Earthquake with magnitude of ML 2.1 on date 20-12-2021 and time 11:10:08 (Italy) in region 5 km W Gioia Sannitica (CE)

A magnitude ML 2.1 earthquake occured in region: 5 km W Gioia Sannitica (CE), on

  • 20-12-2021 10:10:08 (UTC)
  • 20-12-2021 11:10:08 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.2920, 14.3850 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.

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 5 1925 5563
Alife CE 6 7616 13179
Alvignano CE 7 4824 18003
Dragoni CE 7 2108 20111
Piedimonte Matese CE 7 11297 31408
Faicchio BN 8 3634 35042
Castello del Matese CE 9 1494 36536
Ruviano CE 9 1655 38191
Puglianello BN 9 1349 39540
San Gregorio Matese CE 11 988 40528
San Salvatore Telesino BN 11 3999 44527
Baia e Latina CE 11 2197 46724
Liberi CE 11 1153 47877
Amorosi BN 12 2797 50674
Cusano Mutri BN 12 4091 54765
Caiazzo CE 13 5595 60360
Sant'Angelo d'Alife CE 13 2270 62630
San Lorenzello BN 13 2227 64857
Castel di Sasso CE 13 1171 66028
Castel Campagnano CE 13 1581 67609
Roccaromana CE 14 856 68465
Piana di Monte Verna CE 14 2390 70855
Cerreto Sannita BN 14 3940 74795
Telese Terme BN 15 7486 82281
Raviscanina CE 15 1319 83600
Castelvenere BN 15 2562 86162
Pietraroja BN 15 545 86707
Pontelatone CE 16 1703 88410
Formicola CE 16 1488 89898
Limatola BN 17 4073 93971
Pietramelara CE 17 4722 98693
Melizzano BN 18 1858 100551
Solopaca BN 18 3820 104371
Valle Agricola CE 18 890 105261
Dugenta BN 18 2798 108059
Guardia Sanframondi BN 18 5078 113137
Giano Vetusto CE 19 647 113784
Ailano CE 19 1369 115153
Pietravairano CE 19 2984 118137
Camigliano CE 19 1943 120080
Frasso Telesino BN 19 2318 122398
Castel Morrone CE 19 3858 126256
Bellona CE 20 6053 132309
Pastorano CE 20 3033 135342
Vitulazio CE 20 7420 142762
Riardo CE 20 2321 145083
Rocchetta e Croce CE 20 460 145543

Municipalities with at least 50000 inhabitants

An earthquake occurred to
24 Km N of Caserta (76326 inhabitants)
38 Km W of Benevento (60091 inhabitants)
38 Km NE of Aversa (53047 inhabitants)
38 Km N of Acerra (59573 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)
62 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)
94 Km W of San Severo (53905 inhabitants)
99 Km W of Foggia (151991 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 2.1 2021-12-20
10:10:08
41.2918 14.3852 9 2022-03-30
13:04:32
Bollettino Sismico Italiano INGV 100008721
Reviewed
Rev100
ML 2.1 2021-12-20
10:10:08
41.2905 14.3673 6 2021-12-20
10:21:14
Sala Sismica INGV-Roma 98749741
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-20 10:10:08 ± 0.09
Latitude 41.2918 ± 0.0054
Longitude 14.3852 ± 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 100008721

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 551
Semi-minor axis of confidence ellipse (meter) 276
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 29
Circular confidence region, given by single value of horizontal uncertainty (meter) 550.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 28
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.32
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.81119
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 42
Type of magnitude ML
Reference to an origin 98749741
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-20 10:21:14

ML:2.1

Field Value
Value 2.1
Uncertainty 0.2
Num. used stations 44
Type of magnitude ML
Reference to an origin 100008721
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-22 15:09:36
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.RMP.HHZ. 2021-12-20T10:10:52.54 3.0 undecidable manual S -0.58 0
IV.MMO1.EHZ. 2021-12-20T10:10:42.23 3.0 positive manual Pg 2.85 0
IV.SGRT.HHZ. 2021-12-20T10:10:31.09 3.0 undecidable manual P 0.82 0
IV.VVLD.HHZ. 2021-12-20T10:10:24.06 0.6 undecidable manual P 316 0.8112 50 -0.12 42
IV.LRP.EHN. 2021-12-20T10:10:23.39 0.3 undecidable manual P 301 0.6952 50 1.19 44
IV.MIDA.HHZ. 2021-12-20T10:10:22.48 0.6 undecidable manual S 344 0.3633 50 0.14 46
IV.POFI.HNE. 2021-12-20T10:10:21.34 0.3 undecidable manual P 310 0.6592 50 -0.25 64
IV.PAOL.HHZ. 2021-12-20T10:10:20.60 0.3 undecidable manual S 152 0.2941 105 0.31 68
IV.BSSO.HHZ. 2021-12-20T10:10:20.66 0.6 undecidable manual S 32 0.2986 50 0.24 46
IV.SACR.HHZ. 2021-12-20T10:10:19.96 0.3 undecidable manual S 66 0.2626 106 0.84 57
IV.RNI2.HHZ. 2021-12-20T10:10:17.80 0.3 undecidable manual P 337 0.4470 50 -0.14 68
IV.VITU.HHZ. 2021-12-20T10:10:17.56 0.6 undecidable manual S 120 0.2140 110 0.23 47
IV.TST01.HHZ. 2021-12-20T10:10:17.82 0.3 undecidable manual P 0 0.4569 50 -0.3 66
IV.CERA.HHZ. 2021-12-20T10:10:17.49 0.3 undecidable manual P 318 0.4110 50 0.15 69
IV.PSB1.HHZ. 2021-12-20T10:10:16.34 0.3 undecidable manual P 102 0.3274 50 0.44 66
IV.BSSO.HHZ. 2021-12-20T10:10:15.19 0.1 positive manual P 32 0.2986 50 -0.22 93
IV.PAOL.HHZ. 2021-12-20T10:10:15.04 0.3 undecidable manual P 152 0.2941 105 -0.3 68
IV.VAGA.HHZ. 2021-12-20T10:10:15.98 0.3 undecidable manual S 318 0.1673 115 0.3 70
IV.MIDA.HHZ. 2021-12-20T10:10:15.88 0.3 undecidable manual P 344 0.3633 50 -0.64 61
IV.PIGN.HHZ. 2021-12-20T10:10:15.98 0.6 undecidable manual S 239 0.1799 113 -0.12 48
IV.SACR.HHZ. 2021-12-20T10:10:14.39 0.1 undecidable manual P 66 0.2626 106 -0.27 92
IV.PTRJ.HHZ. 2021-12-20T10:10:14.20 0.6 undecidable manual S 56 0.1295 121 -0.2 48
IV.PIGN.HHZ. 2021-12-20T10:10:13.00 0.1 undecidable manual P 239 0.1799 113 0.08 97
IV.SGG.HHZ. 2021-12-20T10:10:13.43 0.6 undecidable manual S 357 0.0944 129 0.14 49
IV.VITU.HHZ. 2021-12-20T10:10:13.22 0.3 undecidable manual P 120 0.2140 110 -0.41 68
IV.VAGA.HHZ. 2021-12-20T10:10:12.67 0.3 undecidable manual P 318 0.1673 115 0 74
IV.SGG.HHZ. 2021-12-20T10:10:11.33 0.1 negative manual P 357 0.0944 129 0.03 100
IV.PTRJ.HHZ. 2021-12-20T10:10:11.65 0.1 positive manual P 56 0.1295 121 -0.28 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SGG.HHN. ML:2.4 0.00296 0.5 AML other m 2021-12-20T10:10:14.99
IV.SGG.HNN. ML:2.4 0.002955 1.5 AML other m 2021-12-20T10:10:15.75
IV.SGG.HHE. ML:2.3 0.002922155 0.32 AML other m 2021-12-20T10:10:15.23
IV.SGG.HNE. ML:2.3 0.0028 0.34 AML other m 2021-12-20T10:10:15.23
IV.PTRJ.HHN. ML:2.5 0.003254904 0.416 AML other m 2021-12-20T10:10:16.35
IV.PTRJ.HHE. ML:1.0 0.00010345 0.52 AML other m 2021-12-20T10:10:17.18
IV.PIGN.HHE. ML:2.0 0.0007077445499999999 0.1408 AML other m 2021-12-20T10:10:19.50
IV.PIGN.HHN. ML:1.8 0.00051797535 0.3968 AML other m 2021-12-20T10:10:19.56
IV.PIGN.HNN. ML:1.8 0.00046896355 0.4224 AML other m 2021-12-20T10:10:19.76
IV.PIGN.HNE. ML:1.9 0.00064741125 0.6976 AML other m 2021-12-20T10:10:19.92
IV.VAGA.HHE. ML:2.2 0.00122194995 0.2176 AML other m 2021-12-20T10:10:20.34
IV.VAGA.HNE. ML:2.2 0.00115926395 0.1984 AML other m 2021-12-20T10:10:20.34
IV.PAOL.HNN. ML:2.1 0.00055631805 0.7488 AML other m 2021-12-20T10:10:21.60
IV.VAGA.HHN. ML:2.4 0.001966176 0.3008 AML other m 2021-12-20T10:10:21.46
IV.VAGA.HNN. ML:2.4 0.001897318 0.3008 AML other m 2021-12-20T10:10:21.46
IV.PAOL.HNE. ML:2.3 0.0008842949 0.3264 AML other m 2021-12-20T10:10:21.56
IV.PAOL.HHE. ML:2.3 0.0009710000000000001 0.34 AML other m 2021-12-20T10:10:21.73
IV.SACR.HHE. ML:2.1 0.0006635 0.62 AML other m 2021-12-20T10:10:22.53
IV.SACR.HHN. ML:2.0 0.0005255 1.46 AML other m 2021-12-20T10:10:22.13
IV.SACR.HNN. ML:2.0 0.0004709228 1.4688 AML other m 2021-12-20T10:10:22.14
IV.BSSO.HHE. ML:2.1 0.0005798738999999999 0.6592 AML other m 2021-12-20T10:10:23.16
IV.BSSO.HNE. ML:2.1 0.0005725 0.42 AML other m 2021-12-20T10:10:23.16
IV.BSSO.HHN. ML:2.0 0.000428 1.46 AML other m 2021-12-20T10:10:23.01
IV.PSB1.HNN. ML:2.0 0.0003565 0.82 AML other m 2021-12-20T10:10:24.50
IV.PSB1.HHN. ML:2.0 0.000376 0.8 AML other m 2021-12-20T10:10:24.49
IV.PAOL.HHN. ML:2.0 0.0005444911500000001 0.48 AML other m 2021-12-20T10:10:24.50
IV.PSB1.HHE. ML:2.0 0.0003705 0.82 AML other m 2021-12-20T10:10:24.25
IV.PSB1.HNE. ML:2.0 0.0003765 0.86 AML other m 2021-12-20T10:10:24.25
IV.MIDA.HHE. ML:1.8 0.000236 0.48 AML other m 2021-12-20T10:10:27.43
IV.MIDA.HHN. ML:2.0 0.00039200000000000004 0.72 AML other m 2021-12-20T10:10:28.17
IV.MIDA.HNE. ML:2.0 0.0003917522 0.7168 AML other m 2021-12-20T10:10:28.18
IV.SACR.HNE. ML:2.1 0.00064694505 0.4896 AML other m 2021-12-20T10:10:28.54
IV.BSSO.HNN. ML:2.0 0.000434 0.94 AML other m 2021-12-20T10:10:29.47
IV.RNI2.HNN. ML:1.9 0.00021309080000000004 0.4288 AML other m 2021-12-20T10:10:31.51
IV.RNI2.HHN. ML:1.9 0.000213 0.44 AML other m 2021-12-20T10:10:31.73
IV.RNI2.HHE. ML:2.1 0.000326 1.24 AML other m 2021-12-20T10:10:32.19
IV.RNI2.HNE. ML:2.1 0.0003239092 1.2544 AML other m 2021-12-20T10:10:32.19
IV.CERA.HHE. ML:2.1 0.00036231630000000005 0.6784 AML other m 2021-12-20T10:10:34.35
IV.CERA.HNE. ML:2.1 0.0003532185 0.6848 AML other m 2021-12-20T10:10:34.35
IV.MIDA.HNN. ML:2.0 0.0003096877 0.1376 AML other m 2021-12-20T10:10:34.39
IV.CERA.HHN. ML:2.0 0.0003255 1.58 AML other m 2021-12-20T10:10:34.01
IV.CERA.HNN. ML:2.0 0.00029452309999999997 1.5904 AML other m 2021-12-20T10:10:34.80
IV.SGRT.HHE. ML:2.0 0.000081181625 0.9952 AML other m 2021-12-20T10:10:50.42
IV.SGRT.HHN. ML:1.9 0.000058627134999999995 1.3824 AML other m 2021-12-20T10:11:05.21
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in miniseed + resp format Download