Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.1 on date 20-12-2021 and time 20:03:11 (UTC) in region 3 km SW Gioia Sannitica (CE)

A magnitude ML 1.1 earthquake occured in region: 3 km SW Gioia Sannitica (CE), on

  • 20-12-2021 20:03:11 (UTC)
  • 20-12-2021 21:03:11 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.2840, 14.4140 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
Gioia Sannitica CE 3 3638 3638
Faicchio BN 6 3634 7272
San Potito Sannitico CE 6 1925 9197
Puglianello BN 8 1349 10546
Alvignano CE 8 4824 15370
Alife CE 8 7616 22986
Ruviano CE 8 1655 24641
San Salvatore Telesino BN 9 3999 28640
Piedimonte Matese CE 9 11297 39937
Dragoni CE 9 2108 42045
Amorosi BN 10 2797 44842
Castello del Matese CE 10 1494 46336
Cusano Mutri BN 10 4091 50427
San Lorenzello BN 11 2227 52654
Castel Campagnano CE 12 1581 54235
San Gregorio Matese CE 12 988 55223
Cerreto Sannita BN 12 3940 59163
Telese Terme BN 12 7486 66649
Caiazzo CE 12 5595 72244
Castelvenere BN 13 2562 74806
Liberi CE 13 1153 75959
Pietraroja BN 14 545 76504
Baia e Latina CE 14 2197 78701
Castel di Sasso CE 14 1171 79872
Piana di Monte Verna CE 14 2390 82262
Solopaca BN 15 3820 86082
Melizzano BN 16 1858 87940
Sant'Angelo d'Alife CE 16 2270 90210
Limatola BN 16 4073 94283
Roccaromana CE 16 856 95139
Guardia Sanframondi BN 16 5078 100217
Dugenta BN 17 2798 103015
Pontelatone CE 17 1703 104718
Frasso Telesino BN 17 2318 107036
Formicola CE 17 1488 108524
Raviscanina CE 17 1319 109843
San Lorenzo Maggiore BN 18 2154 111997
San Lupo BN 19 801 112798
Castel Morrone CE 19 3858 116656
Pietramelara CE 19 4722 121378
Guardiaregia CB 20 801 122179
Campochiaro CB 20 646 122825

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km N of Caserta (76326 inhabitants)
35 Km NW of Benevento (60091 inhabitants)
38 Km N of Acerra (59573 inhabitants)
39 Km NE of Aversa (53047 inhabitants)
41 Km N of Afragola (65057 inhabitants)
43 Km N of Casoria (77642 inhabitants)
43 Km NE of Giugliano in Campania (122974 inhabitants)
47 Km NE of Marano di Napoli (59874 inhabitants)
51 Km N of Napoli (974074 inhabitants)
51 Km N of Portici (55274 inhabitants)
52 Km NW of Avellino (54857 inhabitants)
53 Km N of Ercolano (53709 inhabitants)
55 Km N of Torre del Greco (86275 inhabitants)
56 Km NE of Pozzuoli (81661 inhabitants)
60 Km N of Scafati (50787 inhabitants)
66 Km N of Castellammare di Stabia (66466 inhabitants)
69 Km NW of Cava de' Tirreni (53659 inhabitants)
73 Km NW of Salerno (135261 inhabitants)
89 Km NW of Battipaglia (50786 inhabitants)
92 Km SW of San Severo (53905 inhabitants)
96 Km W of Foggia (151991 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 1.1 2021-12-20
20:03:11		 41.284 14.4138 8 2022-03-30
13:04:41		 Bollettino Sismico Italiano INGV 102260301
Reviewed
Rev100 		ML 1.1 2021-12-20
20:03:11		 41.2547 14.4128 9 2021-12-20
20:13:28		 Sala Sismica INGV-Roma 98764971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-20 20:03:11 ± 0.12
Latitude 41.2840 ± 0.0063
Longitude 14.4138 ± 0.0084
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 102260301

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 682
Semi-minor axis of confidence ellipse (meter) 514
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 214
Circular confidence region, given by single value of horizontal uncertainty (meter) 680.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 90
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.10612
Epicentral distance of station farthest from the epicenter (degree) 0.46225
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 19
Type of magnitude ML
Reference to an origin 98764971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-20 20:13:28

ML:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 19
Type of magnitude ML
Reference to an origin 102260301
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-22 16:33:19
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MIDA.HNE. 2021-12-20T20:03:27.12 0.6 undecidable manual S 342 41.8248 50 0.94 37
IV.RNI2.HNE. 2021-12-20T20:03:21.39 0.6 undecidable manual P 335 51.3153 50 -0.19 46
IV.VAGA.HHZ. 2021-12-20T20:03:20.11 0.6 undecidable manual S 314 20.868 111 0.5 45
IV.CERA.HHZ. 2021-12-20T20:03:20.77 0.3 undecidable manual P 317 47.9187 50 -0.28 68
IV.VITU.HHZ. 2021-12-20T20:03:19.40 0.6 undecidable manual S 122 21.2676 111 -0.31 47
IV.MIDA.HNE. 2021-12-20T20:03:19.69 0.3 undecidable manual P 342 41.8248 50 -0.44 67
IV.PAOL.HHN. 2021-12-20T20:03:18.89 0.3 undecidable manual P 155 30.8469 104 0.66 63
IV.BSSO.HHZ. 2021-12-20T20:03:18.47 0.3 undecidable manual P 27 32.745 104 -0.12 72
IV.PTRJ.HHZ. 2021-12-20T20:03:17.21 0.6 undecidable manual S 47 13.0758 121 0.05 51
IV.SACR.HHZ. 2021-12-20T20:03:17.74 0.3 undecidable manual P 63 27.3504 106 0.18 72
IV.VITU.HHZ. 2021-12-20T20:03:16.46 0.1 undecidable manual P 122 21.2676 111 0.07 100
IV.VAGA.HHZ. 2021-12-20T20:03:16.49 0.3 undecidable manual P 314 20.868 111 0.16 73
IV.PIGN.HHZ. 2021-12-20T20:03:16.22 0.1 undecidable manual P 245 21.6672 110 -0.25 96
IV.SGG.HHZ. 2021-12-20T20:03:16.76 0.3 undecidable manual S 346 11.7771 124 -0.02 77
IV.SGG.HHZ. 2021-12-20T20:03:14.52 0.1 undecidable manual P 346 11.7771 124 -0.17 99
IV.PTRJ.HHZ. 2021-12-20T20:03:14.80 0.1 undecidable manual P 47 13.0758 121 -0.12 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SGG.HHN. ML:1.2 0.00019661535 0.3328 AML other m 2021-12-20T20:03:17.76
IV.SGG.HNN. ML:1.2 0.00022632019999999997 0.448 AML other m 2021-12-20T20:03:17.59
IV.SGG.HHE. ML:1.1 0.00016149999999999997 0.18 AML other m 2021-12-20T20:03:18.61
IV.PTRJ.HHN. ML:1.2 0.00016672534999999998 0.4096 AML other m 2021-12-20T20:03:19.05
IV.VITU.HNN. ML:1.4 0.00018218440000000003 0.4224 AML other m 2021-12-20T20:03:20.79
IV.VITU.HHE. ML:1.2 0.000111 1.52 AML other m 2021-12-20T20:03:21.99
IV.PTRJ.HHE. ML:-0.1 0.000008980605999999998 0.3584 AML other m 2021-12-20T20:03:21.60
IV.VAGA.HHN. ML:1.2 0.0001064 0.8 AML other m 2021-12-20T20:03:22.08
IV.VAGA.HNN. ML:1.2 0.00010937788500000001 0.2816 AML other m 2021-12-20T20:03:22.51
IV.PIGN.HHE. ML:0.9 0.000052506910000000004 0.2432 AML other m 2021-12-20T20:03:22.64
IV.VITU.HHN. ML:1.1 0.00010125000000000001 0.48 AML other m 2021-12-20T20:03:23.42
IV.VITU.HNE. ML:1.2 0.00012737114999999998 0.7424 AML other m 2021-12-20T20:03:24.45
IV.PIGN.HHN. ML:0.8 0.00004484216 0.256 AML other m 2021-12-20T20:03:25.33
IV.BSSO.HHE. ML:1.0 0.000043125505 0.6528 AML other m 2021-12-20T20:03:26.38
IV.VAGA.HHE. ML:1.2 0.00011399999999999999 0.28 AML other m 2021-12-20T20:03:26.84
IV.VAGA.HNE. ML:1.2 0.00010941405 0.2688 AML other m 2021-12-20T20:03:26.84
IV.BSSO.HNN. ML:1.0 0.00005175666000000001 1.1808 AML other m 2021-12-20T20:03:27.81
IV.BSSO.HNE. ML:1.2 0.00007240861500000001 0.2976 AML other m 2021-12-20T20:03:34.38
IV.BSSO.HHN. ML:0.8 0.000031023545 0.6048 AML other m 2021-12-20T20:03:36.35
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