Earthquake with magnitude of Md 1.0 on date 16-12-2020 and time 17:25:01 (UTC) in region 4 km S Somma Vesuviana (NA)

A magnitude Md 1.0 earthquake occured in region: 4 km S Somma Vesuviana (NA), on

  • 16-12-2020 17:25:01 (UTC)
  • 16-12-2020 18:25:01 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.83, 14.43 at 0 km depth.

The earthquake was located by: Sala Operativa INGV_OV (Napoli).

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
Massa di Somma NA 4 5444 5444
Somma Vesuviana NA 4 35233 40677
Sant'Anastasia NA 5 27671 68348
San Sebastiano al Vesuvio NA 5 9196 77544
Ottaviano NA 5 23860 101404
Pollena Trocchia NA 5 13562 114966
Portici NA 6 55274 170240
Cercola NA 7 18267 188507
Terzigno NA 7 18968 207475
Trecase NA 7 9097 216572
Boscotrecase NA 7 10363 226935
San Giuseppe Vesuviano NA 7 30657 257592
Torre del Greco NA 7 86275 343867
Ercolano NA 7 53709 397576
Boscoreale NA 7 28072 425648
San Giorgio a Cremano NA 8 45557 471205
Torre Annunziata NA 8 42789 513994
Volla NA 9 23755 537749
Pomigliano d'Arco NA 9 39922 577671
San Gennaro Vesuviano NA 9 11966 589637
Castello di Cisterna NA 10 7869 597506
Brusciano NA 10 16466 613972
Poggiomarino NA 10 21976 635948
Mariglianella NA 11 7787 643735
Marigliano NA 11 30157 673892
Scisciano NA 11 5994 679886
Pompei NA 11 25358 705244
Casalnuovo di Napoli NA 11 49855 755099
San Vitaliano NA 11 6461 761560
Saviano NA 12 15982 777542
Palma Campania NA 12 15978 793520
Scafati SA 13 50787 844307
Striano NA 13 8397 852704
Carbonara di Nola NA 14 2429 855133
Nola NA 14 34431 889564
Acerra NA 14 59573 949137
San Paolo Bel Sito NA 14 3513 952650
Casoria NA 14 77642 1030292
Afragola NA 14 65057 1095349
Santa Maria la Carità NA 14 11722 1107071
Liveri NA 14 1607 1108678
Domicella AV 15 1862 1110540
Napoli NA 15 974074 2084614
Cimitile NA 15 7280 2091894
Casavatore NA 15 18661 2110555
San Marzano sul Sarno SA 15 10442 2120997
Marzano di Nola AV 15 1727 2122724
San Valentino Torio SA 15 10947 2133671
Angri SA 15 34002 2167673
Casamarciano NA 16 3289 2170962
Sant'Antonio Abate NA 16 19743 2190705
Castellammare di Stabia NA 16 66466 2257171
Arzano NA 16 34886 2292057
Camposano NA 16 5333 2297390
Sarno SA 16 31529 2328919
Pago del Vallo di Lauro AV 17 1830 2330749
Cardito NA 17 22755 2353504
Visciano NA 17 4454 2357958
Comiziano NA 17 1814 2359772
Lettere NA 17 6188 2365960
Casola di Napoli NA 17 3898 2369858
Caivano NA 18 37879 2407737
Gragnano NA 18 29136 2436873
Frattamaggiore NA 18 30329 2467202
Cicciano NA 18 12906 2480108
Sant'Egidio del Monte Albino SA 18 8909 2489017
Crispano NA 18 12354 2501371
Lauro AV 18 3509 2504880
Tufino NA 18 3776 2508656
Grumo Nevano NA 18 18061 2526717
Corbara SA 18 2545 2529262
Vico Equense NA 18 20969 2550231
Taurano AV 19 1546 2551777
Casandrino NA 19 14336 2566113
Pimonte NA 19 5980 2572093
Frattaminore NA 19 16208 2588301
Pagani SA 19 35834 2624135
Quindici AV 19 1938 2626073
Melito di Napoli NA 19 37826 2663899
Sant'Antimo NA 20 33905 2697804
Roccarainola NA 20 7082 2704886

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km E of Portici (55274 inhabitants)
7 Km NE of Torre del Greco (86275 inhabitants)
7 Km E of Ercolano (53709 inhabitants)
13 Km NW of Scafati (50787 inhabitants)
14 Km SE of Acerra (59573 inhabitants)
14 Km SE of Casoria (77642 inhabitants)
14 Km SE of Afragola (65057 inhabitants)
15 Km E of Napoli (974074 inhabitants)
16 Km N of Castellammare di Stabia (66466 inhabitants)
21 Km E of Marano di Napoli (59874 inhabitants)
22 Km SE of Giugliano in Campania (122974 inhabitants)
24 Km SE of Aversa (53047 inhabitants)
28 Km NW of Cava de' Tirreni (53659 inhabitants)
28 Km E of Pozzuoli (81661 inhabitants)
28 Km S of Caserta (76326 inhabitants)
33 Km W of Avellino (54857 inhabitants)
33 Km NW of Salerno (135261 inhabitants)
45 Km SW of Benevento (60091 inhabitants)
53 Km W of Battipaglia (50786 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled 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
Reviewed
Rev200
Md 1.0 2020-12-16
17:25:01
40.83 14.43 0 2020-12-16
18:02:50
Sala Operativa INGV_OV (Napoli) 85475731
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-16 17:25:01
Latitude 40.83
Longitude 14.43
Depth (km) 0 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-OV#WinPick
Event type earthquake
Origin ID 85475731

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 200
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 144
Number of associated phases, regardless of their use for origin computation 1
Number of defining phases 1
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.08
Epicentral distance of station closest to the epicenter (degree)
Epicentral distance of station farthest from the epicenter (degree)
Number of stations at which the event was observed 0
Number of stations from which data was used for origin computation 0
Magnitude information

Md:1

Field Value
Value 1
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 85475731
Agency INGV
Autore Sala Operativa INGV_OV (Napoli)
Time of creation (UTC) 2020-12-16 18:02:50
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download