Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 0.9 on date 18-12-2020 and time 18:30:46 (Italy) in region 4 km S Scapoli (IS)

A magnitude ML 0.9 earthquake occured in region: 4 km S Scapoli (IS), on

  • 18-12-2020 17:30:46 (UTC)
  • 18-12-2020 18:30:46 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.5850, 14.0520 at 16 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
Scapoli IS 4 680 680
Filignano IS 4 648 1328
Colli a Volturno IS 5 1349 2677
Rocchetta a Volturno IS 5 1113 3790
Montaquila IS 6 2456 6246
Fornelli IS 8 1909 8155
Castel San Vincenzo IS 8 516 8671
Pozzilli IS 8 2380 11051
Cerro al Volturno IS 9 1281 12332
Pizzone IS 9 329 12661
Acquafondata FR 9 263 12924
Viticuso FR 10 353 13277
Macchia d'Isernia IS 10 1035 14312
Conca Casale IS 11 200 14512
San Biagio Saracinisco FR 11 349 14861
Venafro IS 11 11280 26141
Vallerotonda FR 12 1581 27722
Monteroduni IS 12 2264 29986
Acquaviva d'Isernia IS 13 425 30411
Isernia IS 15 21842 52253
Montenero Val Cocchiara IS 15 538 52791
Sant'Agapito IS 15 1496 54287
Capriati a Volturno CE 15 1541 55828
Rionero Sannitico IS 16 1118 56946
Sant'Elia Fiumerapido FR 16 6166 63112
San Vittore del Lazio FR 16 2636 65748
Forlì del Sannio IS 16 675 66423
Alfedena AQ 17 864 67287
Cervaro FR 17 8109 75396
Picinisco FR 17 1218 76614
Ciorlano CE 17 426 77040
San Pietro Infine CE 17 944 77984
Miranda IS 18 1047 79031
Longano IS 18 690 79721
Fontegreca CE 18 811 80532
Villa Latina FR 18 1241 81773
Scontrone AQ 18 574 82347
Sesto Campano IS 18 2388 84735
Pettoranello del Molise IS 19 460 85195
Settefrati FR 19 728 85923
Pesche IS 19 1661 87584
Gallo Matese CE 20 579 88163
Roccasicura IS 20 550 88713
Barrea AQ 20 726 89439

Municipalities with at least 50000 inhabitants

An earthquake occurred to
61 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 N of Afragola (65057 inhabitants)
77 Km N of Marano di Napoli (59874 inhabitants)
78 Km N of Casoria (77642 inhabitants)
79 Km NW of Benevento (60091 inhabitants)
82 Km N of Pozzuoli (81661 inhabitants)
84 Km N of Napoli (974074 inhabitants)
86 Km S of Chieti (51815 inhabitants)
88 Km N of Portici (55274 inhabitants)
90 Km N of Ercolano (53709 inhabitants)
93 Km N of Torre del Greco (86275 inhabitants)
96 Km E of Latina (125985 inhabitants)
97 Km NW of Avellino (54857 inhabitants)
99 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 0.9 2020-12-18
17:30:46		 41.585 14.0523 16 2021-02-26
14:56:20		 Bollettino Sismico Italiano INGV 87384051
Reviewed
Rev100 		ML 0.9 2020-12-18
17:30:47		 41.5998 14.0238 15 2020-12-18
17:41:13		 Sala Sismica INGV-Roma 85525571
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-18 17:30:46 ± 0.29
Latitude 41.5850 ± 0.0135
Longitude 14.0523 ± 0.0168
Depth (km) 16 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 87384051

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1417
Semi-minor axis of confidence ellipse (meter) 903
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 235
Circular confidence region, given by single value of horizontal uncertainty (meter) 1420.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 139
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.41
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.35343
Number of stations at which the event was observed 24
Number of stations from which data was used for origin computation 7
Magnitudes information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 87384051
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-02-22 18:04:17

ML:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 8
Type of magnitude ML
Reference to an origin 85525571
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2020-12-18 17:41:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BRSN.HNZ. 2020-12-18T17:31:46.31 3.0 undecidable manual Sn -2.07 0
IV.RIBO.EHZ.01 2020-12-18T17:31:44.19 3.0 undecidable manual Sg 7.66 0
IV.MMO1.EHZ. 2020-12-18T17:31:37.80 3.0 undecidable manual Sg 20.549999 0
IV.PE3.EHZ. 2020-12-18T17:31:37.64 3.0 undecidable manual Sn 3.28 0
GU.RNCA.HHZ. 2020-12-18T17:31:33.80 3.0 negative manual Pg 0.42 0
IV.CAGR.HHZ. 2020-12-18T17:31:32.89 3.0 undecidable manual Pg 0.57 0
IV.SARZ.HHZ. 2020-12-18T17:31:28.57 3.0 undecidable manual Pn -8.4 0
IV.SPS2.HHZ. 2020-12-18T17:31:26.93 3.0 undecidable manual Pg 6.61 0
IV.FOSV.EHZ. 2020-12-18T17:31:25.83 3.0 undecidable manual Sn 0.21 0
IV.RCAV.EHZ. 2020-12-18T17:31:21.95 3.0 undecidable manual Sg 13.1 0
IV.NDIM.HNZ. 2020-12-18T17:31:16.54 3.0 positive manual Pn -8.49 0
IV.SCHR.EHZ. 2020-12-18T17:31:14.62 3.0 undecidable manual Pg 4.11 0
IV.PE3.EHZ. 2020-12-18T17:31:10.07 3.0 undecidable manual Pg 4.69 0
IT.RMVT.HGZ. 2020-12-18T17:31:08.81 3.0 undecidable manual Sn -3.51 0
IV.IMOL.HNZ. 2020-12-18T17:31:07.95 3.0 positive manual Pn -7.43 0
IV.MTMR.EHZ. 2020-12-18T17:30:56.43 3.0 undecidable manual Pn -1.89 0
IV.VAGA.HHZ. 2020-12-18T17:30:56.89 0.6 undecidable manual S 141 24.1536 111 0.85 38
IV.LRP.EHN. 2020-12-18T17:30:54.54 0.3 undecidable manual P 280 39.2274 100 0.11 70
IV.RNI2.HHZ. 2020-12-18T17:30:54.61 0.6 undecidable manual S 32 15.4734 126 0.6 43
IT.MTCL.HGZ. 2020-12-18T17:30:54.32 3.0 undecidable manual Pn -2.75 0
IV.MIDA.HHZ. 2020-12-18T17:30:53.71 0.6 undecidable manual S 69 17.871 121 -0.82 39
IV.SGG.HHN. 2020-12-18T17:30:53.10 0.6 undecidable manual P 129 34.9428 102 -0.68 40
IV.POFI.HNZ. 2020-12-18T17:30:53.16 0.6 undecidable manual P 298 31.8459 104 -0.15 47
IV.VAGA.HHZ. 2020-12-18T17:30:52.39 0.3 undecidable manual P 141 24.1536 111 0.21 70
IV.LAV9.HNZ. 2020-12-18T17:30:51.89 3.0 positive manual P -0.04 0
IV.MIDA.HHZ. 2020-12-18T17:30:51.32 0.3 undecidable manual P 69 17.871 121 0.01 74
IV.RNI2.HHZ. 2020-12-18T17:30:51.31 0.3 undecidable manual P 32 15.4734 126 0.31 70
IV.CERA.HHZ. 2020-12-18T17:30:51.46 0.6 undecidable manual S 297 3.1968 167 -0.65 43
IV.CERA.HHZ. 2020-12-18T17:30:49.84 0.1 undecidable manual P 297 3.1968 167 -0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CERA.HHN. ML:1.0 0.00012195 0.58 AML other m 2020-12-18T17:30:51.83
IV.CERA.HHE. ML:0.9 0.00007805000000000001 1.58 AML other m 2020-12-18T17:30:54.98
IV.RNI2.HHN. ML:0.9 0.00006515 0.42 AML other m 2020-12-18T17:30:55.25
IV.MIDA.HHN. ML:1.0 0.00006295000000000001 0.7 AML other m 2020-12-18T17:30:55.50
IV.RNI2.HHE. ML:1.0 0.00008060000000000001 0.64 AML other m 2020-12-18T17:30:55.55
IV.MIDA.HHE. ML:0.7 0.00003465 0.7 AML other m 2020-12-18T17:30:57.72
IV.VAGA.HHN. ML:0.9 0.0000413 1.06 AML other m 2020-12-18T17:30:58.17
IV.VAGA.HHE. ML:0.8 0.00003125 1 AML other m 2020-12-18T17:30:58.91
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