Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 31-12-2021 and time 23:16:31 (UTC) in region 2 km N Filignano (IS)

A magnitude ML 1.5 earthquake occured in region: 2 km N Filignano (IS), on

  • 31-12-2021 23:16:31 (UTC)
  • 01-01-2022 00:16:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.5610, 14.0560 at 10 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 2 648 648
Montaquila IS 5 2456 3104
Pozzilli IS 6 2380 5484
Colli a Volturno IS 6 1349 6833
Scapoli IS 6 680 7513
Rocchetta a Volturno IS 8 1113 8626
Viticuso FR 8 353 8979
Venafro IS 8 11280 20259
Conca Casale IS 8 200 20459
Fornelli IS 9 1909 22368
Acquafondata FR 9 263 22631
Macchia d'Isernia IS 9 1035 23666
Castel San Vincenzo IS 11 516 24182
Monteroduni IS 11 2264 26446
Cerro al Volturno IS 11 1281 27727
Pizzone IS 12 329 28056
Vallerotonda FR 12 1581 29637
San Biagio Saracinisco FR 12 349 29986
Capriati a Volturno CE 13 1541 31527
Sant'Agapito IS 14 1496 33023
Isernia IS 15 21842 54865
San Vittore del Lazio FR 15 2636 57501
Acquaviva d'Isernia IS 15 425 57926
Ciorlano CE 15 426 58352
San Pietro Infine CE 15 944 59296
Cervaro FR 15 8109 67405
Sesto Campano IS 16 2388 69793
Fontegreca CE 16 811 70604
Sant'Elia Fiumerapido FR 16 6166 76770
Longano IS 16 690 77460
Montenero Val Cocchiara IS 17 538 77998
Gallo Matese CE 18 579 78577
Mignano Monte Lungo CE 18 3250 81827
Picinisco FR 18 1218 83045
Rionero Sannitico IS 18 1118 84163
Forlì del Sannio IS 18 675 84838
Miranda IS 18 1047 85885
Pettoranello del Molise IS 19 460 86345
Prata Sannita CE 19 1502 87847
Villa Latina FR 19 1241 89088
Alfedena AQ 19 864 89952
Pesche IS 20 1661 91613

Municipalities with at least 50000 inhabitants

An earthquake occurred to
59 Km NW of Caserta (76326 inhabitants)
67 Km N of Aversa (53047 inhabitants)
71 Km N of Giugliano in Campania (122974 inhabitants)
73 Km NW of Acerra (59573 inhabitants)
74 Km N of Afragola (65057 inhabitants)
74 Km N of Marano di Napoli (59874 inhabitants)
75 Km N of Casoria (77642 inhabitants)
77 Km NW of Benevento (60091 inhabitants)
79 Km N of Pozzuoli (81661 inhabitants)
82 Km N of Napoli (974074 inhabitants)
86 Km N of Portici (55274 inhabitants)
87 Km N of Ercolano (53709 inhabitants)
88 Km S of Chieti (51815 inhabitants)
90 Km N of Torre del Greco (86275 inhabitants)
95 Km NW of Avellino (54857 inhabitants)
96 Km E of Latina (125985 inhabitants)
99 Km NW of Scafati (50787 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 2021-12-31
23:16:31		 41.5613 14.056 10 2022-03-30
13:04:34		 Bollettino Sismico Italiano INGV 100568391
Reviewed
Rev100 		ML 1.5 2021-12-31
23:16:31		 41.545 14.0647 9 2021-12-31
23:22:09		 Sala Sismica INGV-Roma 99209161
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-31 23:16:31 ± 0.08
Latitude 41.5613 ± 0.0054
Longitude 14.0560 ± 0.0060
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 100568391

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 616
Semi-minor axis of confidence ellipse (meter) 453
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 19
Circular confidence region, given by single value of horizontal uncertainty (meter) 620.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 83
Number of associated phases, regardless of their use for origin computation 18
Number of defining phases 18
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.25
Epicentral distance of station closest to the epicenter (degree) 0.04587
Epicentral distance of station farthest from the epicenter (degree) 0.44606
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 100568391
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-02-03 15:01:10

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 18
Type of magnitude ML
Reference to an origin 99209161
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-31 23:22:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.LRP.EHZ. 2021-12-31T23:16:45.28 0.6 undecidable manual S 284 40.1265 50 0.24 45
IV.TST01.HHZ. 2021-12-31T23:16:43.74 0.6 undecidable manual S 53 34.4433 50 0.21 46
IV.PIGN.HHZ. 2021-12-31T23:16:40.16 0.6 undecidable manual P 166 41.4252 50 0.58 42
IV.VAGA.HHZ. 2021-12-31T23:16:40.03 0.6 undecidable manual S 137 21.9669 114 0.03 49
IV.VVLD.HHZ. 2021-12-31T23:16:40.30 0.3 undecidable manual P 314 49.5171 50 -0.54 63
IV.LRP.EHZ. 2021-12-31T23:16:39.23 0.3 undecidable manual P 284 40.1265 50 -0.15 69
IV.RNI2.HHZ. 2021-12-31T23:16:39.37 0.6 undecidable manual S 27 17.6712 119 0.69 42
IT.OPI.HGE. 2021-12-31T23:16:38.07 0.3 undecidable manual P 322 30.3474 50 0.2 70
IV.SGG.HHZ. 2021-12-31T23:16:38.32 0.3 undecidable manual P 126 33.1446 50 0.02 72
IV.POFI.HNE. 2021-12-31T23:16:38.03 0.3 undecidable manual P 301 33.3444 50 -0.31 68
IV.MIDA.HHZ. 2021-12-31T23:16:38.62 0.6 undecidable manual S 61 18.6702 118 -0.38 46
IV.TST01.HHZ. 2021-12-31T23:16:38.54 0.3 undecidable manual P 53 34.4433 50 0.03 72
IV.MCI.EHZ. 2021-12-31T23:16:36.67 0.3 undecidable manual P 249 21.6672 115 0.26 70
IV.VAGA.HHZ. 2021-12-31T23:16:36.35 0.1 undecidable manual P 137 21.9669 114 -0.12 96
IV.MIDA.HHZ. 2021-12-31T23:16:35.64 0.1 undecidable manual P 61 18.6702 118 -0.25 94
IV.CERA.HHZ. 2021-12-31T23:16:35.57 0.3 undecidable manual S 322 5.0949 153 0.04 76
IV.RNI2.HHZ. 2021-12-31T23:16:35.85 0.1 undecidable manual P 27 17.6712 119 0.15 96
IV.CERA.HHZ. 2021-12-31T23:16:33.81 0.1 undecidable manual P 322 5.0949 153 -0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MIDA.HHN. ML:1.4 0.0002095 0.74 AML other m 2021-12-31T23:16:40.14
IV.MCI.EHN. ML:1.8 0.00046699999999999997 0.24 AML other m 2021-12-31T23:16:41.74
IV.VAGA.HHN. ML:1.7 0.0003685 0.24 AML other m 2021-12-31T23:16:41.82
IV.VAGA.HHE. ML:1.5 0.00022300000000000003 1.32 AML other m 2021-12-31T23:16:41.05
IV.VAGA.HNE. ML:1.5 0.00020250000000000002 1.84 AML other m 2021-12-31T23:16:41.05
IV.RNI2.HNN. ML:1.5 0.0002685 1.42 AML other m 2021-12-31T23:16:42.14
IV.RNI2.HHN. ML:1.5 0.00027600000000000004 1.44 AML other m 2021-12-31T23:16:43.03
IV.SGG.HHE. ML:1.4 0.0001095 0.56 AML other m 2021-12-31T23:16:44.50
IV.MIDA.HHE. ML:1.4 0.0001995 1 AML other m 2021-12-31T23:16:44.60
IV.MCI.EHE. ML:2.0 0.0007130000000000001 0.54 AML other m 2021-12-31T23:16:45.68
IV.VAGA.HNN. ML:1.7 0.0003585 0.22 AML other m 2021-12-31T23:16:45.81
IV.LRP.EHE. ML:1.4 0.0000808 1.64 AML other m 2021-12-31T23:16:46.04
IV.RNI2.HHE. ML:1.6 0.00035450000000000005 0.7 AML other m 2021-12-31T23:16:46.61
IV.RNI2.HNE. ML:1.6 0.0003325 0.68 AML other m 2021-12-31T23:16:46.62
IV.LRP.EHN. ML:0.9 0.000026700000000000002 1.16 AML other m 2021-12-31T23:16:47.97
IV.PIGN.HHN. ML:1.0 0.00003025 0.42 AML other m 2021-12-31T23:16:48.23
IV.SGG.HHN. ML:1.6 0.000153 0.44 AML other m 2021-12-31T23:16:49.98
IV.PIGN.HHE. ML:1.0 0.0000303 0.74 AML other m 2021-12-31T23:16:57.00
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