Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.6 on date 20-12-2021 and time 20:58:53 (Italy) in region 4 km W Gioia Sannitica (CE)

A magnitude ML 1.6 earthquake occured in region: 4 km W Gioia Sannitica (CE), on

  • 20-12-2021 19:58:53 (UTC)
  • 20-12-2021 20:58:53 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.2910, 14.3960 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 4 3638 3638
San Potito Sannitico CE 5 1925 5563
Alife CE 6 7616 13179
Alvignano CE 7 4824 18003
Faicchio BN 7 3634 21637
Dragoni CE 7 2108 23745
Piedimonte Matese CE 8 11297 35042
Castello del Matese CE 9 1494 36536
Ruviano CE 9 1655 38191
Puglianello BN 9 1349 39540
San Salvatore Telesino BN 10 3999 43539
San Gregorio Matese CE 11 988 44527
Amorosi BN 11 2797 47324
Cusano Mutri BN 11 4091 51415
Liberi CE 12 1153 52568
Baia e Latina CE 12 2197 54765
San Lorenzello BN 12 2227 56992
Caiazzo CE 13 5595 62587
Castel Campagnano CE 13 1581 64168
Cerreto Sannita BN 14 3940 68108
Telese Terme BN 14 7486 75594
Castel di Sasso CE 14 1171 76765
Sant'Angelo d'Alife CE 14 2270 79035
Castelvenere BN 14 2562 81597
Pietraroja BN 14 545 82142
Piana di Monte Verna CE 15 2390 84532
Roccaromana CE 15 856 85388
Raviscanina CE 16 1319 86707
Formicola CE 16 1488 88195
Pontelatone CE 16 1703 89898
Limatola BN 17 4073 93971
Melizzano BN 17 1858 95829
Solopaca BN 17 3820 99649
Guardia Sanframondi BN 18 5078 104727
Pietramelara CE 18 4722 109449
Dugenta BN 18 2798 112247
Frasso Telesino BN 18 2318 114565
Valle Agricola CE 19 890 115455
Castel Morrone CE 19 3858 119313
Giano Vetusto CE 19 647 119960
Ailano CE 20 1369 121329
Camigliano CE 20 1943 123272
Pietravairano CE 20 2984 126256
San Lorenzo Maggiore BN 20 2154 128410
Campochiaro CB 20 646 129056
Bellona CE 20 6053 135109

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km N of Caserta (76326 inhabitants)
37 Km W of Benevento (60091 inhabitants)
38 Km N of Acerra (59573 inhabitants)
39 Km NE of Aversa (53047 inhabitants)
42 Km N of Afragola (65057 inhabitants)
43 Km NE of Giugliano in Campania (122974 inhabitants)
44 Km N of Casoria (77642 inhabitants)
47 Km NE of Marano di Napoli (59874 inhabitants)
52 Km N of Napoli (974074 inhabitants)
52 Km N of Portici (55274 inhabitants)
54 Km N of Ercolano (53709 inhabitants)
54 Km NW of Avellino (54857 inhabitants)
56 Km NE of Pozzuoli (81661 inhabitants)
56 Km N of Torre del Greco (86275 inhabitants)
61 Km N of Scafati (50787 inhabitants)
67 Km N of Castellammare di Stabia (66466 inhabitants)
71 Km NW of Cava de' Tirreni (53659 inhabitants)
75 Km NW of Salerno (135261 inhabitants)
91 Km NW of Battipaglia (50786 inhabitants)
93 Km W of San Severo (53905 inhabitants)
98 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 1.6 2021-12-20
19:58:53		 41.2907 14.3958 8 2022-03-30
13:04:34		 Bollettino Sismico Italiano INGV 100504171
Reviewed
Rev100 		ML 1.6 2021-12-20
19:58:53		 41.2965 14.3842 9 2021-12-20
20:07:16		 Sala Sismica INGV-Roma 98764801
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-20 19:58:53 ± 0.09
Latitude 41.2907 ± 0.0045
Longitude 14.3958 ± 0.0060
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 100504171

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 516
Semi-minor axis of confidence ellipse (meter) 285
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 216
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 88
Number of associated phases, regardless of their use for origin computation 20
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.45775
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 12
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 100504171
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-22 16:31:42

ML:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 24
Type of magnitude ML
Reference to an origin 98764801
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-20 20:07:16
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IX.COL3.HHZ.02 2021-12-20T19:59:13.31 3.0 undecidable manual P 0.54 0
IV.MIDA.HNE. 2021-12-20T19:59:07.53 0.6 undecidable manual S 343 40.7259 50 0.4 44
IV.PAOL.HHZ. 2021-12-20T19:59:05.34 0.6 undecidable manual S 153 32.1456 105 0.61 42
IV.SACR.HHN. 2021-12-20T19:59:03.96 0.3 undecidable manual S 65 28.4493 106 0.47 67
IV.RNI2.HNE. 2021-12-20T19:59:02.61 0.3 undecidable manual P 336 50.0166 50 -0.08 70
IV.TST01.HHZ. 2021-12-20T19:59:02.96 1.0 undecidable manual P 359 50.8158 50 0.15 23
IV.CERA.HHN. 2021-12-20T19:59:02.45 0.3 undecidable manual P 317 46.3203 50 0.34 67
IV.PIGN.HHZ. 2021-12-20T19:59:01.01 0.6 undecidable manual S 241 20.6682 112 0.08 49
IV.VITU.HHZ. 2021-12-20T19:59:01.87 0.3 undecidable manual S 121 22.8549 110 0.2 72
IV.MIDA.HNE. 2021-12-20T19:59:00.78 0.3 undecidable manual P 343 40.7259 50 -0.47 65
IV.SACR.HHN. 2021-12-20T19:58:59.05 0.3 undecidable manual P 65 28.4493 106 -0.1 72
IV.PAOL.HHZ. 2021-12-20T19:58:59.81 0.3 undecidable manual P 153 32.1456 105 -0.05 73
IV.BSSO.HHZ. 2021-12-20T19:58:59.75 0.3 undecidable manual P 30 32.745 104 -0.24 70
IV.PTRJ.HHZ. 2021-12-20T19:58:58.70 0.3 undecidable manual S 54 13.7751 121 -0.1 74
IV.SGG.HHZ. 2021-12-20T19:58:58.18 0.3 undecidable manual S 353 10.7781 128 0.24 72
IV.VITU.HHZ. 2021-12-20T19:58:57.74 0.1 undecidable manual P 121 22.8549 110 -0.35 92
IV.PIGN.HHZ. 2021-12-20T19:58:57.42 0.3 undecidable manual P 241 20.6682 112 -0.25 71
IV.VAGA.HHZ. 2021-12-20T19:58:57.70 0.3 undecidable manual P 316 19.2696 113 0.28 71
IV.PTRJ.HHZ. 2021-12-20T19:58:56.12 0.1 undecidable manual P 54 13.7751 121 -0.32 94
IV.SGG.HHZ. 2021-12-20T19:58:55.87 0.1 undecidable manual P 353 10.7781 128 -0.07 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PTRJ.HHE. ML:0.1 0.00001280283 1.6672 AML other m 2021-12-20T19:58:58.05
IV.SGG.HNE. ML:1.7 0.000668 0.46 AML other m 2021-12-20T19:58:58.27
IV.SGG.HNN. ML:1.8 0.00090555395 0.4736 AML other m 2021-12-20T19:58:59.08
IV.SGG.HHN. ML:1.8 0.0008865 0.46 AML other m 2021-12-20T19:58:59.09
IV.SGG.HHE. ML:1.7 0.00060638545 0.3968 AML other m 2021-12-20T19:59:00.36
IV.PTRJ.HHN. ML:1.8 0.00071238325 0.5632 AML other m 2021-12-20T19:59:00.40
IV.PIGN.HHN. ML:1.2 0.0001245 0.88 AML other m 2021-12-20T19:59:01.99
IV.PIGN.HNN. ML:1.2 0.000110675895 1.7312 AML other m 2021-12-20T19:59:02.98
IV.VITU.HHE. ML:1.7 0.00030224495 0.5248 AML other m 2021-12-20T19:59:02.32
IV.VITU.HHN. ML:1.7 0.00034931409999999996 1.616 AML other m 2021-12-20T19:59:02.84
IV.PIGN.HNE. ML:1.3 0.000158286 1.6032 AML other m 2021-12-20T19:59:03.13
IV.VAGA.HHN. ML:1.6 0.0003515 0.24 AML other m 2021-12-20T19:59:03.81
IV.VAGA.HNN. ML:1.6 0.00034050000000000004 0.24 AML other m 2021-12-20T19:59:03.69
IV.PIGN.HHE. ML:1.3 0.00015352700000000004 1.7184 AML other m 2021-12-20T19:59:03.98
IV.VITU.HNN. ML:1.7 0.00036520819999999996 0.2944 AML other m 2021-12-20T19:59:04.63
IV.VITU.HNE. ML:1.5 0.00020585324999999999 0.4096 AML other m 2021-12-20T19:59:05.11
IV.PAOL.HNN. ML:1.7 0.00024169570000000002 0.6848 AML other m 2021-12-20T19:59:06.14
IV.PAOL.HHE. ML:1.6 0.00019350000000000001 1.64 AML other m 2021-12-20T19:59:06.16
IV.PAOL.HNE. ML:1.7 0.00022284880000000002 0.384 AML other m 2021-12-20T19:59:06.72
IV.PAOL.HHN. ML:1.5 0.0001515 0.22 AML other m 2021-12-20T19:59:06.71
IV.BSSO.HHE. ML:1.4 0.00011780635 1.6416 AML other m 2021-12-20T19:59:07.12
IV.VAGA.HNE. ML:1.7 0.00041248795 0.3072 AML other m 2021-12-20T19:59:08.17
IV.VAGA.HHE. ML:1.7 0.0004205 0.3 AML other m 2021-12-20T19:59:08.17
IV.BSSO.HHN. ML:1.3 0.0000847 1.16 AML other m 2021-12-20T19:59:14.98
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