Earthquake with magnitude of Md 0.6 on date 21-03-2017 and time 12:20:32 (Italy) in region 5 km SE Massa di Somma (NA)

A magnitude Md 0.6 earthquake occured in region: 5 km SE Massa di Somma (NA), on

  • 21-03-2017 11:20:32 (UTC)
  • 21-03-2017 12:20:32 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.83, 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
Massa di Somma NA 5 5444 5444
San Sebastiano al Vesuvio NA 5 9196 14640
Sant'Anastasia NA 5 27671 42311
Somma Vesuviana NA 5 35233 77544
Pollena Trocchia NA 5 13562 91106
Ottaviano NA 6 23860 114966
Portici NA 6 55274 170240
Trecase NA 6 9097 179337
Boscotrecase NA 6 10363 189700
Torre del Greco NA 6 86275 275975
Cercola NA 7 18267 294242
Ercolano NA 7 53709 347951
Terzigno NA 7 18968 366919
Boscoreale NA 7 28072 394991
San Giuseppe Vesuviano NA 7 30657 425648
San Giorgio a Cremano NA 7 45557 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 10 21976 619482
Brusciano NA 11 16466 635948
Pompei NA 11 25358 661306
Mariglianella NA 12 7787 669093
Marigliano NA 12 30157 699250
Scisciano NA 12 5994 705244
Casalnuovo di Napoli NA 12 49855 755099
San Vitaliano NA 12 6461 761560
Saviano NA 12 15982 777542
Scafati SA 12 50787 828329
Palma Campania NA 12 15978 844307
Striano NA 13 8397 852704
Santa Maria la Carità NA 14 11722 864426
Carbonara di Nola NA 14 2429 866855
Acerra NA 14 59573 926428
Casoria NA 14 77642 1004070
Nola NA 14 34431 1038501
Afragola NA 14 65057 1103558
San Paolo Bel Sito NA 15 3513 1107071
Napoli NA 15 974074 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 15 34002 2214185
Sant'Antonio Abate NA 15 19743 2233928
San Valentino Torio SA 16 10947 2244875
Cimitile NA 16 7280 2252155
Marzano di Nola AV 16 1727 2253882
Arzano NA 16 34886 2288768
Casamarciano NA 16 3289 2292057
Sarno SA 17 31529 2323586
Lettere NA 17 6188 2329774
Casola di Napoli NA 17 3898 2333672
Camposano NA 17 5333 2339005
Gragnano NA 17 29136 2368141
Cardito NA 17 22755 2390896
Pago del Vallo di Lauro AV 17 1830 2392726
Vico Equense NA 18 20969 2413695
Visciano NA 18 4454 2418149
Sant'Egidio del Monte Albino SA 18 8909 2427058
Comiziano NA 18 1814 2428872
Caivano NA 18 37879 2466751
Frattamaggiore NA 18 30329 2497080
Corbara SA 18 2545 2499625
Pimonte NA 18 5980 2505605
Crispano NA 18 12354 2517959
Grumo Nevano NA 19 18061 2536020
Cicciano NA 19 12906 2548926
Lauro AV 19 3509 2552435
Tufino NA 19 3776 2556211
Pagani SA 19 35834 2592045
Casandrino NA 19 14336 2606381
Taurano AV 19 1546 2607927
Melito di Napoli NA 19 37826 2645753
Frattaminore NA 19 16208 2661961
Quindici AV 20 1938 2663899
Sant'Antimo NA 20 33905 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)
7 Km E of Ercolano (53709 inhabitants)
12 Km NW of Scafati (50787 inhabitants)
14 Km SE of Acerra (59573 inhabitants)
14 Km SE of Casoria (77642 inhabitants)
14 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)
28 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)
46 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 0.6 2017-03-21
11:20:32
40.83 14.42 0 2018-01-10
09:55:02
Bollettino Sismico Italiano INGV 48845981
Rev 100 Md 0.7 2017-03-21
11:20:32
40.83 14.42 2 2017-03-21
11:27:01
Sala Sismica INGV-Roma 42735971
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-03-21 11:20:32 ± 0.07
Latitude 40.83 ± 0.00
Longitude 14.42 ± 0.01
Depth (km) 0 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 48845981

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 760
Semi-minor axis of confidence ellipse (meter) 310
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 296
Circular confidence region, given by single value of horizontal uncertainty (meter) 760
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 136
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.17
Epicentral distance of station closest to the epicenter (degree) 0.0036
Epicentral distance of station farthest from the epicenter (degree) 0.01889
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

Md:0.6

Field Value
Value 0.6
Uncertainty 0.8
Num. used stations 5
Type of magnitude Md
Reference to an origin 48845981
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-08-09 11:20:44

Md:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 5
Type of magnitude Md
Reference to an origin 42735971
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-03-21 11:27:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VVDG.HHZ. 2017-03-21T11:20:33.36 0.6 undecidable manual S 4 0.0108 100 0.19 49
IV.VBKN.HHZ. 2017-03-21T11:20:33.25 0.6 undecidable manual S 47 0.0072 104 0.21 49
IV.VTIR.HHZ. 2017-03-21T11:20:33.48 0.6 undecidable manual P 177 0.0189 95 0.3 48
IV.VARP.HHZ. 2017-03-21T11:20:33.46 0.6 undecidable manual S 228 0.0126 98 0.21 49
IV.VBKN.HHZ. 2017-03-21T11:20:32.79 0.1 undecidable manual P 47 0.0072 104 -0.13 100
IV.VARP.HHZ. 2017-03-21T11:20:32.90 0.3 undecidable manual P 228 0.0126 98 -0.14 75
IV.CRTO.HHZ. 2017-03-21T11:20:32.93 0.6 undecidable manual S 185 0.0036 115 0.02 51
IV.VVDG.HHZ. 2017-03-21T11:20:32.85 0.3 undecidable manual P 4 0.0108 100 -0.14 75
IV.CRTO.HHZ. 2017-03-21T11:20:32.67 0.3 undecidable manual P 185 0.0036 115 -0.17 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRTO.HHZ. Md:0.7 6 END duration s
IV.VBKN.HHZ. Md:0.5 5 END duration s
IV.VARP.HHZ. Md:0.7 6 END duration s
IV.VVDG.HHZ. Md:0.7 6 END duration s
IV.VTIR.HHZ. Md:0.6 5 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