57
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