Earthquake with magnitude of ML 2.3 on date 20-12-2021 and time 11:31:27 (UTC) in region 5 km S San Potito Sannitico (CE)

A magnitude ML 2.3 earthquake occured in region: 5 km S San Potito Sannitico (CE), on

  • 20-12-2021 11:31:27 (UTC)
  • 20-12-2021 12:31:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 41.2970, 14.3880 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
Piedimonte Matese CE 7 11297 24476
Dragoni CE 7 2108 26584
Alvignano CE 7 4824 31408
Castello del Matese CE 8 1494 32902
Faicchio BN 8 3634 36536
Ruviano CE 10 1655 38191
Puglianello BN 10 1349 39540
San Gregorio Matese CE 10 988 40528
San Salvatore Telesino BN 11 3999 44527
Cusano Mutri BN 11 4091 48618
Baia e Latina CE 11 2197 50815
Amorosi BN 12 2797 53612
Liberi CE 12 1153 54765
Sant'Angelo d'Alife CE 13 2270 57035
San Lorenzello BN 13 2227 59262
Caiazzo CE 13 5595 64857
Castel Campagnano CE 14 1581 66438
Castel di Sasso CE 14 1171 67609
Roccaromana CE 14 856 68465
Cerreto Sannita BN 14 3940 72405
Raviscanina CE 15 1319 73724
Telese Terme BN 15 7486 81210
Pietraroja BN 15 545 81755
Piana di Monte Verna CE 15 2390 84145
Castelvenere BN 15 2562 86707
Formicola CE 16 1488 88195
Pontelatone CE 16 1703 89898
Pietramelara CE 17 4722 94620
Limatola BN 17 4073 98693
Solopaca BN 18 3820 102513
Melizzano BN 18 1858 104371
Valle Agricola CE 18 890 105261
Guardia Sanframondi BN 18 5078 110339
Ailano CE 19 1369 111708
Dugenta BN 19 2798 114506
Pietravairano CE 19 2984 117490
Giano Vetusto CE 19 647 118137
Frasso Telesino BN 19 2318 120455
Camigliano CE 19 1943 122398
Castel Morrone CE 20 3858 126256
Campochiaro CB 20 646 126902
Pastorano CE 20 3033 129935

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km N of Caserta (76326 inhabitants)
38 Km NW of Benevento (60091 inhabitants)
39 Km NE of Aversa (53047 inhabitants)
39 Km N of Acerra (59573 inhabitants)
42 Km N of Afragola (65057 inhabitants)
44 Km NE of Giugliano in Campania (122974 inhabitants)
44 Km N of Casoria (77642 inhabitants)
47 Km NE of Marano di Napoli (59874 inhabitants)
52 Km N of Napoli (974074 inhabitants)
53 Km N of Portici (55274 inhabitants)
54 Km N of Ercolano (53709 inhabitants)
55 Km NW of Avellino (54857 inhabitants)
56 Km NE of Pozzuoli (81661 inhabitants)
57 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)
98 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 2.3 2021-12-20
11:31:27
41.2967 14.3877 9 2022-03-30
13:04:32
Bollettino Sismico Italiano INGV 100008851
Reviewed
Rev100
ML 2.3 2021-12-20
11:31:28
41.3023 14.3712 8 2021-12-20
11:37:14
Sala Sismica INGV-Roma 98751651
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-20 11:31:27 ± 0.09
Latitude 41.2967 ± 0.0063
Longitude 14.3877 ± 0.0072
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 100008851

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 528
Semi-minor axis of confidence ellipse (meter) 446
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 15
Circular confidence region, given by single value of horizontal uncertainty (meter) 540.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 63
Number of associated phases, regardless of their use for origin computation 29
Number of defining phases 28
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.80849
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 20
Magnitudes information

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 44
Type of magnitude ML
Reference to an origin 100008851
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2022-03-22 15:23:18

ML:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 44
Type of magnitude ML
Reference to an origin 98751651
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-20 11:37:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IX.SCL3.EHZ.02 2021-12-20T11:31:46.09 3.0 positive manual P -2.04 0
IV.VVLD.HHZ. 2021-12-20T11:31:43.07 0.3 undecidable manual P 315 0.8085 50 -0.33 61
IV.LRP.EHN. 2021-12-20T11:31:42.51 0.3 undecidable manual P 301 0.6943 50 1.06 47
IV.PSB1.HHZ. 2021-12-20T11:31:40.81 0.6 undecidable manual S 103 0.3265 50 0.31 45
IV.POFI.HNE. 2021-12-20T11:31:40.61 0.3 undecidable manual P 310 0.6574 50 -0.21 64
IV.CAAM.HHN. 2021-12-20T11:31:39.41 0.6 undecidable manual P 201 0.5108 50 1.1 32
IV.BSSO.HHZ. 2021-12-20T11:31:39.88 0.6 undecidable manual S 32 0.2932 50 0.36 45
IV.MRB1.HHZ. 2021-12-20T11:31:38.34 0.6 undecidable manual P 112 0.4694 50 0.74 38
IV.SACR.HHZ. 2021-12-20T11:31:38.90 0.3 undecidable manual S 67 0.2590 107 0.65 62
IV.VVDG.HHE. 2021-12-20T11:31:38.34 0.6 undecidable manual P 177 0.4614 50 0.88 36
IV.TST01.HHZ. 2021-12-20T11:31:37.19 0.3 undecidable manual P 360 0.4515 50 -0.1 69
IV.GATE.HNN. 2021-12-20T11:31:37.27 0.3 undecidable manual P 61 0.4479 50 0.05 69
IV.CERA.HHZ. 2021-12-20T11:31:36.65 0.1 undecidable manual P 318 0.4092 50 0.09 93
IV.RNI2.HHZ. 2021-12-20T11:31:36.79 0.3 undecidable manual P 337 0.4425 50 -0.35 65
IV.VITU.HHZ. 2021-12-20T11:31:36.63 0.6 undecidable manual S 122 0.2149 110 0 49
IV.PIGN.HHZ. 2021-12-20T11:31:35.54 0.6 undecidable manual S 238 0.1835 113 0.02 49
IV.VAGA.HHZ. 2021-12-20T11:31:35.10 0.6 undecidable manual S 316 0.1655 115 0.23 47
IV.MIDA.HHZ. 2021-12-20T11:31:35.11 0.3 undecidable manual P 344 0.3588 50 -0.6 62
IV.PAOL.HHZ. 2021-12-20T11:31:34.21 0.3 undecidable manual P 153 0.2977 50 -0.45 66
IV.BSSO.HHZ. 2021-12-20T11:31:34.35 0.1 positive manual P 32 0.2932 50 -0.23 92
IV.PSB1.HHZ. 2021-12-20T11:31:34.88 0.3 undecidable manual P 103 0.3265 50 -0.27 68
IV.PTRJ.HHZ. 2021-12-20T11:31:33.95 0.6 undecidable manual S 58 0.1259 122 0.42 46
IV.SACR.HHZ. 2021-12-20T11:31:33.60 0.1 positive manual P 67 0.2590 107 -0.25 92
IV.SGG.HHZ. 2021-12-20T11:31:32.65 0.6 undecidable manual S 356 0.0899 131 0.22 48
IV.VITU.HHZ. 2021-12-20T11:31:32.37 0.1 undecidable manual P 122 0.2149 110 -0.54 87
IV.PIGN.HHZ. 2021-12-20T11:31:32.21 0.1 positive manual P 238 0.1835 113 -0.06 97
IV.VAGA.HHZ. 2021-12-20T11:31:31.97 0.1 undecidable manual P 316 0.1655 115 0.07 97
IV.SGG.HHZ. 2021-12-20T11:31:30.47 0.1 negative manual P 356 0.0899 131 -0.02 100
IV.PTRJ.HHZ. 2021-12-20T11:31:30.82 0.1 positive manual P 58 0.1259 122 -0.3 94
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SGG.HNN. ML:2.6 0.004885 0.44 AML other m 2021-12-20T11:31:34.34
IV.SGG.HHN. ML:2.6 0.005015 0.42 AML other m 2021-12-20T11:31:34.33
IV.SGG.HHE. ML:2.6 0.004849999999999999 1.14 AML other m 2021-12-20T11:31:34.38
IV.SGG.HNE. ML:2.5 0.004575 1.14 AML other m 2021-12-20T11:31:34.39
IV.VITU.HHN. ML:2.6 0.0022949999999999997 0.48 AML other m 2021-12-20T11:31:38.26
IV.VITU.HNN. ML:2.6 0.0022800000000000003 0.48 AML other m 2021-12-20T11:31:38.26
IV.VITU.HHE. ML:2.5 0.0019199999999999998 0.3 AML other m 2021-12-20T11:31:38.82
IV.PIGN.HHE. ML:2.2 0.0010899999999999998 0.56 AML other m 2021-12-20T11:31:39.09
IV.PIGN.HNE. ML:2.1 0.001009 0.54 AML other m 2021-12-20T11:31:39.09
IV.VAGA.HNE. ML:2.4 0.0022800000000000003 1 AML other m 2021-12-20T11:31:39.72
IV.VAGA.HHE. ML:2.4 0.0023850000000000004 1 AML other m 2021-12-20T11:31:39.72
IV.VAGA.HHN. ML:2.8 0.004875 0.5 AML other m 2021-12-20T11:31:40.61
IV.VAGA.HNN. ML:2.8 0.004695 0.5 AML other m 2021-12-20T11:31:40.61
IV.PAOL.HHE. ML:2.4 0.001175 0.4 AML other m 2021-12-20T11:31:40.97
IV.PAOL.HNE. ML:2.4 0.0011065 0.38 AML other m 2021-12-20T11:31:40.97
IV.PIGN.HNN. ML:1.9 0.0006835 0.7 AML other m 2021-12-20T11:31:41.58
IV.PIGN.HHN. ML:2.0 0.0007095000000000001 0.7 AML other m 2021-12-20T11:31:41.59
IV.SACR.HHE. ML:2.4 0.0012350000000000002 1.32 AML other m 2021-12-20T11:31:41.69
IV.SACR.HNE. ML:2.4 0.0012250000000000002 1.32 AML other m 2021-12-20T11:31:41.03
IV.VITU.HNE. ML:2.1 0.0007655000000000001 1.1 AML other m 2021-12-20T11:31:41.98
IV.SACR.HHN. ML:2.1 0.0007325 0.6 AML other m 2021-12-20T11:31:42.35
IV.BSSO.HHE. ML:2.3 0.0009570000000000001 0.42 AML other m 2021-12-20T11:31:42.52
IV.BSSO.HNE. ML:2.3 0.000954 0.42 AML other m 2021-12-20T11:31:42.52
IV.BSSO.HHN. ML:2.3 0.000984 1.52 AML other m 2021-12-20T11:31:42.14
IV.BSSO.HNN. ML:2.3 0.0009545 1.5 AML other m 2021-12-20T11:31:42.15
IV.PSB1.HHN. ML:2.2 0.0006039999999999999 0.78 AML other m 2021-12-20T11:31:43.68
IV.PSB1.HNN. ML:2.2 0.000607 0.8 AML other m 2021-12-20T11:31:43.69
IV.PAOL.HNN. ML:2.2 0.000747 0.72 AML other m 2021-12-20T11:31:43.76
IV.PAOL.HHN. ML:2.2 0.0007794999999999999 0.74 AML other m 2021-12-20T11:31:43.76
IV.SACR.HNN. ML:2.2 0.0007545 0.42 AML other m 2021-12-20T11:31:43.86
IV.PSB1.HHE. ML:2.2 0.0005545 1.4 AML other m 2021-12-20T11:31:43.17
IV.PSB1.HNE. ML:2.1 0.000546 1.42 AML other m 2021-12-20T11:31:43.88
IV.MIDA.HHE. ML:2.0 0.00037749999999999996 0.88 AML other m 2021-12-20T11:31:45.04
IV.MIDA.HHN. ML:2.2 0.0005425 0.76 AML other m 2021-12-20T11:31:47.63
IV.MIDA.HNE. ML:2.2 0.0005480000000000001 0.76 AML other m 2021-12-20T11:31:47.63
IV.MIDA.HNN. ML:2.1 0.0004575 0.98 AML other m 2021-12-20T11:31:47.92
IV.RNI2.HHE. ML:2.4 0.0006129999999999999 0.98 AML other m 2021-12-20T11:31:52.47
IV.RNI2.HNE. ML:2.4 0.0006274999999999999 0.98 AML other m 2021-12-20T11:31:52.48
IV.CERA.HHE. ML:2.2 0.0005204999999999999 0.54 AML other m 2021-12-20T11:31:53.16
IV.CERA.HNE. ML:2.2 0.000496 0.56 AML other m 2021-12-20T11:31:53.16
IV.CERA.HHN. ML:2.2 0.0005340000000000001 1.5 AML other m 2021-12-20T11:31:53.20
IV.CERA.HNN. ML:2.2 0.000528 1.5 AML other m 2021-12-20T11:31:53.20
IV.RNI2.HHN. ML:2.1 0.00035299999999999996 0.7 AML other m 2021-12-20T11:31:59.59
IV.RNI2.HNN. ML:2.1 0.0003325 0.68 AML other m 2021-12-20T11:31:59.60
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