Earthquake with magnitude of ML 1.2 on date 20-12-2021 and time 10:46:52 (Italy) in region 4 km SW Gioia Sannitica (CE)

A magnitude ML 1.2 earthquake occured in region: 4 km SW Gioia Sannitica (CE), on

  • 20-12-2021 09:46:52 (UTC)
  • 20-12-2021 10:46:52 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.2720, 14.4170 at 7 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
Faicchio BN 5 3634 7272
Puglianello BN 6 1349 8621
Ruviano CE 7 1655 10276
Alvignano CE 7 4824 15100
San Salvatore Telesino BN 8 3999 19099
San Potito Sannitico CE 8 1925 21024
Amorosi BN 8 2797 23821
Dragoni CE 9 2108 25929
Alife CE 9 7616 33545
Piedimonte Matese CE 10 11297 44842
Castel Campagnano CE 10 1581 46423
San Lorenzello BN 11 2227 48650
Cusano Mutri BN 11 4091 52741
Castello del Matese CE 11 1494 54235
Caiazzo CE 11 5595 59830
Telese Terme BN 11 7486 67316
Castelvenere BN 12 2562 69878
Cerreto Sannita BN 12 3940 73818
Liberi CE 12 1153 74971
San Gregorio Matese CE 13 988 75959
Piana di Monte Verna CE 13 2390 78349
Castel di Sasso CE 14 1171 79520
Pietraroja BN 14 545 80065
Baia e Latina CE 14 2197 82262
Melizzano BN 14 1858 84120
Solopaca BN 14 3820 87940
Limatola BN 15 4073 92013
Dugenta BN 15 2798 94811
Guardia Sanframondi BN 16 5078 99889
Frasso Telesino BN 16 2318 102207
Roccaromana CE 16 856 103063
Pontelatone CE 16 1703 104766
Sant'Angelo d'Alife CE 17 2270 107036
Formicola CE 17 1488 108524
Castel Morrone CE 17 3858 112382
San Lorenzo Maggiore BN 18 2154 114536
Raviscanina CE 18 1319 115855
San Lupo BN 18 801 116656
Pietramelara CE 19 4722 121378
Camigliano CE 20 1943 123321
Bellona CE 20 6053 129374

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NE of Caserta (76326 inhabitants)
34 Km W of Benevento (60091 inhabitants)
36 Km N of Acerra (59573 inhabitants)
38 Km NE of Aversa (53047 inhabitants)
40 Km N of Afragola (65057 inhabitants)
42 Km N of Casoria (77642 inhabitants)
42 Km NE of Giugliano in Campania (122974 inhabitants)
46 Km NE of Marano di Napoli (59874 inhabitants)
50 Km N of Napoli (974074 inhabitants)
50 Km N of Portici (55274 inhabitants)
51 Km NW of Avellino (54857 inhabitants)
52 Km N of Ercolano (53709 inhabitants)
54 Km N of Torre del Greco (86275 inhabitants)
54 Km NE of Pozzuoli (81661 inhabitants)
59 Km N of Scafati (50787 inhabitants)
64 Km N of Castellammare di Stabia (66466 inhabitants)
68 Km NW of Cava de' Tirreni (53659 inhabitants)
72 Km NW of Salerno (135261 inhabitants)
88 Km NW of Battipaglia (50786 inhabitants)
93 Km SW of San Severo (53905 inhabitants)
96 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 1.2 2021-12-20
09:46:52
41.2717 14.4167 7 2022-03-30
13:04:41
Bollettino Sismico Italiano INGV 102180751
Reviewed
Rev100
ML 1.3 2021-12-20
09:46:51
41.2315 14.4398 1 2021-12-20
09:50:59
Sala Sismica INGV-Roma 98749011
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-20 09:46:52 ± 0.1
Latitude 41.2717 ± 0.0045
Longitude 14.4167 ± 0.0048
Depth (km) 7 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 102180751

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 516
Semi-minor axis of confidence ellipse (meter) 139
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 148
Circular confidence region, given by single value of horizontal uncertainty (meter) 520.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 95
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.11871
Epicentral distance of station farthest from the epicenter (degree) 0.44157
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:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 6
Type of magnitude ML
Reference to an origin 98749011
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-20 09:50:59

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 102180751
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-20 12:05:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CERA.HNN. 2021-12-20T09:47:01.53 0.3 undecidable manual P 318 0.4416 50 -0.08 70
IV.VAGA.HHZ. 2021-12-20T09:47:00.37 0.6 undecidable manual S 316 0.1988 108 0.18 48
IV.PIGN.HHZ. 2021-12-20T09:46:59.68 0.6 undecidable manual S 248 0.1916 109 -0.27 47
IV.PAOL.HHN. 2021-12-20T09:46:58.31 0.6 undecidable manual P 155 0.2662 104 0.08 48
IV.BSSO.HHE. 2021-12-20T09:46:58.96 0.3 undecidable manual P 26 0.3049 102 -0.12 71
IV.SGG.HHZ. 2021-12-20T09:46:57.20 0.6 undecidable manual S 346 0.1187 119 -0.15 49
IV.SACR.HNN. 2021-12-20T09:46:57.98 0.6 undecidable manual P 60 0.2509 105 0.07 48
IV.VAGA.HHZ. 2021-12-20T09:46:57.18 0.3 undecidable manual P 316 0.1988 108 0.39 69
IV.PTRJ.HHZ. 2021-12-20T09:46:57.69 0.6 undecidable manual S 42 0.1250 118 0.11 49
IV.PIGN.HHZ. 2021-12-20T09:46:56.74 0.3 undecidable manual P 248 0.1916 109 0.09 73
IV.PTRJ.HHZ. 2021-12-20T09:46:55.25 0.1 undecidable manual P 42 0.1250 118 -0.03 100
IV.SGG.HHZ. 2021-12-20T09:46:54.96 0.1 undecidable manual P 346 0.1187 119 -0.19 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SGG.HHN. ML:1.4 0.000316 0.52 AML other m 2021-12-20T09:46:58.62
IV.SGG.HHE. ML:1.4 0.00029000000000000006 1.66 AML other m 2021-12-20T09:46:59.85
IV.VAGA.HHE. ML:1.2 0.0001225 0.3 AML other m 2021-12-20T09:47:02.22
IV.PIGN.HHE. ML:1.0 0.00006470000000000001 0.68 AML other m 2021-12-20T09:47:02.20
IV.PIGN.HHN. ML:0.9 0.0000552 0.44 AML other m 2021-12-20T09:47:03.41
IV.VAGA.HHN. ML:1.4 0.00016849999999999998 1.74 AML other m 2021-12-20T09:47:05.07
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