Earthquake with magnitude of Md 1.1 on date 11-12-2018 and time 22:56:05 (Italy) in region 5 km SE Massa di Somma (NA)

A magnitude Md 1.1 earthquake occured in region: 5 km SE Massa di Somma (NA), on

  • 11-12-2018 21:56:05 (UTC)
  • 11-12-2018 22:56:05 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.83, 14.43 at 0 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
Massa di Somma NA 5 5444 5444
San Sebastiano al Vesuvio NA 5 9196 14640
Somma Vesuviana NA 5 35233 49873
Ottaviano NA 5 23860 73733
Sant'Anastasia NA 5 27671 101404
Pollena Trocchia NA 6 13562 114966
Trecase NA 6 9097 124063
Boscotrecase NA 6 10363 134426
Portici NA 6 55274 189700
Terzigno NA 6 18968 208668
Torre del Greco NA 7 86275 294943
Boscoreale NA 7 28072 323015
San Giuseppe Vesuviano NA 7 30657 353672
Cercola NA 7 18267 371939
Ercolano NA 7 53709 425648
Torre Annunziata NA 8 42789 468437
San Giorgio a Cremano NA 8 45557 513994
Volla NA 9 23755 537749
San Gennaro Vesuviano NA 10 11966 549715
Pomigliano d'Arco NA 10 39922 589637
Poggiomarino NA 10 21976 611613
Castello di Cisterna NA 10 7869 619482
Pompei NA 11 25358 644840
Brusciano NA 11 16466 661306
Mariglianella NA 11 7787 669093
Scisciano NA 11 5994 675087
Marigliano NA 12 30157 705244
Palma Campania NA 12 15978 721222
San Vitaliano NA 12 6461 727683
Casalnuovo di Napoli NA 12 49855 777538
Scafati SA 12 50787 828325
Saviano NA 12 15982 844307
Striano NA 13 8397 852704
Santa Maria la Carità NA 14 11722 864426
Carbonara di Nola NA 14 2429 866855
San Paolo Bel Sito NA 14 3513 870368
Nola NA 14 34431 904799
Acerra NA 14 59573 964372
Casoria NA 15 77642 1042014
Afragola NA 15 65057 1107071
Liveri NA 15 1607 1108678
San Marzano sul Sarno SA 15 10442 1119120
Domicella AV 15 1862 1120982
Napoli NA 15 974074 2095056
Angri SA 15 34002 2129058
San Valentino Torio SA 15 10947 2140005
Castellammare di Stabia NA 15 66466 2206471
Sant'Antonio Abate NA 15 19743 2226214
Casavatore NA 15 18661 2244875
Cimitile NA 15 7280 2252155
Marzano di Nola AV 16 1727 2253882
Casamarciano NA 16 3289 2257171
Sarno SA 16 31529 2288700
Arzano NA 16 34886 2323586
Lettere NA 17 6188 2329774
Casola di Napoli NA 17 3898 2333672
Camposano NA 17 5333 2339005
Gragnano NA 17 29136 2368141
Pago del Vallo di Lauro AV 17 1830 2369971
Visciano NA 18 4454 2374425
Sant'Egidio del Monte Albino SA 18 8909 2383334
Cardito NA 18 22755 2406089
Comiziano NA 18 1814 2407903
Vico Equense NA 18 20969 2428872
Corbara SA 18 2545 2431417
Caivano NA 18 37879 2469296
Lauro AV 18 3509 2472805
Frattamaggiore NA 18 30329 2503134
Pimonte NA 18 5980 2509114
Cicciano NA 18 12906 2522020
Crispano NA 19 12354 2534374
Pagani SA 19 35834 2570208
Tufino NA 19 3776 2573984
Grumo Nevano NA 19 18061 2592045
Taurano AV 19 1546 2593591
Quindici AV 19 1938 2595529
Casandrino NA 19 14336 2609865
Frattaminore NA 20 16208 2626073
Melito di Napoli NA 20 37826 2663899
Roccarainola NA 20 7082 2670981
Meta NA 20 8015 2678996

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)
12 Km NW of Scafati (50787 inhabitants)
14 Km SE of Acerra (59573 inhabitants)
15 Km SE of Casoria (77642 inhabitants)
15 Km SE of Afragola (65057 inhabitants)
15 Km E of Napoli (974074 inhabitants)
15 Km NW of Castellammare di Stabia (66466 inhabitants)
22 Km E of Marano di Napoli (59874 inhabitants)
22 Km SE of Giugliano in Campania (122974 inhabitants)
25 Km SE of Aversa (53047 inhabitants)
27 Km NW of Cava de' Tirreni (53659 inhabitants)
28 Km E of Pozzuoli (81661 inhabitants)
29 Km S of Caserta (76326 inhabitants)
32 Km NW of Salerno (135261 inhabitants)
33 Km W of Avellino (54857 inhabitants)
45 Km SW of Benevento (60091 inhabitants)
53 Km W of Battipaglia (50786 inhabitants)
Recent and historical Seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 1000 Md 1.1 2018-12-11
21:56:05
40.83 14.43 0 2019-06-04
09:16:07
Bollettino Sismico Italiano INGV 64840831
Rev 100 ML 1.6 2018-12-11
21:56:02
40.94 14.43 10 2018-12-11
22:16:15
Sala Sismica INGV-Roma 63846901
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-12-11 21:56:05 ± 0.08
Latitude 40.83 ± 0.00
Longitude 14.43 ± 0.00
Depth (km) 0 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 64840831

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 290
Semi-minor axis of confidence ellipse (meter) 100
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 286
Circular confidence region, given by single value of horizontal uncertainty (meter) 290
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 164
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0.0054
Epicentral distance of station farthest from the epicenter (degree) 0.01979
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

ML:1.6

Field Value
Value 1.6
Uncertainty 0.3
Num. used stations 14
Type of magnitude ML
Reference to an origin 63846901
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-12-11 22:16:15

Md:1.1

Field Value
Value 1.1
Uncertainty 0.9
Num. used stations 3
Type of magnitude Md
Reference to an origin 64840831
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-04-28 16:30:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VTIR.HHZ. 2018-12-11T21:56:06.56 0.3 undecidable manual P 187 0.0198 98 0.22 72
IV.VVDG.HHE. 2018-12-11T21:56:06.46 0.3 undecidable manual S 346 0.0108 104 0.11 73
IV.VBKN.HHZ. 2018-12-11T21:56:05.81 0.6 undecidable manual S 23 0.0054 117 0.02 50
IV.VBKN.HHZ. 2018-12-11T21:56:05.40 0.1 negative manual P 23 0.0054 117 -0.12 98
IV.CRTO.HHZ. 2018-12-11T21:56:05.81 0.6 undecidable manual S 223 0.0054 116 0 50
IV.VVDG.HHE. 2018-12-11T21:56:05.83 0.1 undecidable manual P 346 0.0108 104 0 100
IV.CRTO.HHZ. 2018-12-11T21:56:05.38 0.1 undecidable manual P 223 0.0054 116 -0.15 97
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRTO.HHZ. Md:1 9 END duration s
IV.VBKN.HHZ. Md:1.1 10 END duration s
IV.VVDG.HHE. Md:1.2 11 END duration s
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