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.

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
Puglianello BN 8 1349 22986
Dragoni CE 8 2108 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
Liberi CE 12 1153 55388
Caiazzo CE 12 5595 60983
San Gregorio Matese CE 12 988 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
Sant'Angelo d'Alife CE 15 2270 84532
Roccaromana CE 15 856 85388
Limatola BN 16 4073 89461
Pontelatone CE 16 1703 91164
Melizzano BN 16 1858 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
Camigliano CE 19 1943 122520
Giano Vetusto CE 19 647 123167
San Lupo BN 20 801 123968
Bellona CE 20 6053 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

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
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 101725941
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-06 09:47:57

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
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.BSSO.HNZ. 2021-12-21T10:33:42.51 0.6 undecidable manual S 29 0.3004 99 0.45 45
IV.SACR.HNZ. 2021-12-21T10:33:40.96 0.6 undecidable manual S 63 0.2554 100 0.61 43
IV.PIGN.HHZ. 2021-12-21T10:33:38.05 0.6 undecidable manual S 244 0.1862 104 0.31 47
IV.SACR.HNZ. 2021-12-21T10:33:36.05 0.3 undecidable manual P 63 0.2554 100 -0.07 74
IV.PAOL.HHZ. 2021-12-21T10:33:36.91 0.3 undecidable manual P 154 0.2797 100 0.25 71
IV.BSSO.HNZ. 2021-12-21T10:33:36.97 0.3 undecidable manual P 29 0.3004 99 -0.14 72
IV.PTRJ.HHZ. 2021-12-21T10:33:35.47 0.6 undecidable manual S 49 0.1259 110 -0.05 51
IV.PIGN.HHZ. 2021-12-21T10:33:34.47 0.3 undecidable manual P 244 0.1862 104 -0.15 74
IV.VITU.HNZ. 2021-12-21T10:33:34.69 0.3 undecidable manual P 120 0.1979 103 -0.18 73
IV.SGG.HHZ. 2021-12-21T10:33:34.88 0.6 undecidable manual S 351 0.1061 114 0.07 51
IV.VAGA.HHZ. 2021-12-21T10:33:34.66 0.3 undecidable manual P 317 0.1835 104 0.1 74
IV.PTRJ.HHZ. 2021-12-21T10:33:32.98 0.1 undecidable manual P 49 0.1259 110 -0.35 95
IV.SGG.HHZ. 2021-12-21T10:33:32.80 0.1 positive manual P 351 0.1061 114 -0.13 100
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
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