Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 21-12-2021 and time 11:33:30 (Italy) in region 4 km SW Gioia Sannitica (CE)

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

  • 21-12-2021 10:33:30 (UTC)
  • 21-12-2021 11:33:30 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.2820, 14.4020 at 5 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
Faicchio BN 7 3634 9197
Alvignano CE 7 4824 14021
Alife CE 8 7616 21637
Dragoni CE 8 2108 23745
Puglianello BN 8 1349 25094
Ruviano CE 8 1655 26749
Piedimonte Matese CE 9 11297 38046
San Salvatore Telesino BN 9 3999 42045
Castello del Matese CE 10 1494 43539
Amorosi BN 10 2797 46336
Cusano Mutri BN 11 4091 50427
San Lorenzello BN 12 2227 52654
Castel Campagnano CE 12 1581 54235
Caiazzo CE 12 5595 59830
San Gregorio Matese CE 12 988 60818
Liberi CE 12 1153 61971
Baia e Latina CE 13 2197 64168
Telese Terme BN 13 7486 71654
Cerreto Sannita BN 13 3940 75594
Castelvenere BN 13 2562 78156
Castel di Sasso CE 14 1171 79327
Piana di Monte Verna CE 14 2390 81717
Pietraroja BN 14 545 82262
Roccaromana CE 15 856 83118
Sant'Angelo d'Alife CE 15 2270 85388
Limatola BN 16 4073 89461
Melizzano BN 16 1858 91319
Pontelatone CE 16 1703 93022
Solopaca BN 16 3820 96842
Formicola CE 16 1488 98330
Raviscanina CE 17 1319 99649
Dugenta BN 17 2798 102447
Guardia Sanframondi BN 17 5078 107525
Frasso Telesino BN 17 2318 109843
Pietramelara CE 18 4722 114565
Castel Morrone CE 18 3858 118423
San Lorenzo Maggiore BN 19 2154 120577
Giano Vetusto CE 19 647 121224
Camigliano CE 19 1943 123167
Bellona CE 20 6053 129220
San Lupo BN 20 801 130021
Valle Agricola CE 20 890 130911

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km N of Caserta (76326 inhabitants)
36 Km W of Benevento (60091 inhabitants)
37 Km N of Acerra (59573 inhabitants)
38 Km NE of Aversa (53047 inhabitants)
41 Km N of Afragola (65057 inhabitants)
43 Km NE of Giugliano in Campania (122974 inhabitants)
43 Km N of Casoria (77642 inhabitants)
46 Km NE of Marano di Napoli (59874 inhabitants)
51 Km N of Napoli (974074 inhabitants)
51 Km N of Portici (55274 inhabitants)
53 Km NW of Avellino (54857 inhabitants)
53 Km N of Ercolano (53709 inhabitants)
55 Km NE of Pozzuoli (81661 inhabitants)
55 Km N of Torre del Greco (86275 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)
74 Km NW of Salerno (135261 inhabitants)
89 Km NW of Battipaglia (50786 inhabitants)
93 Km W of San Severo (53905 inhabitants)
97 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 2021-12-21
10:33:30		 41.2822 14.4022 5 2022-03-30
13:04:40		 Bollettino Sismico Italiano INGV 101725941
Reviewed
Rev100 		ML 1.4 2021-12-21
10:33:30		 41.3183 14.4062 10 2021-12-21
10:39:39		 Sala Sismica INGV-Roma 98786261
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-21 10:33:30 ± 0.21
Latitude 41.2822 ± 0.0063
Longitude 14.4022 ± 0.0072
Depth (km) 5 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 101725941

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 625
Semi-minor axis of confidence ellipse (meter) 402
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 140
Circular confidence region, given by single value of horizontal uncertainty (meter) 630.0
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 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.24
Epicentral distance of station closest to the epicenter (degree) 0.10612
Epicentral distance of station farthest from the epicenter (degree) 0.30037
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 98786261
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-21 10:39:39

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 8
Type of magnitude ML
Reference to an origin 101725941
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-06 09:47:57
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.BSSO.HNZ. 2021-12-21T10:33:42.51 0.6 undecidable manual S 29 33.3444 99 0.45 45
IV.SACR.HNZ. 2021-12-21T10:33:40.96 0.6 undecidable manual S 63 28.3494 100 0.61 43
IV.PIGN.HHZ. 2021-12-21T10:33:38.05 0.6 undecidable manual S 244 20.6682 104 0.31 47
IV.BSSO.HNZ. 2021-12-21T10:33:36.97 0.3 undecidable manual P 29 33.3444 99 -0.14 72
IV.SACR.HNZ. 2021-12-21T10:33:36.05 0.3 undecidable manual P 63 28.3494 100 -0.07 74
IV.PAOL.HHZ. 2021-12-21T10:33:36.91 0.3 undecidable manual P 154 31.0467 100 0.25 71
IV.PTRJ.HHZ. 2021-12-21T10:33:35.47 0.6 undecidable manual S 49 13.9749 110 -0.05 51
IV.VAGA.HHZ. 2021-12-21T10:33:34.66 0.3 undecidable manual P 317 20.3685 104 0.1 74
IV.VITU.HNZ. 2021-12-21T10:33:34.69 0.3 undecidable manual P 120 21.9669 103 -0.18 73
IV.PIGN.HHZ. 2021-12-21T10:33:34.47 0.3 undecidable manual P 244 20.6682 104 -0.15 74
IV.SGG.HHZ. 2021-12-21T10:33:34.88 0.6 undecidable manual S 351 11.7771 114 0.07 51
IV.SGG.HHZ. 2021-12-21T10:33:32.80 0.1 positive manual P 351 11.7771 114 -0.13 100
IV.PTRJ.HHZ. 2021-12-21T10:33:32.98 0.1 undecidable manual P 49 13.9749 110 -0.35 95
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SGG.HHN. ML:1.7 0.000714 1.68 AML other m 2021-12-21T10:33:35.89
IV.SGG.HHE. ML:1.5 0.000441 0.66 AML other m 2021-12-21T10:33:37.60
IV.PIGN.HHN. ML:1.1 0.00009095 0.94 AML other m 2021-12-21T10:33:41.55
IV.VAGA.HHE. ML:1.5 0.0002445 1.26 AML other m 2021-12-21T10:33:41.28
IV.PIGN.HHE. ML:1.2 0.00011245000000000001 0.44 AML other m 2021-12-21T10:33:41.34
IV.VAGA.HHN. ML:1.6 0.00033350000000000003 0.3 AML other m 2021-12-21T10:33:42.73
IV.PAOL.HHE. ML:1.4 0.0001119 0.32 AML other m 2021-12-21T10:33:43.18
IV.PAOL.HHN. ML:1.2 0.00008690000000000001 0.24 AML other m 2021-12-21T10:33:48.31
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