Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 20-12-2021 and time 20:44:57 (Italy) in region 4 km W Gioia Sannitica (CE)

A magnitude ML 1.4 earthquake occured in region: 4 km W Gioia Sannitica (CE), on

  • 20-12-2021 19:44:57 (UTC)
  • 20-12-2021 20:44:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.2900, 14.3960 at 9 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 6 1925 5563
Alife CE 7 7616 13179
Alvignano CE 7 4824 18003
Faicchio BN 7 3634 21637
Dragoni CE 8 2108 23745
Piedimonte Matese CE 8 11297 35042
Ruviano CE 9 1655 36697
Puglianello BN 9 1349 38046
Castello del Matese CE 9 1494 39540
San Salvatore Telesino BN 10 3999 43539
Amorosi BN 11 2797 46336
Cusano Mutri BN 11 4091 50427
San Gregorio Matese CE 11 988 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
Piana di Monte Verna CE 14 2390 83987
Roccaromana CE 15 856 84843
Pietraroja BN 15 545 85388
Raviscanina CE 16 1319 86707
Pontelatone CE 16 1703 88410
Formicola CE 16 1488 89898
Limatola BN 16 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
Castel Morrone CE 19 3858 118423
Valle Agricola CE 19 890 119313
Giano Vetusto CE 19 647 119960
Camigliano CE 19 1943 121903
Ailano CE 20 1369 123272
San Lorenzo Maggiore BN 20 2154 125426
Pietravairano CE 20 2984 128410
Bellona CE 20 6053 134463
Campochiaro CB 20 646 135109

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 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)
41 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)
51 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)
55 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)
70 Km NW of Cava de' Tirreni (53659 inhabitants)
75 Km NW of Salerno (135261 inhabitants)
90 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 1.4 2021-12-20
19:44:57		 41.2898 14.3962 9 2022-03-30
13:04:41		 Bollettino Sismico Italiano INGV 102259851
Reviewed
Rev100 		ML 1.3 2021-12-20
19:44:57		 41.2897 14.3907 7 2021-12-20
19:57:16		 Sala Sismica INGV-Roma 98764311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-20 19:44:57 ± 0.09
Latitude 41.2898 ± 0.0054
Longitude 14.3962 ± 0.0072
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 102259851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 620
Semi-minor axis of confidence ellipse (meter) 213
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 50
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) 88
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) 0.27
Epicentral distance of station closest to the epicenter (degree) 0.09713
Epicentral distance of station farthest from the epicenter (degree) 0.45146
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:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 20
Type of magnitude ML
Reference to an origin 98764311
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-20 19:57:16

ML:1.4

Field Value
Value 1.4
Uncertainty 0.3
Num. used stations 22
Type of magnitude ML
Reference to an origin 102259851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-22 16:20:33
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.MIDA.HHZ. 2021-12-20T19:45:12.30 0.6 undecidable manual S 343 40.8258 50 0.83 38
IV.PAOL.HNE. 2021-12-20T19:45:09.55 0.6 undecidable manual S 153 32.0457 105 0.44 44
IV.VITU.HHZ. 2021-12-20T19:45:06.47 0.6 undecidable manual S 121 22.8549 111 0.41 45
IV.RNI2.HHE. 2021-12-20T19:45:06.96 0.3 undecidable manual P 336 50.1165 50 -0.08 69
IV.CERA.HNN. 2021-12-20T19:45:06.60 0.3 undecidable manual P 318 46.4202 50 0.14 69
IV.MIDA.HHZ. 2021-12-20T19:45:05.10 0.3 undecidable manual P 343 40.8258 50 -0.5 65
IV.BSSO.HHZ. 2021-12-20T19:45:04.16 0.3 undecidable manual P 30 32.8449 50 -0.22 70
IV.PIGN.HHZ. 2021-12-20T19:45:04.83 0.6 undecidable manual S 241 20.5683 113 -0.52 44
IV.VAGA.HHZ. 2021-12-20T19:45:04.97 0.6 undecidable manual S 316 19.3695 114 0.01 49
IV.PAOL.HNE. 2021-12-20T19:45:04.21 0.3 undecidable manual P 153 32.0457 105 -0.03 72
IV.PTRJ.HHZ. 2021-12-20T19:45:03.12 0.6 undecidable manual S 53 13.7751 122 -0.12 49
IV.SACR.HNN. 2021-12-20T19:45:03.41 0.3 undecidable manual P 65 28.4493 107 -0.13 71
IV.SGG.HHZ. 2021-12-20T19:45:02.61 0.6 undecidable manual S 352 10.7781 129 0.21 48
IV.VAGA.HHZ. 2021-12-20T19:45:02.38 0.3 undecidable manual P 316 19.3695 114 0.54 66
IV.VITU.HHZ. 2021-12-20T19:45:02.43 0.1 undecidable manual P 121 22.8549 111 -0.05 98
IV.PIGN.HHZ. 2021-12-20T19:45:02.06 0.3 undecidable manual P 241 20.5683 113 0 74
IV.SGG.HHZ. 2021-12-20T19:45:00.33 0.1 undecidable manual P 352 10.7781 129 -0.04 100
IV.PTRJ.HHZ. 2021-12-20T19:45:00.64 0.1 undecidable manual P 53 13.7751 122 -0.21 96
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.PTRJ.HHE. ML:0.0 0.00000885583 0.3968 AML other m 2021-12-20T19:45:01.70
IV.SGG.HHE. ML:1.4 0.00035738415000000003 0.2176 AML other m 2021-12-20T19:45:04.24
IV.PTRJ.HHN. ML:1.7 0.0005229473 1.616 AML other m 2021-12-20T19:45:04.93
IV.SGG.HNE. ML:1.5 0.00043878075 1.3344 AML other m 2021-12-20T19:45:06.68
IV.VITU.HHN. ML:1.5 0.00020750000000000003 0.56 AML other m 2021-12-20T19:45:07.13
IV.PIGN.HHN. ML:1.0 0.00006749418 0.32 AML other m 2021-12-20T19:45:07.44
IV.SGG.HNN. ML:1.5 0.0004102935 0.4224 AML other m 2021-12-20T19:45:08.84
IV.PIGN.HNN. ML:1.0 0.000064608285 0.2816 AML other m 2021-12-20T19:45:08.81
IV.VITU.HHE. ML:1.4 0.000186 0.32 AML other m 2021-12-20T19:45:08.66
IV.PIGN.HNE. ML:1.1 0.00009992062000000001 0.4224 AML other m 2021-12-20T19:45:08.94
IV.PIGN.HHE. ML:1.2 0.00011618468500000001 0.4096 AML other m 2021-12-20T19:45:08.95
IV.SGG.HHN. ML:1.5 0.00041821054999999994 1.5392 AML other m 2021-12-20T19:45:09.84
IV.VAGA.HHE. ML:1.5 0.00023899999999999998 0.2 AML other m 2021-12-20T19:45:09.57
IV.VAGA.HNE. ML:1.5 0.00022999999999999998 0.2 AML other m 2021-12-20T19:45:09.58
IV.VAGA.HHN. ML:1.7 0.00036950215 0.256 AML other m 2021-12-20T19:45:10.45
IV.VAGA.HNN. ML:1.8 0.000465 0.5 AML other m 2021-12-20T19:45:10.47
IV.BSSO.HHE. ML:1.3 0.000096345405 0.6656 AML other m 2021-12-20T19:45:12.15
IV.BSSO.HHN. ML:1.3 0.00009535 1.52 AML other m 2021-12-20T19:45:12.77
IV.BSSO.HNN. ML:1.4 0.00010214785 1.5392 AML other m 2021-12-20T19:45:12.77
IV.MIDA.HHN. ML:1.2 0.000048430655 0.5248 AML other m 2021-12-20T19:45:17.47
IV.MIDA.HNE. ML:1.3 0.0000673416565 0.7808 AML other m 2021-12-20T19:45:17.49
IV.MIDA.HHE. ML:1.1 0.000042361005000000004 0.5376 AML other m 2021-12-20T19:45:17.51
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