Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.4 on date 20-12-2021 and time 13:15:11 (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 12:15:11 (UTC)
  • 20-12-2021 13:15:11 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.2860, 14.3980 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
Alvignano CE 7 4824 10387
Alife CE 7 7616 18003
Faicchio BN 7 3634 21637
Dragoni CE 8 2108 23745
Piedimonte Matese CE 8 11297 35042
Puglianello BN 8 1349 36391
Ruviano CE 8 1655 38046
Castello del Matese CE 9 1494 39540
San Salvatore Telesino BN 10 3999 43539
Amorosi BN 10 2797 46336
Cusano Mutri BN 11 4091 50427
San Gregorio Matese CE 11 988 51415
Liberi CE 12 1153 52568
San Lorenzello BN 12 2227 54795
Caiazzo CE 12 5595 60390
Castel Campagnano CE 12 1581 61971
Baia e Latina CE 12 2197 64168
Telese Terme BN 13 7486 71654
Cerreto Sannita BN 13 3940 75594
Castel di Sasso CE 14 1171 76765
Castelvenere BN 14 2562 79327
Piana di Monte Verna CE 14 2390 81717
Sant'Angelo d'Alife CE 14 2270 83987
Pietraroja BN 15 545 84532
Roccaromana CE 15 856 85388
Pontelatone CE 16 1703 87091
Formicola CE 16 1488 88579
Raviscanina CE 16 1319 89898
Limatola BN 16 4073 93971
Melizzano BN 17 1858 95829
Solopaca BN 17 3820 99649
Dugenta BN 17 2798 102447
Guardia Sanframondi BN 17 5078 107525
Pietramelara CE 18 4722 112247
Frasso Telesino BN 18 2318 114565
Castel Morrone CE 19 3858 118423
Giano Vetusto CE 19 647 119070
Camigliano CE 19 1943 121013
Valle Agricola CE 19 890 121903
San Lorenzo Maggiore BN 20 2154 124057
Bellona CE 20 6053 130110
Pastorano CE 20 3033 133143
Ailano CE 20 1369 134512

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)
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 N of Ercolano (53709 inhabitants)
53 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)
66 Km N of Castellammare di Stabia (66466 inhabitants)
70 Km NW of Cava de' Tirreni (53659 inhabitants)
74 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
12:15:11		 41.2862 14.3977 9 2022-03-30
13:04:41		 Bollettino Sismico Italiano INGV 102257771
Reviewed
Rev100 		ML 1.3 2021-12-20
12:15:12		 41.3033 14.3677 7 2021-12-20
12:21:22		 Sala Sismica INGV-Roma 98753121
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-20 12:15:11 ± 0.09
Latitude 41.2862 ± 0.0054
Longitude 14.3977 ± 0.0060
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 102257771

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 490
Semi-minor axis of confidence ellipse (meter) 408
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 219
Circular confidence region, given by single value of horizontal uncertainty (meter) 490.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 89
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
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) 0.10162
Epicentral distance of station farthest from the epicenter (degree) 0.42178
Number of stations at which the event was observed 10
Number of stations from which data was used for origin computation 10
Magnitudes information

ML:1.4

Field Value
Value 1.4
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 102257771
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-22 15:41:04

ML:1.3

Field Value
Value 1.3
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 98753121
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-20 12:21:22
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PAOL.HHN. 2021-12-20T12:15:22.53 0.6 undecidable manual S 153 31.6461 50 -0.49 44
IV.CERA.HNN. 2021-12-20T12:15:21.22 0.3 undecidable manual P 318 46.8198 50 0.68 60
IV.SACR.HNN. 2021-12-20T12:15:21.88 0.6 undecidable manual S 64 28.4493 107 -0.09 48
IV.VITU.HHZ. 2021-12-20T12:15:20.48 0.6 undecidable manual S 120 22.4553 112 0.46 45
IV.MIDA.HNZ. 2021-12-20T12:15:19.23 0.3 undecidable manual P 343 41.2254 50 -0.45 66
IV.VAGA.HHZ. 2021-12-20T12:15:19.06 0.6 undecidable manual S 317 19.7691 114 -0.09 49
IV.PIGN.HHZ. 2021-12-20T12:15:18.87 0.6 undecidable manual S 242 20.5683 113 -0.51 45
IV.BSSO.HHZ. 2021-12-20T12:15:18.35 0.3 undecidable manual P 29 33.1446 50 -0.08 72
IV.PAOL.HHN. 2021-12-20T12:15:18.37 0.3 undecidable manual P 153 31.6461 50 0.17 71
IV.SACR.HNN. 2021-12-20T12:15:17.77 0.3 undecidable manual P 64 28.4493 107 0.17 71
IV.PTRJ.HHZ. 2021-12-20T12:15:17.27 0.6 undecidable manual S 52 13.9749 122 -0.09 50
IV.PIGN.HHZ. 2021-12-20T12:15:16.24 0.1 undecidable manual P 242 20.5683 113 0.13 97
IV.VAGA.HHZ. 2021-12-20T12:15:16.35 0.3 undecidable manual P 317 19.7691 114 0.38 69
IV.SGG.HHZ. 2021-12-20T12:15:16.49 0.6 undecidable manual S 352 11.2776 128 -0.11 50
IV.VITU.HHZ. 2021-12-20T12:15:16.43 0.3 undecidable manual P 120 22.4553 112 -0.04 74
IV.SGG.HHZ. 2021-12-20T12:15:14.43 0.1 negative manual P 352 11.2776 128 -0.07 100
IV.PTRJ.HHZ. 2021-12-20T12:15:14.72 0.3 undecidable manual P 52 13.9749 122 -0.22 72
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SGG.HHN. ML:1.6 0.0005734999999999999 0.36 AML other m 2021-12-20T12:15:17.76
IV.SGG.HHE. ML:1.6 0.000481 0.34 AML other m 2021-12-20T12:15:18.44
IV.VITU.HHE. ML:1.4 0.00017999999999999998 0.7 AML other m 2021-12-20T12:15:22.66
IV.VITU.HHN. ML:1.5 0.0001985 0.42 AML other m 2021-12-20T12:15:22.11
IV.PIGN.HHE. ML:1.2 0.00012455 0.62 AML other m 2021-12-20T12:15:23.33
IV.VAGA.HHN. ML:1.5 0.00026049999999999994 0.74 AML other m 2021-12-20T12:15:23.72
IV.PIGN.HHN. ML:1.0 0.00007694999999999999 0.76 AML other m 2021-12-20T12:15:25.11
IV.BSSO.HHE. ML:1.3 0.00007905000000000001 0.44 AML other m 2021-12-20T12:15:26.03
IV.VAGA.HHE. ML:1.4 0.0001815 0.38 AML other m 2021-12-20T12:15:26.36
IV.BSSO.HHN. ML:1.2 0.00006665000000000001 0.76 AML other m 2021-12-20T12:15:27.52
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