Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.7 on date 09-05-2021 and time 16:40:51 (UTC) in region 2 km NW Vallesaccarda (AV)

A magnitude ML 1.7 earthquake occured in region: 2 km NW Vallesaccarda (AV), on

  • 09-05-2021 16:40:51 (UTC)
  • 09-05-2021 18:40:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.0830, 15.2430 at 19 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
Vallesaccarda AV 2 1386 1386
San Sossio Baronia AV 4 1643 3029
Trevico AV 4 993 4022
San Nicola Baronia AV 4 771 4793
Scampitella AV 5 1234 6027
Vallata AV 5 2714 8741
Castel Baronia AV 6 1129 9870
Anzano di Puglia FG 6 1284 11154
Zungoli AV 6 1099 12253
Carife AV 7 1408 13661
Flumeri AV 8 2963 16624
Villanova del Battista AV 8 1690 18314
Monteleone di Puglia FG 9 1021 19335
Accadia FG 11 2376 21711
Sturno AV 13 3080 24791
Bisaccia AV 14 3831 28622
Sant'Agata di Puglia FG 14 1959 30581
Frigento AV 14 3780 34361
Guardia Lombardi AV 14 1718 36079
Ariano Irpino AV 15 22700 58779
Grottaminarda AV 15 8137 66916
Lacedonia AV 16 2340 69256
Panni FG 16 804 70060
Melito Irpino AV 16 1920 71980
Rocca San Felice AV 16 851 72831
Gesualdo AV 17 3516 76347
Savignano Irpino AV 17 1140 77487
Morra De Sanctis AV 18 1297 78784
Villamaina AV 18 995 79779
Andretta AV 18 1927 81706
Sant'Angelo dei Lombardi AV 18 4250 85956
Rocchetta Sant'Antonio FG 18 1875 87831
Montaguto AV 19 423 88254
Torella dei Lombardi AV 19 2144 90398
Greci AV 20 691 91089
Fontanarosa AV 20 3170 94259
Deliceto FG 20 3828 98087

Municipalities with at least 50000 inhabitants

An earthquake occurred to
39 Km E of Benevento (60091 inhabitants)
42 Km E of Avellino (54857 inhabitants)
49 Km SW of Foggia (151991 inhabitants)
57 Km NE of Battipaglia (50786 inhabitants)
59 Km W of Cerignola (58396 inhabitants)
61 Km NE of Salerno (135261 inhabitants)
62 Km NE of Cava de' Tirreni (53659 inhabitants)
68 Km S of San Severo (53905 inhabitants)
68 Km NW of Potenza (67122 inhabitants)
71 Km NE of Scafati (50787 inhabitants)
75 Km E of Acerra (59573 inhabitants)
76 Km E of Caserta (76326 inhabitants)
77 Km NE of Castellammare di Stabia (66466 inhabitants)
80 Km E of Portici (55274 inhabitants)
80 Km E of Afragola (65057 inhabitants)
81 Km E of Torre del Greco (86275 inhabitants)
81 Km E of Ercolano (53709 inhabitants)
82 Km E of Casoria (77642 inhabitants)
83 Km SW of Manfredonia (57279 inhabitants)
88 Km E of Napoli (974074 inhabitants)
88 Km E of Aversa (53047 inhabitants)
89 Km E of Giugliano in Campania (122974 inhabitants)
90 Km W of Andria (100440 inhabitants)
91 Km E of Marano di Napoli (59874 inhabitants)
91 Km W of Barletta (94814 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 1.7 2021-05-09
16:40:51		 41.0827 15.2427 19 2021-12-29
11:12:05		 Bollettino Sismico Italiano INGV 91308431
Reviewed
Rev100 		ML 1.7 2021-05-09
16:40:51		 41.0922 15.2472 15 2021-05-09
17:00:37		 Sala Sismica INGV-Roma 89946741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-05-09 16:40:51 ± 0.09
Latitude 41.0827 ± 0.0045
Longitude 15.2427 ± 0.0060
Depth (km) 19 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 91308431

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 523
Semi-minor axis of confidence ellipse (meter) 203
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 105
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 33
Number of associated phases, regardless of their use for origin computation 45
Number of defining phases 44
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.04141
Number of stations at which the event was observed 31
Number of stations from which data was used for origin computation 30
Magnitudes information

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 52
Type of magnitude ML
Reference to an origin 91308431
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-06-15 05:00:21

ML:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 38
Type of magnitude ML
Reference to an origin 89946741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-05-09 17:00:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MNTT.EHZ. 2021-05-09T16:41:54.79 3.0 undecidable manual Sn -2.54 0
IV.AMUR.HHZ. 2021-05-09T16:41:11.22 0.3 undecidable manual P 99 115.5954 94 0.51 56
IV.SACR.HHZ. 2021-05-09T16:41:09.02 0.3 undecidable manual S 308 56.7987 100 -0.2 67
IV.MSAG.HHZ. 2021-05-09T16:41:07.63 0.6 undecidable manual P 38 89.1441 96 0.98 33
IV.CAPA.HHZ. 2021-05-09T16:41:06.85 0.3 undecidable manual S 80 48.7179 102 -0.26 69
IV.SGRT.HHZ. 2021-05-09T16:41:06.16 0.3 undecidable manual P 29 85.4478 96 0.09 66
IV.MRLC.HHZ. 2021-05-09T16:41:05.70 0.6 undecidable manual S 150 41.625 105 0.42 44
IV.MRVN.HHZ. 2021-05-09T16:41:05.07 0.3 undecidable manual P 91 79.7646 97 -0.13 66
IV.APRC.HHE. 2021-05-09T16:41:04.75 0.3 undecidable manual P 18 78.8655 97 -0.32 63
OT.OT07.EHE. 2021-05-09T16:41:04.37 0.6 undecidable manual P 33 71.7726 98 0.39 42
IV.BSSO.HHZ. 2021-05-09T16:41:04.35 0.3 undecidable manual P 314 74.5698 97 -0.06 67
IV.PSB1.HHZ. 2021-05-09T16:41:04.80 0.3 undecidable manual S 294 39.3273 106 0.13 72
IV.MELA.HHZ. 2021-05-09T16:41:03.50 0.3 undecidable manual P 352 69.7746 98 -0.18 66
OT.OT05.EHZ. 2021-05-09T16:41:03.34 0.3 undecidable manual P 25 70.5738 98 -0.47 63
IV.MCRV.HHN. 2021-05-09T16:41:03.33 0.1 undecidable manual S 191 33.8439 109 0.04 98
IV.VULT.HHZ. 2021-05-09T16:41:03.80 0.3 undecidable manual S 114 34.3434 109 0.39 67
IX.NSC3.HHZ.02 2021-05-09T16:41:01.44 0.3 undecidable manual S 201 28.0497 114 -0.4 68
IV.SACR.HHZ. 2021-05-09T16:41:01.85 0.3 undecidable manual P 308 56.7987 100 0.15 69
IV.CAPA.HHZ. 2021-05-09T16:41:00.01 0.3 undecidable manual P 80 48.7179 102 -0.47 65
IV.BIOG.HNN. 2021-05-09T16:41:00.00 0.1 undecidable manual S 325 15.9729 133 0.87 80
IX.SALI.HNZ.01 2021-05-09T16:41:00.10 0.3 undecidable manual S 197 17.7711 129 0.6 66
IV.PSB1.HHZ. 2021-05-09T16:40:59.11 0.1 negative manual P 294 39.3273 106 0.04 97
IV.MRLC.HHZ. 2021-05-09T16:40:59.39 0.1 negative manual P 150 41.625 105 -0.03 97
IV.SNAL.HHZ. 2021-05-09T16:40:59.60 0.3 undecidable manual S 189 17.6712 130 0.12 74
IX.SNR3.HHE.02 2021-05-09T16:40:59.03 0.1 positive manual P 186 38.7279 106 0.05 97
IX.VDS3.HNN.01 2021-05-09T16:40:58.82 0.3 undecidable manual P 158 40.9257 105 -0.5 66
IV.VULT.HHZ. 2021-05-09T16:40:58.28 0.1 negative manual P 114 34.3434 109 -0.06 98
IV.MCRV.HHN. 2021-05-09T16:40:58.17 0.1 negative manual P 191 33.8439 109 -0.1 96
IX.RSF3.HHE.02 2021-05-09T16:40:58.40 0.3 undecidable manual S 203 14.2746 137 -0.42 70
IX.CLT3.HHZ.02 2021-05-09T16:40:57.36 0.1 negative manual P 146 24.0537 119 0.46 90
IX.SSB3.HNZ.02 2021-05-09T16:40:57.00 0.3 undecidable manual S 248 1.1988 176 -0.37 72
IV.SGTA.HHZ. 2021-05-09T16:40:57.90 0.3 undecidable manual S 60 11.7771 143 -0.49 69
IV.MRB1.HHZ. 2021-05-09T16:40:57.17 0.1 undecidable manual P 281 23.3544 120 0.37 93
IX.NSC3.HHZ.02 2021-05-09T16:40:57.54 0.1 positive manual P 201 28.0497 114 0.1 98
IV.CAFE.HHZ. 2021-05-09T16:40:57.50 0.3 undecidable manual S 185 6.0939 159 -0.15 75
IX.MNT3.HHE.02 2021-05-09T16:40:57.57 0.6 undecidable manual P 216 33.6441 110 -0.67 41
IX.LIO3.HNZ.02 2021-05-09T16:40:56.46 0.3 undecidable manual P 194 21.2676 123 -0.06 74
IX.SALI.HNZ.01 2021-05-09T16:40:56.22 0.1 undecidable manual P 197 17.7711 129 0.13 99
IV.BIOG.HNN. 2021-05-09T16:40:56.43 0.1 negative manual P 325 15.9729 133 0.56 90
IV.SNAL.HHZ. 2021-05-09T16:40:56.02 0.1 positive manual P 189 17.6712 130 -0.06 100
IX.AND3.HNE.02 2021-05-09T16:40:56.99 0.3 undecidable manual P 156 18.5703 128 0.8 60
IX.RSF3.HHE.02 2021-05-09T16:40:55.54 0.3 undecidable manual P 203 14.2746 137 -0.16 74
IV.SGTA.HHZ. 2021-05-09T16:40:55.02 0.1 positive manual P 60 11.7771 143 -0.43 94
IX.SSB3.HNZ.02 2021-05-09T16:40:54.43 0.3 undecidable manual P 248 1.1988 176 -0.43 71
IV.CAFE.HHZ. 2021-05-09T16:40:54.66 0.1 undecidable manual P 185 6.0939 159 -0.36 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MRB1.HNN. ML:2.0 0.00047723158 0.9888 AML other m 2021-05-09T16:40:57.72
IV.SGTA.HHE. ML:2.1 0.001001 0.3 AML other m 2021-05-09T16:40:59.65
IV.SGTA.HNE. ML:2.1 0.0009184999999999999 0.3 AML other m 2021-05-09T16:40:59.65
IV.SNAL.HHE. ML:1.6 0.0002475 1.74 AML other m 2021-05-09T16:40:59.07
IV.SNAL.HNE. ML:1.6 0.00025 1.74 AML other m 2021-05-09T16:40:59.07
IV.SGTA.HNN. ML:1.9 0.00062933355 0.2176 AML other m 2021-05-09T16:40:59.95
IV.SGTA.HHN. ML:1.9 0.0006353585500000001 0.192 AML other m 2021-05-09T16:40:59.95
IV.CAFE.HNN. ML:1.7 0.000432 0.24 AML other m 2021-05-09T16:40:59.86
IV.CAFE.HHN. ML:1.7 0.0004205 0.26 AML other m 2021-05-09T16:40:59.98
IV.CAFE.HHE. ML:1.7 0.0004398484 1.68 AML other m 2021-05-09T16:40:59.98
IV.CAFE.HNE. ML:1.7 0.00043908485 1.552 AML other m 2021-05-09T16:40:59.99
IV.SNAL.HNN. ML:1.7 0.00029307755 0.3072 AML other m 2021-05-09T16:41:00.77
IV.SNAL.HHN. ML:1.7 0.000292 0.3 AML other m 2021-05-09T16:41:00.63
IV.MRB1.HHE. ML:1.8 0.0003529808 0.32 AML other m 2021-05-09T16:41:02.30
IV.MRB1.HHN. ML:1.8 0.00032363190000000004 0.2688 AML other m 2021-05-09T16:41:02.44
IX.CLT3.HNE.01 ML:1.8 0.00030542377 0.2304 AML other m 2021-05-09T16:41:03.17
IX.CLT3.HHE.02 ML:1.8 0.00030880025 0.256 AML other m 2021-05-09T16:41:03.17
IV.MRB1.HNE. ML:1.8 0.0002903433 1.4752 AML other m 2021-05-09T16:41:04.11
IV.VULT.HHE. ML:2.1 0.0004605 0.24 AML other m 2021-05-09T16:41:05.72
IV.VULT.HNE. ML:2.1 0.00045795275 0.2432 AML other m 2021-05-09T16:41:05.72
IV.VULT.HHN. ML:2.2 0.0005695 0.24 AML other m 2021-05-09T16:41:06.17
IV.VULT.HNN. ML:2.1 0.0005200000000000001 0.24 AML other m 2021-05-09T16:41:06.17
IV.MRLC.HHE. ML:1.3 0.000057268 0.3712 AML other m 2021-05-09T16:41:06.09
IV.PSB1.HHE. ML:1.5 0.00010200000000000001 0.16 AML other m 2021-05-09T16:41:06.39
IV.PSB1.HNE. ML:1.4 0.00008158455000000001 0.1664 AML other m 2021-05-09T16:41:06.31
IV.CAPA.HNE. ML:1.2 0.000047240775 0.0032 AML other m 2021-05-09T16:41:06.74
IX.CLT3.HNN.01 ML:1.8 0.00034021048499999993 1.7568 AML other m 2021-05-09T16:41:06.95
IX.CLT3.HHN.02 ML:1.8 0.00032 0.56 AML other m 2021-05-09T16:41:07.07
IV.MRLC.HHN. ML:1.3 0.0000664 0.5 AML other m 2021-05-09T16:41:08.26
IV.CAPA.HHE. ML:1.4 0.000064509855 0.1664 AML other m 2021-05-09T16:41:08.35
IV.PSB1.HHN. ML:1.3 0.00006095469 0.3328 AML other m 2021-05-09T16:41:08.77
IV.PSB1.HNN. ML:1.3 0.000057989990000000005 0.32 AML other m 2021-05-09T16:41:08.77
IV.CAPA.HHN. ML:1.5 0.000074697565 0.1664 AML other m 2021-05-09T16:41:09.21
IV.MRLC.HNN. ML:1.2 0.000049346595 1.488 AML other m 2021-05-09T16:41:09.14
IV.MRLC.HNE. ML:1.1 0.00003842642 1.5904 AML other m 2021-05-09T16:41:09.14
IV.CAPA.HNN. ML:1.2 0.000044702270000000005 0.2432 AML other m 2021-05-09T16:41:11.54
IV.SACR.HHN. ML:1.2 0.0000334504 0.3712 AML other m 2021-05-09T16:41:12.76
OT.OT05.EHE. ML:1.8 0.00009070000000000001 1.06 AML other m 2021-05-09T16:41:12.37
OT.OT05.EHN. ML:1.6 0.00005785 0.16 AML other m 2021-05-09T16:41:13.13
IV.MELA.HHN. ML:1.6 0.00006952414 0.2944 AML other m 2021-05-09T16:41:14.44
IV.MELA.HHE. ML:1.6 0.000065602175 0.2176 AML other m 2021-05-09T16:41:17.11
IV.MRVN.HHN. ML:1.5 0.00004255 0.26 AML other m 2021-05-09T16:41:17.47
IV.MRVN.HHE. ML:1.6 0.00005935 0.36 AML other m 2021-05-09T16:41:17.94
IV.SACR.HHE. ML:1.2 0.00002758526 0.2944 AML other m 2021-05-09T16:41:17.92
IV.SGRT.HHE. ML:2.0 0.00011180000000000001 0.28 AML other m 2021-05-09T16:41:19.91
IV.SGRT.HHN. ML:1.9 0.00010077067 0.1664 AML other m 2021-05-09T16:41:19.91
IV.MSAG.HHE. ML:1.5 0.000039099999999999995 0.42 AML other m 2021-05-09T16:41:21.79
IV.MSAG.HNE. ML:1.9 0.00009398929 0.4224 AML other m 2021-05-09T16:41:21.58
IV.MSAG.HNN. ML:2.1 0.000147072515 0.2304 AML other m 2021-05-09T16:41:22.70
IV.MSAG.HHN. ML:1.8 0.000062701505 0.2304 AML other m 2021-05-09T16:41:22.70
IV.AMUR.HHN. ML:1.7 0.0000386 1.72 AML other m 2021-05-09T16:41:26.08
IV.AMUR.HHE. ML:1.6 0.00003085 0.98 AML other m 2021-05-09T16:41:28.48
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