Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 22-03-2021 and time 03:33:50 (UTC) in region 5 km NW Filignano (IS)

A magnitude ML 1.5 earthquake occured in region: 5 km NW Filignano (IS), on

  • 22-03-2021 03:33:50 (UTC)
  • 22-03-2021 04:33:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.5780, 14.0190 at 6 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
Filignano IS 5 648 648
Scapoli IS 6 680 1328
Acquafondata FR 7 263 1591
Viticuso FR 7 353 1944
Colli a Volturno IS 8 1349 3293
Rocchetta a Volturno IS 8 1113 4406
Pozzilli IS 8 2380 6786
Montaquila IS 8 2456 9242
San Biagio Saracinisco FR 9 349 9591
Conca Casale IS 9 200 9791
Vallerotonda FR 9 1581 11372
Castel San Vincenzo IS 9 516 11888
Pizzone IS 10 329 12217
Venafro IS 10 11280 23497
Fornelli IS 11 1909 25406
Cerro al Volturno IS 11 1281 26687
Macchia d'Isernia IS 13 1035 27722
Sant'Elia Fiumerapido FR 13 6166 33888
Cervaro FR 14 8109 41997
San Vittore del Lazio FR 14 2636 44633
Monteroduni IS 15 2264 46897
Picinisco FR 15 1218 48115
Acquaviva d'Isernia IS 15 425 48540
San Pietro Infine CE 15 944 49484
Villa Latina FR 16 1241 50725
Montenero Val Cocchiara IS 16 538 51263
Capriati a Volturno CE 16 1541 52804
Belmonte Castello FR 17 739 53543
Isernia IS 17 21842 75385
Sant'Agapito IS 17 1496 76881
Settefrati FR 17 728 77609
Alfedena AQ 18 864 78473
Sesto Campano IS 18 2388 80861
Rionero Sannitico IS 18 1118 81979
Cassino FR 18 36142 118121
Ciorlano CE 18 426 118547
Atina FR 19 4316 122863
Forlì del Sannio IS 19 675 123538
Scontrone AQ 19 574 124112
Mignano Monte Lungo CE 19 3250 127362
Fontegreca CE 19 811 128173
Longano IS 20 690 128863

Municipalities with at least 50000 inhabitants

An earthquake occurred to
62 Km NW of Caserta (76326 inhabitants)
69 Km N of Aversa (53047 inhabitants)
74 Km N of Giugliano in Campania (122974 inhabitants)
76 Km NW of Acerra (59573 inhabitants)
77 Km NW of Afragola (65057 inhabitants)
77 Km N of Marano di Napoli (59874 inhabitants)
78 Km N of Casoria (77642 inhabitants)
81 Km NW of Benevento (60091 inhabitants)
81 Km N of Pozzuoli (81661 inhabitants)
84 Km N of Napoli (974074 inhabitants)
87 Km S of Chieti (51815 inhabitants)
88 Km NW of Portici (55274 inhabitants)
90 Km NW of Ercolano (53709 inhabitants)
93 Km NW of Torre del Greco (86275 inhabitants)
94 Km E of Latina (125985 inhabitants)
98 Km NW of Avellino (54857 inhabitants)
100 Km S of Pescara (121014 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 2021-03-22
03:33:50		 41.578 14.0187 6 2021-07-12
16:55:12		 Bollettino Sismico Italiano INGV 90511591
Reviewed
Rev100 		ML 1.7 2021-03-22
03:33:50		 41.5688 14.032 4 2021-03-22
03:48:11		 Sala Sismica INGV-Roma 88364481
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-03-22 03:33:50 ± 0.09
Latitude 41.5780 ± 0.0054
Longitude 14.0187 ± 0.0060
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90511591

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 468
Semi-minor axis of confidence ellipse (meter) 424
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 7
Circular confidence region, given by single value of horizontal uncertainty (meter) 470.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 106
Number of associated phases, regardless of their use for origin computation 39
Number of defining phases 21
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.54499
Number of stations at which the event was observed 32
Number of stations from which data was used for origin computation 17
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 90511591
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-26 14:41:02

ML:1.7

Field Value
Value 1.7
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 88364481
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-03-22 03:48:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.RESU.HHZ. 2021-03-22T03:35:10.76 3.0 undecidable manual Sg 8.84 0
IV.CPGN.EHZ. 2021-03-22T03:35:06.51 3.0 undecidable manual Sg 14.7 0
IV.MTGR.HHZ. 2021-03-22T03:34:57.33 3.0 undecidable manual Sn 1.46 0
IV.ASQU.HHZ. 2021-03-22T03:34:52.52 3.0 undecidable manual Sn -1.96 0
IV.APRC.HHZ. 2021-03-22T03:34:28.98 3.0 undecidable manual Sn 0.13 0
IV.SSP9.EHZ. 2021-03-22T03:34:26.02 3.0 negative manual Pg 13.27 0
IT.GLNS.HNZ. 2021-03-22T03:34:22.36 3.0 undecidable manual Sn -0.22 0
IV.ARVD.HHZ. 2021-03-22T03:34:16.62 3.0 undecidable manual Pg 6.4 0
IV.IST3.HHZ. 2021-03-22T03:34:15.40 3.0 positive manual Pg 4.18 0
IV.PAOL.HHZ. 2021-03-22T03:34:14.08 3.0 undecidable manual Sn 1.13 0
IV.MTGR.HHZ. 2021-03-22T03:34:13.33 3.0 positive manual Pn -3.93 0
IV.LPEL.HHZ. 2021-03-22T03:34:08.68 0.3 undecidable manual S 100
IV.IFOR.HHZ. 2021-03-22T03:34:07.09 3.0 undecidable manual Sn -0.52 0
IV.ATFO.HHZ. 2021-03-22T03:34:07.55 3.0 undecidable manual Pn -1.65 0
IV.GAVE.EHZ. 2021-03-22T03:34:04.33 3.0 undecidable manual Pn 3.41 0
IT.GLNS.HNZ. 2021-03-22T03:34:01.65 3.0 undecidable manual Pg 3.09 0
IV.SACR.HNN. 2021-03-22T03:34:01.83 1.0 undecidable manual P 109 60.495 50 0.33 23
IT.SULP.HGN. 2021-03-22T03:34:01.03 1.0 undecidable manual P 352 56.6988 50 0.11 24
IV.POFI.HHZ. 2021-03-22T03:34:00.82 1.0 undecidable manual S 301 29.748 102 0.15 25
IT.OPI.HGE. 2021-03-22T03:33:59.85 0.6 undecidable manual S 325 26.9508 103 0.12 50
IV.BSSO.HHE. 2021-03-22T03:33:59.59 1.0 undecidable manual P 94 47.8188 50 0.04 25
IV.INTR.HHZ. 2021-03-22T03:33:59.82 1.0 undecidable manual P 349 49.0176 50 0.09 24
IV.VVLD.HHZ. 2021-03-22T03:33:58.51 0.6 undecidable manual P 315 46.0206 50 -0.76 41
IV.LIK.EHN.01 2021-03-22T03:33:58.09 1.0 undecidable manual P 257 39.1275 99 0.04 25
IV.LRP.EHN. 2021-03-22T03:33:57.55 0.6 undecidable manual P 282 36.6411 100 -0.02 51
IV.MCI.EHZ. 2021-03-22T03:33:57.55 0.6 undecidable manual S 241 19.6692 107 0.29 49
IV.SGG.HHN. 2021-03-22T03:33:57.58 1.0 undecidable manual P 125 36.741 100 0 25
IV.TST01.HHZ. 2021-03-22T03:33:57.60 0.6 undecidable manual P 58 35.9418 100 0.17 49
IV.POFI.HHZ. 2021-03-22T03:33:56.12 0.6 undecidable manual P 301 29.748 102 -0.09 50
IV.CDRU.HHZ. 2021-03-22T03:33:55.37 3.0 undecidable manual Pn -3.8 0
IT.OPI.HGE. 2021-03-22T03:33:55.59 0.3 undecidable manual P 325 26.9508 103 -0.08 76
IV.VAGA.HHZ. 2021-03-22T03:33:55.10 0.3 undecidable manual P 135 25.4523 104 -0.26 74
IV.MIDA.HHZ. 2021-03-22T03:33:54.52 0.3 undecidable manual P 70 20.7681 106 0.06 77
IV.RNI2.HNE. 2021-03-22T03:33:54.54 0.6 undecidable manual P 39 17.7711 109 0.65 45
IV.CAFE.HHZ. 2021-03-22T03:33:54.32 3.0 undecidable manual Pn -3.49 0
IV.MCI.EHZ. 2021-03-22T03:33:54.55 0.6 undecidable manual P 241 19.6692 107 0.31 49
IV.CERA.HHZ. 2021-03-22T03:33:52.40 0.3 undecidable manual S 359 2.1978 160 0.01 81
IV.PAOL.HHZ. 2021-03-22T03:33:51.83 3.0 undecidable manual P -1.32 0
IV.CERA.HHZ. 2021-03-22T03:33:51.07 0.1 positive manual P 359 2.1978 160 -0.36 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.POFI.HHE. ML:1.2 0.00009039999999999999 0.8 AML other m 2021-03-22T03:34:02.04
IV.POFI.HHN. ML:1.3 0.00009965930000000001 2.52 AML other m 2021-03-22T03:34:03.09
IV.MIDA.HHN. ML:1.7 0.00038037695 2.04 AML other m 2021-03-22T03:33:59.97
IV.MIDA.HHE. ML:1.7 0.00039584189999999995 2.72 AML other m 2021-03-22T03:34:04.89
IV.POFI.HNN. ML:1.5 0.0001614276 3.1088 AML other m 2021-03-22T03:34:00.88
IV.POFI.HNE. ML:1.4 0.00013438685 5.6288 AML other m 2021-03-22T03:33:59.24
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