Earthquake with magnitude of Md 1.8 on date 19-04-2017 and time 22:18:01 (Italy) in region 5 km SE San Sebastiano al Vesuvio (NA)

A magnitude Md 1.8 earthquake occured in region: 5 km SE San Sebastiano al Vesuvio (NA), on

  • 19-04-2017 20:18:01 (UTC)
  • 19-04-2017 22:18:01 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.82, 14.42 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
San Sebastiano al Vesuvio NA 5 9196 9196
Massa di Somma NA 5 5444 14640
Trecase NA 5 9097 23737
Torre del Greco NA 6 86275 110012
Boscotrecase NA 6 10363 120375
Portici NA 6 55274 175649
Sant'Anastasia NA 6 27671 203320
Pollena Trocchia NA 6 13562 216882
Ottaviano NA 6 23860 240742
Somma Vesuviana NA 6 35233 275975
Ercolano NA 6 53709 329684
Boscoreale NA 6 28072 357756
Terzigno NA 7 18968 376724
Torre Annunziata NA 7 42789 419513
Cercola NA 7 18267 437780
San Giorgio a Cremano NA 7 45557 483337
San Giuseppe Vesuviano NA 8 30657 513994
Volla NA 10 23755 537749
Pompei NA 10 25358 563107
Poggiomarino NA 10 21976 585083
Pomigliano d'Arco NA 11 39922 625005
San Gennaro Vesuviano NA 11 11966 636971
Castello di Cisterna NA 11 7869 644840
Scafati SA 12 50787 695627
Brusciano NA 12 16466 712093
Mariglianella NA 13 7787 719880
Casalnuovo di Napoli NA 13 49855 769735
Scisciano NA 13 5994 775729
Marigliano NA 13 30157 805886
Palma Campania NA 13 15978 821864
Santa Maria la Carità NA 13 11722 833586
Saviano NA 13 15982 849568
San Vitaliano NA 13 6461 856029
Striano NA 13 8397 864426
Castellammare di Stabia NA 14 66466 930892
Napoli NA 15 974074 1904966
San Marzano sul Sarno SA 15 10442 1915408
Carbonara di Nola NA 15 2429 1917837
Sant'Antonio Abate NA 15 19743 1937580
Angri SA 15 34002 1971582
Casoria NA 15 77642 2049224
Afragola NA 15 65057 2114281
Acerra NA 15 59573 2173854
San Paolo Bel Sito NA 15 3513 2177367
San Valentino Torio SA 15 10947 2188314
Nola NA 15 34431 2222745
Casavatore NA 16 18661 2241406
Liveri NA 16 1607 2243013
Domicella AV 16 1862 2244875
Lettere NA 16 6188 2251063
Gragnano NA 16 29136 2280199
Casola di Napoli NA 16 3898 2284097
Arzano NA 17 34886 2318983
Marzano di Nola AV 17 1727 2320710
Cimitile NA 17 7280 2327990
Sarno SA 17 31529 2359519
Vico Equense NA 17 20969 2380488
Casamarciano NA 17 3289 2383777
Sant'Egidio del Monte Albino SA 17 8909 2392686
Pimonte NA 18 5980 2398666
Corbara SA 18 2545 2401211
Cardito NA 18 22755 2423966
Camposano NA 18 5333 2429299
Pago del Vallo di Lauro AV 18 1830 2431129
Visciano NA 19 4454 2435583
Pagani SA 19 35834 2471417
Caivano NA 19 37879 2509296
Comiziano NA 19 1814 2511110
Frattamaggiore NA 19 30329 2541439
Meta NA 19 8015 2549454
Crispano NA 19 12354 2561808
Lauro AV 19 3509 2565317
Grumo Nevano NA 19 18061 2583378
Casandrino NA 20 14336 2597714
Cicciano NA 20 12906 2610620
Taurano AV 20 1546 2612166
Tufino NA 20 3776 2615942
Melito di Napoli NA 20 37826 2653768
Quindici AV 20 1938 2655706
Sant'Agnello NA 20 9122 2664828
Piano di Sorrento NA 20 13109 2677937

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km NE of Torre del Greco (86275 inhabitants)
6 Km E of Portici (55274 inhabitants)
6 Km E of Ercolano (53709 inhabitants)
12 Km NW of Scafati (50787 inhabitants)
14 Km NW of Castellammare di Stabia (66466 inhabitants)
15 Km E of Napoli (974074 inhabitants)
15 Km SE of Casoria (77642 inhabitants)
15 Km SE of Afragola (65057 inhabitants)
15 Km S of Acerra (59573 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 W of Cava de' Tirreni (53659 inhabitants)
28 Km E of Pozzuoli (81661 inhabitants)
30 Km S of Caserta (76326 inhabitants)
32 Km W of Salerno (135261 inhabitants)
34 Km W of Avellino (54857 inhabitants)
46 Km SW of Benevento (60091 inhabitants)
53 Km W of Battipaglia (50786 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours) *

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985 *

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Significant earthquakes since 1000 AD until 2006

Significant earthquakes since 1000 AD until 2006 *

This map shows the epicenters of the historical earthquakes catalogue CPT11 (Catalogo Parametrico dei Terremoti Italiani, 2011 version) with estimated magnitude ≥ 5.0 since 1000 AD until 2006. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
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 1000 Md 1.8 2017-04-19
20:18:01
40.82 14.42 0 2018-01-10
09:56:15
Bollettino Sismico Italiano INGV 50607461
Rev 200 Md 2.0 2017-04-19
20:18:01
40.82 14.42 0 2017-10-01
14:42:36
Sala Operativa INGV-OV (Napoli) 44109661
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-04-19 20:18:01 ± 0.06
Latitude 40.82 ± 0.00
Longitude 14.42 ± 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 50607461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 330
Semi-minor axis of confidence ellipse (meter) 260
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 295
Circular confidence region, given by single value of horizontal uncertainty (meter) 330
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0.0063
Epicentral distance of station farthest from the epicenter (degree) 0.02158
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

Md:1.8

Field Value
Value 1.8
Uncertainty 0.2
Num. used stations 7
Type of magnitude Md
Reference to an origin 50607461
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-10-01 14:41:41

Md:2

Field Value
Value 2
Uncertainty 0
Num. used stations
Type of magnitude Md
Reference to an origin 44109661
Agency INGV
Autore Sala Operativa INGV-OV (Napoli)
Time of creation (UTC) 2017-04-19 21:16:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.OVO.HHZ. 2017-04-19T20:18:02.30 0.3 undecidable manual P 304 0.0216 95 0.1 73
IV.VVDG.HHZ. 2017-04-19T20:18:02.71 0.3 undecidable manual S 6 0.0207 95 0.22 72
IV.VBKN.HHZ. 2017-04-19T20:18:02.38 0.6 undecidable manual S 25 0.0162 96 0.05 49
IV.VCRE.HHZ. 2017-04-19T20:18:02.20 0.6 undecidable manual S 65 0.009 101 0.15 48
IV.VVDG.HHZ. 2017-04-19T20:18:02.05 0.1 positive manual P 6 0.0207 95 -0.11 98
IV.VCRE.HHZ. 2017-04-19T20:18:01.86 0.1 positive manual P 65 0.009 101 -0.05 99
IV.VTIR.HHZ. 2017-04-19T20:18:01.99 0.1 negative manual P 165 0.0099 100 0.07 99
IV.VARP.HHZ. 2017-04-19T20:18:01.89 0.1 positive manual P 278 0.0081 102 0 100
IV.CRTO.HHZ. 2017-04-19T20:18:01.98 0.3 undecidable manual S 11 0.0063 107 0.03 75
IV.CRTO.HHZ. 2017-04-19T20:18:01.66 0.1 negative manual P 11 0.0063 107 -0.19 96
IV.VBKN.HHZ. 2017-04-19T20:18:01.98 0.1 positive manual P 25 0.0162 96 -0.09 98
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRTO.HHZ. Md:1.4 14 END duration s
IV.VCRE.HHZ. Md:1.6 18 END duration s
IV.VARP.HHZ. Md:1.7 20 END duration s
IV.VBKN.HHZ. Md:1.6 18 END duration s
IV.VTIR.HHZ. Md:1.8 22 END duration s
IV.VVDG.HHZ. Md:2 26 END duration s
IV.OVO.HHZ. Md:2 27 END duration s
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in full SEED format Download