Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 1.5 on date 20-12-2021 and time 12:32:14 (Italy) in region 5 km W Gioia Sannitica (CE)

A magnitude ML 1.5 earthquake occured in region: 5 km W Gioia Sannitica (CE), on

  • 20-12-2021 11:32:14 (UTC)
  • 20-12-2021 12:32:14 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.2860, 14.3930 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 5 3638 3638
San Potito Sannitico CE 6 1925 5563
Alvignano CE 7 4824 10387
Alife CE 7 7616 18003
Dragoni CE 7 2108 20111
Faicchio BN 7 3634 23745
Piedimonte Matese CE 8 11297 35042
Ruviano CE 8 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
San Gregorio Matese CE 11 988 47324
Cusano Mutri BN 11 4091 51415
Liberi CE 12 1153 52568
Baia e Latina CE 12 2197 54765
Caiazzo CE 12 5595 60360
Castel Campagnano CE 13 1581 61941
San Lorenzello BN 13 2227 64168
Castel di Sasso CE 13 1171 65339
Cerreto Sannita BN 14 3940 69279
Telese Terme BN 14 7486 76765
Sant'Angelo d'Alife CE 14 2270 79035
Piana di Monte Verna CE 14 2390 81425
Castelvenere BN 14 2562 83987
Roccaromana CE 14 856 84843
Pietraroja BN 15 545 85388
Pontelatone CE 16 1703 87091
Raviscanina CE 16 1319 88410
Formicola CE 16 1488 89898
Limatola BN 16 4073 93971
Melizzano BN 17 1858 95829
Solopaca BN 17 3820 99649
Pietramelara CE 17 4722 104371
Dugenta BN 18 2798 107169
Guardia Sanframondi BN 18 5078 112247
Frasso Telesino BN 18 2318 114565
Castel Morrone CE 19 3858 118423
Camigliano CE 19 1943 120366
Giano Vetusto CE 19 647 121013
Valle Agricola CE 19 890 121903
Bellona CE 20 6053 127956
Ailano CE 20 1369 129325
Pastorano CE 20 3033 132358
Pietravairano CE 20 2984 135342
Vitulazio CE 20 7420 142762
San Lorenzo Maggiore BN 20 2154 144916

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)
94 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 1.5 2021-12-20
11:32:14		 41.2863 14.3933 9 2022-03-30
13:04:32		 Bollettino Sismico Italiano INGV 100008861
Reviewed
Rev100 		ML 1.9 2021-12-20
11:32:14		 41.292 14.3892 10 2021-12-20
11:37:49		 Sala Sismica INGV-Roma 98751681
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-20 11:32:14 ± 0.09
Latitude 41.2863 ± 0.0045
Longitude 14.3933 ± 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 100008861

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 531
Semi-minor axis of confidence ellipse (meter) 222
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 39
Circular confidence region, given by single value of horizontal uncertainty (meter) 530.0
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 18
Number of defining phases 17
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.45416
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 11
Magnitudes information

ML:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations 21
Type of magnitude ML
Reference to an origin 100008861
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-22 15:30:15

ML:1.9

Field Value
Value 1.9
Uncertainty 0.1
Num. used stations 6
Type of magnitude ML
Reference to an origin 98751681
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-20 11:37:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IX.CLT3.EHZ.02 2021-12-20T11:32:43.35 3.0 undecidable manual S -1.51 0
IV.MIDA.HHZ. 2021-12-20T11:32:28.43 0.6 undecidable manual S 344 41.1255 50 0.19 46
IV.RNI2.HNE. 2021-12-20T11:32:23.79 0.3 undecidable manual P 337 50.4162 50 0.02 71
IV.VITU.HHZ. 2021-12-20T11:32:23.12 0.6 undecidable manual S 120 22.8549 111 0.37 46
IV.CERA.HNN. 2021-12-20T11:32:23.75 0.3 undecidable manual P 318 46.5201 50 0.57 63
IV.VAGA.HHZ. 2021-12-20T11:32:21.66 0.3 undecidable manual S 317 19.4694 114 -0.03 75
IV.MIDA.HHZ. 2021-12-20T11:32:21.86 0.3 undecidable manual P 344 41.1255 50 -0.48 65
IV.PIGN.HHZ. 2021-12-20T11:32:21.60 0.6 undecidable manual S 242 20.1687 113 -0.31 47
IV.PAOL.HNZ. 2021-12-20T11:32:20.89 0.6 undecidable manual P 153 31.8459 105 0.01 49
IV.SACR.HHZ. 2021-12-20T11:32:20.26 0.3 undecidable manual P 65 28.749 107 -0.04 73
IV.BSSO.HHZ. 2021-12-20T11:32:20.90 0.3 undecidable manual P 30 33.3444 50 -0.24 70
IV.PTRJ.HHZ. 2021-12-20T11:32:20.47 0.6 undecidable manual S 53 14.1747 121 0.41 46
IV.SGG.HHZ. 2021-12-20T11:32:19.14 0.3 undecidable manual S 354 11.1777 128 -0.05 75
IV.VITU.HHZ. 2021-12-20T11:32:19.08 0.1 undecidable manual P 120 22.8549 111 -0.09 98
IV.PIGN.HHZ. 2021-12-20T11:32:18.76 0.1 undecidable manual P 242 20.1687 113 0.08 99
IV.VAGA.HHZ. 2021-12-20T11:32:18.89 0.3 undecidable manual P 317 19.4694 114 0.34 70
IV.PTRJ.HHZ. 2021-12-20T11:32:17.33 0.1 undecidable manual P 53 14.1747 121 -0.29 95
IV.SGG.HHZ. 2021-12-20T11:32:17.03 0.1 negative manual P 354 11.1777 128 -0.08 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SGG.HHN. ML:1.4 0.00036066355 0.1792 AML other m 2021-12-20T11:32:19.20
IV.SGG.HNN. ML:1.4 0.00030780655 0.1728 AML other m 2021-12-20T11:32:19.20
IV.VAGA.HNN. ML:1.4 0.00019833845 0.1536 AML other m 2021-12-20T11:32:21.41
IV.VAGA.HHN. ML:1.4 0.0002099493 0.1408 AML other m 2021-12-20T11:32:21.34
IV.PTRJ.HHE. ML:0.0 0.000010261125499999999 0.5376 AML other m 2021-12-20T11:32:21.68
IV.PTRJ.HHN. ML:2.0 0.0010640769999999999 0.3776 AML other m 2021-12-20T11:32:21.58
IV.VAGA.HNE. ML:1.3 0.00016644145 0.1664 AML other m 2021-12-20T11:32:21.71
IV.VAGA.HHE. ML:1.4 0.00017937025000000002 0.16 AML other m 2021-12-20T11:32:21.71
IV.SGG.HHE. ML:1.8 0.0007939062 0.2176 AML other m 2021-12-20T11:32:21.83
IV.SGG.HNE. ML:1.8 0.0008780909 0.2304 AML other m 2021-12-20T11:32:21.82
IV.VITU.HNE. ML:1.0 0.000062015585 0.2176 AML other m 2021-12-20T11:32:23.04
IV.VITU.HHE. ML:1.6 0.00025499315 0.544 AML other m 2021-12-20T11:32:23.28
IV.VITU.HNN. ML:1.7 0.00032572245 0.5632 AML other m 2021-12-20T11:32:23.25
IV.VITU.HHN. ML:1.7 0.00031097030000000003 0.5632 AML other m 2021-12-20T11:32:23.26
IV.BSSO.HHN. ML:1.1 0.000054052465 0.4224 AML other m 2021-12-20T11:32:26.14
IV.BSSO.HNE. ML:1.6 0.00017679275 0.64 AML other m 2021-12-20T11:32:28.55
IV.BSSO.HHE. ML:1.6 0.00016400614999999998 0.6784 AML other m 2021-12-20T11:32:28.54
IV.BSSO.HNN. ML:1.6 0.0001559247 0.64 AML other m 2021-12-20T11:32:29.80
IV.MIDA.HHN. ML:1.5 0.00010471358 0.48 AML other m 2021-12-20T11:32:32.05
IV.MIDA.HNE. ML:1.6 0.000120238135 0.4992 AML other m 2021-12-20T11:32:32.04
IV.MIDA.HHE. ML:1.4 0.00007667911999999998 0.3584 AML other m 2021-12-20T11:32:33.04
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