Earthquake with magnitude of ML 2.4 on date 11-01-2021 and time 12:37:27 (Italy) in region 1 km SE Bracigliano (SA)

A magnitude ML 2.4 earthquake occured in region: 1 km SE Bracigliano (SA), on

  • 11-01-2021 11:37:27 (UTC)
  • 11-01-2021 12:37:27 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.82, 14.72 at 6 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
Bracigliano SA 1 5565 5565
Siano SA 3 9979 15544
Montoro AV 4 19671 35215
Castel San Giorgio SA 5 13702 48917
Mercato San Severino SA 5 22322 71239
Forino AV 5 5384 76623
Roccapiemonte SA 7 9060 85683
Contrada AV 7 3053 88736
Quindici AV 8 1938 90674
Moschiano AV 8 1673 92347
Monteforte Irpino AV 8 11467 103814
Sarno SA 8 31529 135343
Fisciano SA 9 13820 149163
Baronissi SA 9 17003 166166
Nocera Superiore SA 9 24263 190429
Lauro AV 10 3509 193938
Taurano AV 10 1546 195484
San Valentino Torio SA 10 10947 206431
Nocera Inferiore SA 10 46043 252474
Calvanico SA 11 1518 253992
Pellezzano SA 11 10965 264957
Solofra AV 11 12495 277452
Mercogliano AV 12 12267 289719
Striano NA 12 8397 298116
Aiello del Sabato AV 12 3958 302074
Pagani SA 12 35834 337908
San Marzano sul Sarno SA 12 10442 348350
Avellino AV 13 54857 403207
Pago del Vallo di Lauro AV 13 1830 405037
Domicella AV 13 1862 406899
Cesinali AV 13 2584 409483
Cava de' Tirreni SA 13 53659 463142
Carbonara di Nola NA 13 2429 465571
Sant'Egidio del Monte Albino SA 13 8909 474480
San Michele di Serino AV 14 2530 477010
Ospedaletto d'Alpinolo AV 14 2145 479155
Serino AV 14 7034 486189
Santa Lucia di Serino AV 15 1402 487591
Palma Campania NA 15 15978 503569
Marzano di Nola AV 15 1727 505296
Mugnano del Cardinale AV 15 5373 510669
Corbara SA 15 2545 513214
Poggiomarino NA 15 21976 535190
Angri SA 15 34002 569192
Summonte AV 15 1583 570775
Atripalda AV 15 11020 581795
Tramonti SA 15 4171 585966
Castiglione del Genovesi SA 15 1383 587349
Santo Stefano del Sole AV 15 2208 589557
Liveri NA 16 1607 591164
Quadrelle AV 16 1865 593029
Visciano NA 16 4454 597483
Salerno SA 16 135261 732744
Capriglia Irpina AV 16 2398 735142
Sirignano AV 16 2933 738075
Vietri sul Mare SA 16 7902 745977
San Gennaro Vesuviano NA 16 11966 757943
San Mango Piemonte SA 17 2649 760592
Baiano AV 17 4718 765310
San Cipriano Picentino SA 17 6631 771941
San Paolo Bel Sito NA 18 3513 775454
Sperone AV 18 3706 779160
Sant'Angelo a Scala AV 18 730 779890
Manocalzati AV 18 3160 783050
San Giuseppe Vesuviano NA 18 30657 813707
Scafati SA 18 50787 864494
Sant'Antonio Abate NA 18 19743 884237
Montefredane AV 18 2297 886534
San Potito Ultra AV 18 1558 888092
Sorbo Serpico AV 18 583 888675
Grottolella AV 18 1869 890544
Volturara Irpina AV 18 3289 893833
Terzigno NA 18 18968 912801
Salza Irpina AV 19 772 913573
Avella AV 19 7890 921463
Casamarciano NA 19 3289 924752
Parolise AV 19 663 925415
Cetara SA 19 2141 927556
Candida AV 19 1147 928703
Lettere NA 19 6188 934891
Giffoni Sei Casali SA 19 5264 940155
Pietrastornina AV 19 1553 941708
Maiori SA 20 5573 947281
Pompei NA 20 25358 972639
Tufino NA 20 3776 976415
Nola NA 20 34431 1010846

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km SW of Avellino (54857 inhabitants)
13 Km N of Cava de' Tirreni (53659 inhabitants)
16 Km N of Salerno (135261 inhabitants)
18 Km E of Scafati (50787 inhabitants)
24 Km NE of Castellammare di Stabia (66466 inhabitants)
30 Km E of Torre del Greco (86275 inhabitants)
30 Km E of Portici (55274 inhabitants)
31 Km E of Ercolano (53709 inhabitants)
32 Km E of Acerra (59573 inhabitants)
33 Km NW of Battipaglia (50786 inhabitants)
35 Km S of Benevento (60091 inhabitants)
36 Km E of Afragola (65057 inhabitants)
37 Km E of Casoria (77642 inhabitants)
39 Km E of Napoli (974074 inhabitants)
43 Km SE of Caserta (76326 inhabitants)
45 Km E of Giugliano in Campania (122974 inhabitants)
45 Km E of Marano di Napoli (59874 inhabitants)
46 Km E of Aversa (53047 inhabitants)
53 Km E of Pozzuoli (81661 inhabitants)
94 Km W of Potenza (67122 inhabitants)
100 Km SW of Foggia (151991 inhabitants)
Recent and historical seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event *

This map reports the earthquake epicenters located in the 72 hours (3 days) preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located in the 90 days preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows 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 reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows 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 https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows 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 the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 2.4 2021-01-11
11:37:27
40.82 14.72 6 2021-01-11
14:36:26
Bollettino Sismico Italiano INGV 86173891
Reviewed
Rev100
ML 2.7 2021-01-11
11:37:25
41.13 14.54 18 2021-01-11
11:49:04
Sala Sismica INGV-Roma 86170661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-01-11 11:37:27 ± 0.09
Latitude 40.82 ± 0.01
Longitude 14.72 ± 0.00
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86173891

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 730
Semi-minor axis of confidence ellipse (meter) 622
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 342
Circular confidence region, given by single value of horizontal uncertainty (meter) 730
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 129
Number of associated phases, regardless of their use for origin computation 36
Number of defining phases 36
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) 0.11601
Epicentral distance of station farthest from the epicenter (degree) 0.95508
Number of stations at which the event was observed 27
Number of stations from which data was used for origin computation 27
Magnitudes information

ML:2.4

Field Value
Value 2.4
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 86173891
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-11 14:35:27

ML:2.7

Field Value
Value 2.7
Uncertainty 0.3
Num. used stations 12
Type of magnitude ML
Reference to an origin 86170661
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-01-11 11:49:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TRIV.HHZ. 2021-01-11T11:37:46.23 1.0 undecidable manual P 353 0.9551 50 0.6 19
IV.SNAL.HHZ. 2021-01-11T11:37:43.56 0.3 undecidable manual S 74 0.3867 50 1.28 47
IV.VULT.HNZ. 2021-01-11T11:37:42.00 1.0 undecidable manual P 78 0.6934 50 0.85 18
IV.CMPR.HHZ. 2021-01-11T11:37:41.16 0.6 undecidable manual P 138 0.67 50 0.4 42
IV.VAGA.HNZ. 2021-01-11T11:37:41.49 0.6 undecidable manual P 329 0.6979 50 0.26 43
IV.MCRV.HHZ. 2021-01-11T11:37:40.70 0.6 undecidable manual S 96 0.3435 99 0.07 49
IV.BSSO.HNZ. 2021-01-11T11:37:40.83 1.0 undecidable manual P 353 0.732 50 -0.99 17
IV.SGG.HNZ. 2021-01-11T11:37:39.85 0.6 undecidable manual P 336 0.6214 50 -0.07 46
IV.SGTA.HNZ. 2021-01-11T11:37:38.40 1.0 undecidable manual P 57 0.5819 50 -0.86 18
IX.CLT3.HHZ.02 2021-01-11T11:37:38.92 0.3 undecidable manual P 81 0.5261 50 0.62 61
IV.MRLC.HHZ. 2021-01-11T11:37:38.52 0.6 undecidable manual P 96 0.5882 50 -0.83 37
IV.CRTO.HHZ. 2021-01-11T11:37:37.04 0.3 undecidable manual S 271 0.2221 104 0.99 55
IX.COL3.HHZ.02 2021-01-11T11:37:37.07 0.3 undecidable manual P 106 0.4829 50 -0.49 65
IV.VPOB.HHZ. 2021-01-11T11:37:37.18 0.6 undecidable manual S 278 0.2545 102 -0.05 50
IV.SGO.HNZ. 2021-01-11T11:37:37.83 0.3 undecidable manual P 120 0.5171 50 -0.31 67
IV.VBKN.HHZ. 2021-01-11T11:37:36.16 0.3 undecidable manual S 273 0.2167 104 0.32 71
IV.CAFE.HHZ. 2021-01-11T11:37:36.87 0.3 undecidable manual P 62 0.4443 50 -0.03 72
IV.VCRE.HHZ. 2021-01-11T11:37:36.34 0.6 undecidable manual S 270 0.2158 104 0.55 45
IV.PSB1.HHZ. 2021-01-11T11:37:36.01 0.3 undecidable manual P 10 0.4101 50 -0.3 69
IV.VTIR.HHZ. 2021-01-11T11:37:36.14 0.6 undecidable manual S 267 0.2212 104 0.13 49
IV.SNAL.HHZ. 2021-01-11T11:37:35.66 0.3 undecidable manual P 74 0.3867 50 -0.26 70
IV.MCRV.HHZ. 2021-01-11T11:37:34.92 0.1 undecidable manual P 96 0.3435 99 -0.05 98
IV.NL9.EHZ. 2021-01-11T11:37:34.10 0.3 undecidable manual S 308 0.1646 108 0.21 73
IV.MRB1.HNZ. 2021-01-11T11:37:34.95 0.3 undecidable manual P 32 0.3579 99 -0.32 69
IX.NSC3.HNZ.02 2021-01-11T11:37:34.25 0.3 undecidable manual P 85 0.3076 100 0.07 73
IV.MTMR.HNN. 2021-01-11T11:37:33.26 0.3 undecidable manual P 65 0.2374 103 0.61 65
IX.LGS3.HNE.01 2021-01-11T11:37:33.66 0.6 undecidable manual P 51 0.2662 101 0.4 46
IV.VBKN.HHZ. 2021-01-11T11:37:32.02 0.1 negative manual P 273 0.2167 104 -0.18 97
IV.OVO.HHZ. 2021-01-11T11:37:32.28 0.3 undecidable manual P 272 0.2419 103 -0.46 69
IT.AVL.HNZ. 2021-01-11T11:37:32.20 0.3 undecidable manual S 27 0.116 115 0.03 77
IV.CRTO.HHZ. 2021-01-11T11:37:32.34 0.3 undecidable manual P 271 0.2221 104 0.02 75
IV.VTIR.HHZ. 2021-01-11T11:37:32.12 0.1 negative manual P 267 0.2212 104 -0.18 97
IV.VCRE.HHZ. 2021-01-11T11:37:32.00 0.1 undecidable manual P 270 0.2158 104 -0.17 98
IV.VPOB.HHZ. 2021-01-11T11:37:32.29 1.0 undecidable manual P 278 0.2545 102 -0.71 21
IV.NL9.EHZ. 2021-01-11T11:37:30.41 0.3 undecidable manual P 308 0.1646 108 -0.66 65
IT.AVL.HNZ. 2021-01-11T11:37:29.93 0.1 undecidable manual P 27 0.116 115 -0.15 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VTIR.HHN. ML:2.1 0.000838 0.28 AML other m 2021-01-11T11:37:37.98
IV.VTIR.HHE. ML:2.3 0.001245 0.28 AML other m 2021-01-11T11:37:39.56
IV.VBKN.HHE. ML:2.7 0.00342 0.18 AML other m 2021-01-11T11:37:39.90
IV.CRTO.HHE. ML:2.9 0.00482 0.42 AML other m 2021-01-11T11:37:41.52
IV.VBKN.HHN. ML:2.7 0.00312 0.58 AML other m 2021-01-11T11:37:42.87
IV.CRTO.HHN. ML:2.7 0.003485 0.5 AML other m 2021-01-11T11:37:43.93
IV.VCRE.HHE. ML:2.6 0.002885 0.54 AML other m 2021-01-11T11:37:44.50
IV.VCRE.HHN. ML:2.4 0.0018 0.56 AML other m 2021-01-11T11:37:44.10
IV.SNAL.HNN. ML:2.2 0.000504 0.42 AML other m 2021-01-11T11:37:46.92
IV.SNAL.HHN. ML:2.2 0.0005155 0.42 AML other m 2021-01-11T11:37:46.92
IV.SNAL.HHE. ML:2.2 0.0004585 0.92 AML other m 2021-01-11T11:37:57.81
IV.SNAL.HNE. ML:2.2 0.0004825 0.92 AML other m 2021-01-11T11:37:57.82
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol 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