ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of Md 0.1 on date 18-03-2019 and time 23:31:11 (Italy) in region 4 km SE Massa di Somma (NA)

A magnitude Md 0.1 earthquake occured in region: 4 km SE Massa di Somma (NA), on

  • 18-03-2019 22:31:11 (UTC)
  • 18-03-2019 23:31:11 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.83, 14.42 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
San Sebastiano al Vesuvio NA 4 9196 14640
Sant'Anastasia NA 5 27671 42311
Pollena Trocchia NA 5 13562 55873
Somma Vesuviana NA 5 35233 91106
Portici NA 6 55274 146380
Ottaviano NA 6 23860 170240
Torre del Greco NA 6 86275 256515
Trecase NA 6 9097 265612
Boscotrecase NA 6 10363 275975
Ercolano NA 6 53709 329684
Cercola NA 7 18267 347951
Terzigno NA 7 18968 366919
San Giorgio a Cremano NA 7 45557 412476
Boscoreale NA 7 28072 440548
San Giuseppe Vesuviano NA 7 30657 471205
Torre Annunziata NA 8 42789 513994
Volla NA 9 23755 537749
Pomigliano d'Arco NA 10 39922 577671
San Gennaro Vesuviano NA 10 11966 589637
Castello di Cisterna NA 10 7869 597506
Poggiomarino NA 11 21976 619482
Brusciano NA 11 16466 635948
Pompei NA 11 25358 661306
Mariglianella NA 12 7787 669093
Casalnuovo di Napoli NA 12 49855 718948
Scisciano NA 12 5994 724942
Marigliano NA 12 30157 755099
San Vitaliano NA 12 6461 761560
Saviano NA 12 15982 777542
Scafati SA 12 50787 828329
Palma Campania NA 13 15978 844307
Striano NA 13 8397 852704
Santa Maria la Carità NA 14 11722 864426
Acerra NA 14 59573 923999
Casoria NA 14 77642 1001641
Afragola NA 14 65057 1066698
Napoli NA 14 974074 2040772
Carbonara di Nola NA 14 2429 2043201
Nola NA 15 34431 2077632
San Paolo Bel Sito NA 15 3513 2081145
Casavatore NA 15 18661 2099806
Liveri NA 15 1607 2101413
San Marzano sul Sarno SA 15 10442 2111855
Castellammare di Stabia NA 15 66466 2178321
Domicella AV 15 1862 2180183
Angri SA 16 34002 2214185
Sant'Antonio Abate NA 16 19743 2233928
Cimitile NA 16 7280 2241208
San Valentino Torio SA 16 10947 2252155
Arzano NA 16 34886 2287041
Marzano di Nola AV 16 1727 2288768
Casamarciano NA 17 3289 2292057
Sarno SA 17 31529 2323586
Lettere NA 17 6188 2329774
Cardito NA 17 22755 2352529
Casola di Napoli NA 17 3898 2356427
Camposano NA 17 5333 2361760
Gragnano NA 17 29136 2390896
Pago del Vallo di Lauro AV 18 1830 2392726
Vico Equense NA 18 20969 2413695
Caivano NA 18 37879 2451574
Frattamaggiore NA 18 30329 2481903
Sant'Egidio del Monte Albino SA 18 8909 2490812
Comiziano NA 18 1814 2492626
Visciano NA 18 4454 2497080
Crispano NA 18 12354 2509434
Corbara SA 18 2545 2511979
Grumo Nevano NA 19 18061 2530040
Pimonte NA 19 5980 2536020
Cicciano NA 19 12906 2548926
Casandrino NA 19 14336 2563262
Lauro AV 19 3509 2566771
Tufino NA 19 3776 2570547
Melito di Napoli NA 19 37826 2608373
Frattaminore NA 19 16208 2624581
Pagani SA 19 35834 2660415
Taurano AV 19 1546 2661961
Sant'Antimo NA 20 33905 2695866
Quindici AV 20 1938 2697804
Meta NA 20 8015 2705819

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km E of Portici (55274 inhabitants)
6 Km NE of Torre del Greco (86275 inhabitants)
6 Km E of Ercolano (53709 inhabitants)
12 Km NW of Scafati (50787 inhabitants)
14 Km S of Acerra (59573 inhabitants)
14 Km SE of Casoria (77642 inhabitants)
14 Km SE of Afragola (65057 inhabitants)
14 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)
24 Km SE of Aversa (53047 inhabitants)
28 Km E of Pozzuoli (81661 inhabitants)
28 Km NW of Cava de' Tirreni (53659 inhabitants)
29 Km S of Caserta (76326 inhabitants)
33 Km NW of Salerno (135261 inhabitants)
33 Km W of Avellino (54857 inhabitants)
46 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
Rev 200 Md 0.1 2019-03-18
22:31:11
40.83 14.42 0 2019-03-18
23:21:06
Sala Operativa INGV-OV (Napoli) 66670431
Rev 100 Md 1.3 2019-03-18
22:31:10
40.84 14.43 5 2019-03-18
22:52:00
Sala Sismica INGV-Roma 66670291
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-03-18 22:31:11
Latitude 40.83
Longitude 14.42
Depth (km) 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-OV
Event type earthquake
Origin ID 66670431

Uncertainty

Field Value
Preferred uncertainty description
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) 0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree)
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)
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
Magnitudes information

Md:1.3

Field Value
Value 1.3
Uncertainty 0.4
Num. used stations 4
Type of magnitude Md
Reference to an origin 66670291
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2019-03-18 22:52:00

Md:0.1

Field Value
Value 0.1
Uncertainty
Num. used stations
Type of magnitude Md
Reference to an origin 66670431
Agency INGV
Autore Sala Operativa INGV-OV (Napoli)
Time of creation (UTC) 2019-03-18 23:21:06
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