Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.2 on date 16-07-2021 and time 22:39:46 (Italy) in region 3 km SW Ariano Irpino (AV)

A magnitude ML 1.2 earthquake occured in region: 3 km SW Ariano Irpino (AV), on

  • 16-07-2021 20:39:46 (UTC)
  • 16-07-2021 22:39:46 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.1340, 15.0760 at 21 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
Ariano Irpino AV 3 22700 22700
Melito Irpino AV 4 1920 24620
Bonito AV 7 2448 27068
Villanova del Battista AV 7 1690 28758
Grottaminarda AV 7 8137 36895
Montecalvo Irpino AV 8 3725 40620
Flumeri AV 9 2963 43583
Zungoli AV 11 1099 44682
Sant'Arcangelo Trimonte BN 12 573 45255
Apice BN 12 5686 50941
Mirabella Eclano AV 12 7684 58625
Buonalbergo BN 13 1730 60355
Casalbore AV 13 1800 62155
Sturno AV 13 3080 65235
San Sossio Baronia AV 13 1643 66878
San Nicola Baronia AV 13 771 67649
Fontanarosa AV 13 3170 70819
Castel Baronia AV 14 1129 71948
Frigento AV 14 3780 75728
Savignano Irpino AV 14 1140 76868
Gesualdo AV 14 3516 80384
Greci AV 15 691 81075
Sant'Angelo all'Esca AV 16 801 81876
Monteleone di Puglia FG 16 1021 82897
Carife AV 16 1408 84305
Paduli BN 16 3978 88283
Trevico AV 16 993 89276
Venticano AV 16 2537 91813
Ginestra degli Schiavoni BN 17 476 92289
Vallesaccarda AV 17 1386 93675
Taurasi AV 17 2377 96052
Luogosano AV 18 1187 97239
Paternopoli AV 18 2384 99623
Villamaina AV 18 995 100618
Anzano di Puglia FG 18 1284 101902
Vallata AV 18 2714 104616
Castelfranco in Miscano BN 18 916 105532
Torre Le Nocelle AV 19 1324 106856
Calvi BN 19 2682 109538
Pietradefusi AV 19 2348 111886
Scampitella AV 19 1234 113120
Panni FG 19 804 113924
Montaguto AV 20 423 114347
Montemiletto AV 20 5313 119660
Lapio AV 20 1572 121232

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km E of Benevento (60091 inhabitants)
34 Km NE of Avellino (54857 inhabitants)
54 Km SW of Foggia (151991 inhabitants)
57 Km NE of Salerno (135261 inhabitants)
57 Km NE of Cava de' Tirreni (53659 inhabitants)
59 Km N of Battipaglia (50786 inhabitants)
63 Km E of Caserta (76326 inhabitants)
63 Km E of Acerra (59573 inhabitants)
63 Km NE of Scafati (50787 inhabitants)
67 Km SW of San Severo (53905 inhabitants)
68 Km E of Afragola (65057 inhabitants)
70 Km NE of Portici (55274 inhabitants)
70 Km NE of Castellammare di Stabia (66466 inhabitants)
71 Km E of Casoria (77642 inhabitants)
71 Km W of Cerignola (58396 inhabitants)
71 Km NE of Torre del Greco (86275 inhabitants)
71 Km NE of Ercolano (53709 inhabitants)
75 Km E of Aversa (53047 inhabitants)
77 Km E of Napoli (974074 inhabitants)
77 Km E of Giugliano in Campania (122974 inhabitants)
79 Km E of Marano di Napoli (59874 inhabitants)
82 Km NW of Potenza (67122 inhabitants)
89 Km E of Pozzuoli (81661 inhabitants)
89 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
Reviewed
Rev100 		ML 1.2 2021-07-16
20:39:46		 41.1345 15.0762 21 2021-07-16
20:52:43		 Sala Sismica INGV-Roma 92844181
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-16 20:39:46 ± 0.12
Latitude 41.1345 ± 0.0054
Longitude 15.0762 ± 0.0096
Depth (km) 21 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 92844181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 766
Semi-minor axis of confidence ellipse (meter) 468
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 241
Circular confidence region, given by single value of horizontal uncertainty (meter) 770.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 98
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.07824
Epicentral distance of station farthest from the epicenter (degree) 0.35883
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 92844181
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-16 20:52:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MCRV.HHZ. 2021-07-16T20:40:00.40 0.3 undecidable manual S 169 39.8268 110 -0.1 73
IX.MNT3.HNE.02 2021-07-16T20:39:59.34 0.3 undecidable manual S 190 33.5442 114 0.4 70
IX.NSC3.HNE.02 2021-07-16T20:39:58.85 0.3 undecidable manual S 173 32.1456 115 0.24 73
IV.SNAL.HHZ. 2021-07-16T20:39:57.13 0.3 undecidable manual S 154 25.752 122 0.03 77
IV.PSB1.HHZ. 2021-07-16T20:39:56.73 0.3 undecidable manual S 294 24.2535 124 -0.05 76
IV.CAFE.HHZ. 2021-07-16T20:39:55.37 0.3 undecidable manual S 131 17.871 134 -0.09 76
IV.MCRV.HHZ. 2021-07-16T20:39:54.83 0.3 undecidable manual P 169 39.8268 110 0.07 74
IV.BIOG.HNZ. 2021-07-16T20:39:54.32 0.6 undecidable manual S 33 8.6802 155 0.31 50
IX.MNT3.HNE.02 2021-07-16T20:39:53.93 0.1 undecidable manual P 190 33.5442 114 0.07 100
IV.MOCO.HNZ. 2021-07-16T20:39:53.12 0.1 undecidable manual P 15 27.0507 121 0.15 99
IX.NSC3.HNE.02 2021-07-16T20:39:53.61 0.1 undecidable manual P 173 32.1456 115 -0.06 100
IV.MRB1.HHZ. 2021-07-16T20:39:53.79 0.3 undecidable manual S 262 9.0798 154 -0.28 74
IV.PSB1.HHZ. 2021-07-16T20:39:52.72 0.1 undecidable manual P 294 24.2535 124 0.11 100
IV.SNAL.HHZ. 2021-07-16T20:39:52.60 0.1 undecidable manual P 154 25.752 122 -0.2 98
IV.BIOG.HNZ. 2021-07-16T20:39:51.36 0.3 undecidable manual P 33 8.6802 155 0.34 74
IV.CAFE.HHZ. 2021-07-16T20:39:51.63 0.1 undecidable manual P 131 17.871 134 -0.22 99
IV.MRB1.HHZ. 2021-07-16T20:39:50.69 0.1 undecidable manual P 262 9.0798 154 -0.36 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MRB1.HHE. ML:1.3 0.00014450000000000002 0.26 AML other m 2021-07-16T20:39:53.93
IV.MRB1.HHN. ML:1.4 0.000191 1.6 AML other m 2021-07-16T20:39:54.97
IV.CAFE.HHE. ML:1.3 0.00010264999999999999 0.26 AML other m 2021-07-16T20:39:55.61
IV.CAFE.HHN. ML:1.0 0.000054749999999999996 0.32 AML other m 2021-07-16T20:39:55.60
IV.MCRV.HHN. ML:1.1 0.00003255 0.1 AML other m 2021-07-16T20:40:00.87
IV.MCRV.HHE. ML:0.7 0.0000165 0.18 AML other m 2021-07-16T20:40:01.08
IV.MRB1.HNE. ML:1.3 0.00015522340000000002 0.3328 AML other m 2021-07-16T20:39:53.00
IV.MRB1.HNN. ML:1.5 0.00020851455000000003 0.4224 AML other m 2021-07-16T20:39:53.77
IV.CAFE.HNE. ML:1.3 0.000103194155 0.2816 AML other m 2021-07-16T20:39:55.64
IV.PSB1.HHE. ML:0.9 0.00003538993 0.2048 AML other m 2021-07-16T20:39:56.80
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