Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 18-02-2021 and time 22:23:42 (Italy) in region 2 km E Ospedaletto d'Alpinolo (AV)

A magnitude ML 1.6 earthquake occured in region: 2 km E Ospedaletto d'Alpinolo (AV), on

  • 18-02-2021 21:23:42 (UTC)
  • 18-02-2021 22:23:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.9400, 14.7670 at 8 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
Ospedaletto d'Alpinolo AV 2 2145 2145
Summonte AV 2 1583 3728
Capriglia Irpina AV 2 2398 6126
Mercogliano AV 3 12267 18393
Avellino AV 4 54857 73250
Grottolella AV 4 1869 75119
Montefredane AV 5 2297 77416
Sant'Angelo a Scala AV 5 730 78146
Atripalda AV 6 11020 89166
Pietrastornina AV 7 1553 90719
Monteforte Irpino AV 7 11467 102186
Manocalzati AV 7 3160 105346
Aiello del Sabato AV 7 3958 109304
Cesinali AV 7 2584 111888
Altavilla Irpina AV 8 4196 116084
Contrada AV 8 3053 119137
Prata di Principato Ultra AV 8 2944 122081
Pratola Serra AV 9 3764 125845
Forino AV 9 5384 131229
San Potito Ultra AV 9 1558 132787
Candida AV 9 1147 133934
Tufo AV 9 889 134823
Pannarano BN 10 2130 136953
Santo Stefano del Sole AV 10 2208 139161
Roccabascerana AV 10 2354 141515
Parolise AV 10 663 142178
San Michele di Serino AV 10 2530 144708
Arpaise BN 10 761 145469
Mugnano del Cardinale AV 10 5373 150842
Montefalcione AV 10 3359 154201
Sorbo Serpico AV 11 583 154784
Petruro Irpino AV 11 349 155133
Salza Irpina AV 11 772 155905
Quadrelle AV 11 1865 157770
Torrioni AV 11 549 158319
Moschiano AV 11 1673 159992
Santa Lucia di Serino AV 12 1402 161394
Santa Paolina AV 12 1256 162650
Sirignano AV 12 2933 165583
Ceppaloni BN 12 3415 168998
Chianche AV 12 475 169473
Taurano AV 13 1546 171019
Baiano AV 13 4718 175737
Chiusano di San Domenico AV 13 2277 178014
San Martino Valle Caudina AV 13 4884 182898
Serino AV 13 7034 189932
Quindici AV 13 1938 191870
Montoro AV 13 19671 211541
Lauro AV 13 3509 215050
Montefusco AV 13 1338 216388
Bracigliano SA 14 5565 221953
Solofra AV 14 12495 234448
Sperone AV 14 3706 238154
Avella AV 14 7890 246044
Pago del Vallo di Lauro AV 14 1830 247874
Volturara Irpina AV 14 3289 251163
Montemiletto AV 14 5313 256476
San Nazzaro BN 15 884 257360
Sant'Angelo a Cupolo BN 15 4325 261685
San Leucio del Sannio BN 15 3106 264791
Pietradefusi AV 15 2348 267139
Visciano NA 15 4454 271593
San Martino Sannita BN 15 1230 272823
Torre Le Nocelle AV 15 1324 274147
Cervinara AV 16 9658 283805
San Giorgio del Sannio BN 16 10022 293827
San Nicola Manfredi BN 16 3722 297549
Marzano di Nola AV 16 1727 299276
Lapio AV 16 1572 300848
Domicella AV 16 1862 302710
Siano SA 17 9979 312689
Mercato San Severino SA 17 22322 335011
Tufino NA 17 3776 338787
Calvi BN 17 2682 341469
Liveri NA 17 1607 343076
Montesarchio BN 17 13500 356576
Carbonara di Nola NA 17 2429 359005
Roccarainola NA 18 7082 366087
San Mango sul Calore AV 18 1185 367272
Venticano AV 18 2537 369809
Rotondi AV 18 3591 373400
Taurasi AV 18 2377 375777
Casamarciano NA 18 3289 379066
Apollosa BN 18 2658 381724
Comiziano NA 18 1814 383538
San Paolo Bel Sito NA 19 3513 387051
Castelvetere sul Calore AV 19 1615 388666
Castel San Giorgio SA 19 13702 402368
Sarno SA 19 31529 433897
Calvanico SA 19 1518 435415
Fisciano SA 19 13820 449235
Cicciano NA 19 12906 462141
Paolisi BN 19 2072 464213
Palma Campania NA 19 15978 480191
Montemarano AV 20 2851 483042
Bonea BN 20 1448 484490
Luogosano AV 20 1187 485677

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km NW of Avellino (54857 inhabitants)
21 Km S of Benevento (60091 inhabitants)
27 Km N of Cava de' Tirreni (53659 inhabitants)
29 Km N of Salerno (135261 inhabitants)
29 Km NE of Scafati (50787 inhabitants)
33 Km E of Acerra (59573 inhabitants)
36 Km NE of Castellammare di Stabia (66466 inhabitants)
37 Km E of Portici (55274 inhabitants)
38 Km E of Torre del Greco (86275 inhabitants)
38 Km E of Ercolano (53709 inhabitants)
38 Km E of Afragola (65057 inhabitants)
39 Km E of Caserta (76326 inhabitants)
40 Km E of Casoria (77642 inhabitants)
41 Km NW of Battipaglia (50786 inhabitants)
45 Km E of Napoli (974074 inhabitants)
47 Km E of Aversa (53047 inhabitants)
48 Km E of Giugliano in Campania (122974 inhabitants)
49 Km E of Marano di Napoli (59874 inhabitants)
58 Km E of Pozzuoli (81661 inhabitants)
87 Km SW of Foggia (151991 inhabitants)
94 Km W of Potenza (67122 inhabitants)
98 Km SW of San Severo (53905 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 1.6 2021-02-18
21:23:42		 40.9397 14.7667 8 2021-07-12
16:55:03		 Bollettino Sismico Italiano INGV 88409921
Reviewed
Rev100 		ML 1.6 2021-02-18
21:23:43		 40.9467 14.7622 8 2021-02-18
21:34:08		 Sala Sismica INGV-Roma 87285071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-02-18 21:23:42 ± 0.08
Latitude 40.9397 ± 0.0054
Longitude 14.7667 ± 0.0048
Depth (km) 8 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 88409921

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 526
Semi-minor axis of confidence ellipse (meter) 322
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 349
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 105
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 27
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) 0.02248
Epicentral distance of station farthest from the epicenter (degree) 0.62143
Number of stations at which the event was observed 23
Number of stations from which data was used for origin computation 23
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 87285071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-02-18 21:34:08

ML:1.6

Field Value
Value 1.6
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 88409921
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-04-18 18:02:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.VAGA.HHZ. 2021-02-18T21:23:55.48 0.3 undecidable manual P 320 68.9754 50 0.06 66
IV.VITU.HHZ. 2021-02-18T21:23:53.92 0.3 undecidable manual S 337 29.3484 104 0.5 65
IV.SACR.HNN. 2021-02-18T21:23:53.03 0.6 undecidable manual P 354 51.0156 50 0.38 43
IV.SGG.HHN. 2021-02-18T21:23:53.61 0.6 undecidable manual P 327 59.1963 50 -0.3 43
IV.PTRJ.HNN. 2021-02-18T21:23:52.75 0.6 undecidable manual P 337 51.1155 50 0.09 45
IV.MRB1.HHZ. 2021-02-18T21:23:51.52 0.6 undecidable manual S 40 26.3514 106 -0.92 37
IV.CAFE.HNE. 2021-02-18T21:23:51.41 0.3 undecidable manual P 76 40.5261 50 0.37 66
IV.MCRV.HHN. 2021-02-18T21:23:50.35 0.3 undecidable manual P 117 37.9287 50 -0.28 67
IX.LIO3.HHN.02 2021-02-18T21:23:50.04 0.1 undecidable manual P 98 35.0427 102 -0.05 94
IV.SNAL.HHZ. 2021-02-18T21:23:50.35 0.3 undecidable manual P 92 37.1295 50 -0.15 69
IX.LGS3.HNZ.01 2021-02-18T21:23:50.13 0.3 undecidable manual S 74 19.4694 111 -0.03 73
IV.OVO.HHE. 2021-02-18T21:23:50.05 0.3 undecidable manual P 248 33.4443 103 0.27 68
IV.CRTO.HHN. 2021-02-18T21:23:49.01 0.6 undecidable manual P 246 31.746 103 -0.44 44
IV.VBKN.HHZ. 2021-02-18T21:23:49.36 0.3 undecidable manual P 247 30.747 104 0.1 71
IX.RSF3.HNE.02 2021-02-18T21:23:49.98 0.3 undecidable manual P 85 34.4433 102 0 72
IV.VVDG.HHZ. 2021-02-18T21:23:49.80 0.1 undecidable manual P 248 30.9468 104 0.49 87
IV.VCRE.HHN. 2021-02-18T21:23:49.11 0.3 undecidable manual P 245 31.1466 104 -0.22 69
IX.NSC3.HNN.02 2021-02-18T21:23:49.30 0.3 undecidable manual P 109 31.5462 103 -0.12 70
IV.VTIR.HHZ. 2021-02-18T21:23:49.52 0.3 undecidable manual P 243 32.3454 103 -0.04 71
IV.PSB1.HNZ. 2021-02-18T21:23:49.23 0.3 undecidable manual P 7 31.6461 103 -0.22 69
IV.VITU.HHZ. 2021-02-18T21:23:48.38 0.3 undecidable manual P 337 29.3484 104 -0.6 63
IV.MRB1.HHZ. 2021-02-18T21:23:48.54 0.1 positive manual P 40 26.3514 106 0.12 94
IX.LGS3.HNZ.01 2021-02-18T21:23:47.66 0.1 undecidable manual P 74 19.4694 111 0.56 86
IX.BENI.HNZ.01 2021-02-18T21:23:47.45 0.3 undecidable manual P 1 21.0678 110 0.05 73
IV.NL9.EHZ. 2021-02-18T21:23:46.31 0.3 undecidable manual P 264 18.6702 112 -0.64 63
IT.AVL.HNZ. 2021-02-18T21:23:45.86 0.6 undecidable manual S 138 2.4975 161 0.17 49
IT.AVL.HNZ. 2021-02-18T21:23:44.47 0.1 undecidable manual P 138 2.4975 161 -0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MRB1.HNE. ML:1.6 0.00022574955 0.96 AML other m 2021-02-18T21:23:51.69
IV.MRB1.HHN. ML:1.7 0.00028597050000000004 0.5248 AML other m 2021-02-18T21:23:51.97
IV.MRB1.HNN. ML:1.8 0.00031833394999999996 0.5504 AML other m 2021-02-18T21:23:51.99
IV.MRB1.HHE. ML:1.4 0.0001551598 0.4608 AML other m 2021-02-18T21:23:52.35
IV.VITU.HNE. ML:1.6 0.000180726715 1.28 AML other m 2021-02-18T21:23:53.64
IV.VITU.HHE. ML:1.3 0.000108115865 0.9856 AML other m 2021-02-18T21:23:54.41
IV.VITU.HNN. ML:1.6 0.00019135940000000002 1.9584 AML other m 2021-02-18T21:23:53.64
IV.VITU.HHN. ML:1.6 0.0002012281 0.3584 AML other m 2021-02-18T21:23:55.08
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