Earthquake with magnitude of Md 1.1 on date 13-08-2018 and time 01:40:44 (UTC) 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

  • 13-08-2018 01:40:44 (UTC)
  • 13-08-2018 03:40:44 (UTC +02:00) 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
Sant'Anastasia NA 5 27671 77544
Ottaviano NA 5 23860 101404
Pollena Trocchia NA 5 13562 114966
Portici NA 6 55274 170240
Trecase NA 6 9097 179337
Boscotrecase NA 6 10363 189700
Terzigno NA 6 18968 208668
Torre del Greco NA 7 86275 294943
Cercola NA 7 18267 313210
San Giuseppe Vesuviano NA 7 30657 343867
Ercolano NA 7 53709 397576
Boscoreale NA 7 28072 425648
Torre Annunziata NA 8 42789 468437
San Giorgio a Cremano NA 8 45557 513994
Volla NA 9 23755 537749
Pomigliano d'Arco NA 10 39922 577671
San Gennaro Vesuviano NA 10 11966 589637
Poggiomarino NA 10 21976 611613
Castello di Cisterna NA 10 7869 619482
Brusciano NA 11 16466 635948
Pompei NA 11 25358 661306
Mariglianella NA 11 7787 669093
Scisciano NA 11 5994 675087
Marigliano NA 11 30157 705244
Casalnuovo di Napoli NA 12 49855 755099
Saviano NA 12 15982 771081
San Vitaliano NA 12 6461 777542
Palma Campania NA 12 15978 793520
Scafati SA 12 50787 844307
Striano NA 13 8397 852704
Santa Maria la Carità NA 14 11722 864426
Carbonara di Nola NA 14 2429 866855
Nola NA 14 34431 901286
San Paolo Bel Sito NA 14 3513 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
Napoli NA 15 974074 2093194
Domicella AV 15 1862 2095056
Angri SA 15 34002 2129058
San Valentino Torio SA 15 10947 2140005
Casavatore NA 15 18661 2158666
Cimitile NA 15 7280 2165946
Castellammare di Stabia NA 15 66466 2232412
Sant'Antonio Abate NA 15 19743 2252155
Marzano di Nola AV 16 1727 2253882
Casamarciano NA 16 3289 2257171
Arzano NA 16 34886 2292057
Sarno SA 16 31529 2323586
Lettere NA 17 6188 2329774
Camposano NA 17 5333 2335107
Casola di Napoli NA 17 3898 2339005
Pago del Vallo di Lauro AV 17 1830 2340835
Gragnano NA 17 29136 2369971
Cardito NA 17 22755 2392726
Visciano NA 18 4454 2397180
Comiziano NA 18 1814 2398994
Sant'Egidio del Monte Albino SA 18 8909 2407903
Vico Equense NA 18 20969 2428872
Caivano NA 18 37879 2466751
Corbara SA 18 2545 2469296
Frattamaggiore NA 18 30329 2499625
Cicciano NA 18 12906 2512531
Pimonte NA 18 5980 2518511
Lauro AV 18 3509 2522020
Crispano NA 18 12354 2534374
Tufino NA 19 3776 2538150
Grumo Nevano NA 19 18061 2556211
Pagani SA 19 35834 2592045
Taurano AV 19 1546 2593591
Casandrino NA 19 14336 2607927
Quindici AV 19 1938 2609865
Frattaminore NA 20 16208 2626073
Melito di Napoli NA 20 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)
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)
21 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)
33 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 2018-08-13
01:40:44
40.83 14.43 0 2019-04-24
14:51:12
Bollettino Sismico Italiano INGV 66650511
Rev 100 Md 1.5 2018-08-13
01:40:43
40.87 14.43 1 2018-08-13
01:46:54
Sala Sismica INGV-Roma 59698071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-13 01:40:44 ± 0.02
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 66650511

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 800
Semi-minor axis of confidence ellipse (meter) 300
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 265
Circular confidence region, given by single value of horizontal uncertainty (meter) 800
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 162
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.05
Epicentral distance of station closest to the epicenter (degree) 0.0063
Epicentral distance of station farthest from the epicenter (degree) 0.02068
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:1.1

Field Value
Value 1.1
Uncertainty 0.9
Num. used stations 4
Type of magnitude Md
Reference to an origin 66650511
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-03-18 01:52:45

Md:1.5

Field Value
Value 1.5
Uncertainty 0.7
Num. used stations 3
Type of magnitude Md
Reference to an origin 59698071
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-13 01:46:54
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VTIR.HHZ. 2018-08-13T01:40:46.71 0.6 undecidable manual S 184 0.0207 93 0.12 49
IV.VVDG.HHE. 2018-08-13T01:40:45.40 0.6 undecidable manual S 349 0.009 95 0 50
IV.VTIR.HHZ. 2018-08-13T01:40:45.62 0.1 undecidable manual P 184 0.0207 93 0 100
IV.VCRE.HHZ. 2018-08-13T01:40:45.29 0.6 undecidable manual S 151 0.0081 96 0 50
IV.VCRE.HHZ. 2018-08-13T01:40:44.86 0.1 positive manual P 151 0.0081 96 -0.04 100
IV.CRTO.HHZ. 2018-08-13T01:40:44.98 0.6 undecidable manual S 209 0.0063 99 -0.05 50
IV.VVDG.HHE. 2018-08-13T01:40:44.97 0.1 undecidable manual P 349 0.009 95 0.02 100
IV.CRTO.HHZ. 2018-08-13T01:40:44.73 0.1 negative manual P 209 0.0063 99 -0.02 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRTO.HHZ. Md:0.9 8 END duration s
IV.VCRE.HHZ. Md:1.1 10 END duration s
IV.VTIR.HHZ. Md:1.1 9 END duration s
IV.VVDG.HHE. Md:1.1 10 END duration s
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download