INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of Md 1.5 on date 13-08-2018 and time 03:40:43 (Italy) in region 1 km SW Somma Vesuviana (NA)

A magnitude Md 1.5 earthquake occured in region: 1 km SW Somma Vesuviana (NA), on

  • 13-08-2018 01:40:43 (UTC)
  • 13-08-2018 03:40:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.87, 14.43 at 0 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Somma Vesuviana NA 1 35233 35233
Sant'Anastasia NA 3 27671 62904
Ottaviano NA 4 23860 86764
Pollena Trocchia NA 5 13562 100326
Massa di Somma NA 5 5444 105770
Pomigliano d'Arco NA 6 39922 145692
San Sebastiano al Vesuvio NA 6 9196 154888
Castello di Cisterna NA 6 7869 162757
Cercola NA 6 18267 181024
Brusciano NA 6 16466 197490
Mariglianella NA 7 7787 205277
Marigliano NA 7 30157 235434
San Giuseppe Vesuviano NA 7 30657 266091
Scisciano NA 7 5994 272085
Volla NA 7 23755 295840
San Vitaliano NA 8 6461 302301
Portici NA 8 55274 357575
San Gennaro Vesuviano NA 8 11966 369541
Saviano NA 8 15982 385523
Terzigno NA 8 18968 404491
Casalnuovo di Napoli NA 9 49855 454346
San Giorgio a Cremano NA 9 45557 499903
Ercolano NA 10 53709 553612
Boscotrecase NA 10 10363 563975
Torre del Greco NA 10 86275 650250
Acerra NA 10 59573 709823
Palma Campania NA 11 15978 725801
Nola NA 11 34431 760232
Trecase NA 11 9097 769329
Boscoreale NA 11 28072 797401
San Paolo Bel Sito NA 11 3513 800914
Cimitile NA 12 7280 808194
Poggiomarino NA 12 21976 830170
Torre Annunziata NA 12 42789 872959
Afragola NA 12 65057 938016
Liveri NA 12 1607 939623
Carbonara di Nola NA 12 2429 942052
Casamarciano NA 13 3289 945341
Casoria NA 13 77642 1022983
Camposano NA 13 5333 1028316
Domicella AV 13 1862 1030178
Marzano di Nola AV 13 1727 1031905
Striano NA 14 8397 1040302
Casavatore NA 14 18661 1058963
Comiziano NA 14 1814 1060777
Pompei NA 14 25358 1086135
Cicciano NA 14 12906 1099041
Visciano NA 15 4454 1103495
Cardito NA 15 22755 1126250
Arzano NA 15 34886 1161136
Caivano NA 15 37879 1199015
Pago del Vallo di Lauro AV 15 1830 1200845
Tufino NA 15 3776 1204621
Scafati SA 15 50787 1255408
Napoli NA 16 974074 2229482
Crispano NA 16 12354 2241836
Frattamaggiore NA 16 30329 2272165
Roccarainola NA 16 7082 2279247
San Valentino Torio SA 16 10947 2290194
San Marzano sul Sarno SA 17 10442 2300636
Grumo Nevano NA 17 18061 2318697
Sarno SA 17 31529 2350226
Frattaminore NA 17 16208 2366434
San Felice a Cancello CE 17 17568 2384002
Lauro AV 17 3509 2387511
Casandrino NA 17 14336 2401847
Taurano AV 17 1546 2403393
Sperone AV 17 3706 2407099
Santa Maria la Carità NA 17 11722 2418821
Orta di Atella CE 18 27191 2446012
Angri SA 18 34002 2480014
Avella AV 18 7890 2487904
Melito di Napoli NA 18 37826 2525730
Sant'Antimo NA 18 33905 2559635
Quindici AV 18 1938 2561573
Sant'Arpino CE 18 14307 2575880
Santa Maria a Vico CE 18 14022 2589902
Baiano AV 18 4718 2594620
Sant'Antonio Abate NA 19 19743 2614363
Arienzo CE 19 5365 2619728
Succivo CE 19 8457 2628185
Sirignano AV 19 2933 2631118
Moschiano AV 19 1673 2632791
Castellammare di Stabia NA 19 66466 2699257
Cervino CE 20 5031 2704288
Quadrelle AV 20 1865 2706153
Mugnano di Napoli NA 20 34828 2740981
Mugnano del Cardinale AV 20 5373 2746354
Maddaloni CE 20 39166 2785520

Municipalities with at least 50000 inhabitants

An earthquake occurred to
8 Km NE of Portici (55274 inhabitants)
10 Km NE of Ercolano (53709 inhabitants)
10 Km NE of Torre del Greco (86275 inhabitants)
10 Km SE of Acerra (59573 inhabitants)
12 Km SE of Afragola (65057 inhabitants)
13 Km E of Casoria (77642 inhabitants)
15 Km NW of Scafati (50787 inhabitants)
16 Km E of Napoli (974074 inhabitants)
19 Km N of Castellammare di Stabia (66466 inhabitants)
21 Km E of Marano di Napoli (59874 inhabitants)
21 Km E of Giugliano in Campania (122974 inhabitants)
23 Km SE of Aversa (53047 inhabitants)
25 Km SE of Caserta (76326 inhabitants)
29 Km E of Pozzuoli (81661 inhabitants)
29 Km NW of Cava de' Tirreni (53659 inhabitants)
31 Km W of Avellino (54857 inhabitants)
35 Km NW of Salerno (135261 inhabitants)
42 Km SW of Benevento (60091 inhabitants)
55 Km NW 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
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 01:40:43 ± 0.75
Latitude 40.87 ± 0.03
Longitude 14.43 ± 0.00
Depth (km) 1 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 59698071

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2859
Semi-minor axis of confidence ellipse (meter) 0
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 6
Circular confidence region, given by single value of horizontal uncertainty (meter) 2860
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 351
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.04497
Epicentral distance of station farthest from the epicenter (degree) 0.06025
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

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. 2018-08-13T01:40:46.75 0.6 undecidable manual S 186 0.0603 94 0.53 45
IV.VTIR.HHZ. 2018-08-13T01:40:45.62 0.3 negative manual P 186 0.0603 94 0.38 70
IV.CRTO.HHZ. 2018-08-13T01:40:45.45 0.6 undecidable manual S 190 0.045 95 -0.2 49
IV.VCRE.HHZ. 2018-08-13T01:40:45.41 0.6 undecidable manual S 181 0.0468 95 -0.3 48
IV.CRTO.HHZ. 2018-08-13T01:40:44.73 0.1 negative manual P 190 0.045 95 -0.18 98
IV.VCRE.HHZ. 2018-08-13T01:40:44.86 0.1 positive manual P 181 0.0468 95 -0.09 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRTO.HHZ. Md:1.4 13 END duration s
IV.VCRE.HHZ. Md:1.5 15 END duration s
IV.VTIR.HHZ. Md:1.5 15 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