Earthquake with magnitude of Md 0.7 on date 21-03-2017 and time 11:37:44 (Italy) in region 4 km SE Massa di Somma (NA)

A magnitude Md 0.7 earthquake occured in region: 4 km SE Massa di Somma (NA), on

  • 21-03-2017 10:37:44 (UTC)
  • 21-03-2017 11:37:44 (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 4 5444 5444
San Sebastiano al Vesuvio NA 5 9196 14640
Sant'Anastasia NA 5 27671 42311
Pollena Trocchia NA 5 13562 55873
Somma Vesuviana NA 5 35233 91106
Ottaviano NA 6 23860 114966
Portici NA 6 55274 170240
Torre del Greco NA 6 86275 256515
Trecase NA 6 9097 265612
Boscotrecase NA 6 10363 275975
Cercola NA 7 18267 294242
Ercolano NA 7 53709 347951
Terzigno NA 7 18968 366919
Boscoreale NA 7 28072 394991
San Giorgio a Cremano NA 7 45557 440548
San Giuseppe Vesuviano NA 7 30657 471205
Torre Annunziata NA 8 42789 513994
Volla NA 9 23755 537749
Pomigliano d'Arco NA 9 39922 577671
San Gennaro Vesuviano NA 10 11966 589637
Castello di Cisterna NA 10 7869 597506
Brusciano NA 11 16466 613972
Poggiomarino NA 11 21976 635948
Pompei NA 11 25358 661306
Mariglianella NA 11 7787 669093
Scisciano NA 12 5994 675087
Marigliano NA 12 30157 705244
Casalnuovo di Napoli NA 12 49855 755099
San Vitaliano NA 12 6461 761560
Saviano NA 12 15982 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
Acerra NA 14 59573 923999
Casoria NA 14 77642 1001641
Carbonara di Nola NA 14 2429 1004070
Afragola NA 14 65057 1069127
Nola NA 14 34431 1103558
Napoli NA 14 974074 2077632
San Paolo Bel Sito NA 15 3513 2081145
Casavatore NA 15 18661 2099806
Liveri NA 15 1607 2101413
Domicella AV 15 1862 2103275
San Marzano sul Sarno SA 15 10442 2113717
Angri SA 15 34002 2147719
Castellammare di Stabia NA 15 66466 2214185
Cimitile NA 16 7280 2221465
Sant'Antonio Abate NA 16 19743 2241208
San Valentino Torio SA 16 10947 2252155
Arzano NA 16 34886 2287041
Marzano di Nola AV 16 1727 2288768
Casamarciano NA 16 3289 2292057
Sarno SA 17 31529 2323586
Lettere NA 17 6188 2329774
Camposano NA 17 5333 2335107
Cardito NA 17 22755 2357862
Casola di Napoli NA 17 3898 2361760
Gragnano NA 17 29136 2390896
Pago del Vallo di Lauro AV 18 1830 2392726
Caivano NA 18 37879 2430605
Comiziano NA 18 1814 2432419
Visciano NA 18 4454 2436873
Vico Equense NA 18 20969 2457842
Frattamaggiore NA 18 30329 2488171
Sant'Egidio del Monte Albino SA 18 8909 2497080
Crispano NA 18 12354 2509434
Corbara SA 18 2545 2511979
Grumo Nevano NA 18 18061 2530040
Cicciano NA 19 12906 2542946
Pimonte NA 19 5980 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

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 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 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 0.7 2017-03-21
10:37:44
40.83 14.42 0 2018-01-10
09:55:02
Bollettino Sismico Italiano INGV 48845531
Rev 100 Md 0.9 2017-03-21
10:37:43
40.83 14.44 4 2017-03-21
10:52:59
Sala Sismica INGV-Roma 42734421
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-03-21 10:37:44 ± 0.09
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 48845531

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 810
Semi-minor axis of confidence ellipse (meter) 360
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 297
Circular confidence region, given by single value of horizontal uncertainty (meter) 810
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 150
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) 0.21
Epicentral distance of station closest to the epicenter (degree) 0.0054
Epicentral distance of station farthest from the epicenter (degree) 0.02068
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:0.7

Field Value
Value 0.7
Uncertainty 0.2
Num. used stations 5
Type of magnitude Md
Reference to an origin 48845531
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-08-09 11:07:19

Md:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 4
Type of magnitude Md
Reference to an origin 42734421
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-03-21 10:52:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VBKN.HHZ. 2017-03-21T10:37:44.22 0.1 undecidable manual P 60 0.0072 104 -0.21 97
IV.VVDG.HHZ. 2017-03-21T10:37:44.94 0.6 undecidable manual S 11 0.0099 101 0.31 47
IV.VARP.HHZ. 2017-03-21T10:37:44.40 0.1 undecidable manual P 221 0.0126 98 -0.15 98
IV.CRTO.HHZ. 2017-03-21T10:37:44.73 0.6 undecidable manual S 172 0.0054 109 0.26 48
IV.VVDG.HHZ. 2017-03-21T10:37:44.42 0.1 undecidable manual P 11 0.0099 101 -0.05 100
IV.VBKN.HHZ. 2017-03-21T10:37:44.73 0.6 undecidable manual S 60 0.0072 104 0.18 49
IV.CRTO.HHZ. 2017-03-21T10:37:44.12 0.1 undecidable manual P 172 0.0054 109 -0.26 96
IV.VTIR.HHZ. 2017-03-21T10:37:44.91 0.1 undecidable manual P 174 0.0207 95 0.19 97
IV.VARP.HHZ. 2017-03-21T10:37:44.89 0.3 undecidable manual S 221 0.0126 98 0.13 74
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRTO.HHZ. Md:0.5 5 END duration s
IV.VBKN.HHZ. Md:0.7 6 END duration s
IV.VARP.HHZ. Md:1 8 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