Earthquake with magnitude of Md 1.1 on date 22-05-2017 and time 01:54:40 (Italy) in region 2 km W Trecase (NA)

A magnitude Md 1.1 earthquake occured in region: 2 km W Trecase (NA), on

  • 21-05-2017 23:54:40 (UTC)
  • 22-05-2017 01:54:40 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.78, 14.41 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
Trecase NA 2 9097 9097
Torre Annunziata NA 4 42789 51886
Torre del Greco NA 4 86275 138161
Boscotrecase NA 4 10363 148524
Boscoreale NA 6 28072 176596
Ercolano NA 7 53709 230305
Portici NA 7 55274 285579
San Sebastiano al Vesuvio NA 8 9196 294775
Terzigno NA 8 18968 313743
Pompei NA 8 25358 339101
Massa di Somma NA 8 5444 344545
San Giorgio a Cremano NA 9 45557 390102
Pollena Trocchia NA 9 13562 403664
Ottaviano NA 10 23860 427524
Sant'Anastasia NA 10 27671 455195
Cercola NA 10 18267 473462
San Giuseppe Vesuviano NA 10 30657 504119
Scafati SA 10 50787 554906
Somma Vesuviana NA 10 35233 590139
Santa Maria la Carità NA 11 11722 601861
Castellammare di Stabia NA 11 66466 668327
Poggiomarino NA 11 21976 690303
Volla NA 13 23755 714058
Vico Equense NA 13 20969 735027
Sant'Antonio Abate NA 13 19743 754770
Gragnano NA 14 29136 783906
Casola di Napoli NA 14 3898 787804
San Gennaro Vesuviano NA 14 11966 799770
Angri SA 14 34002 833772
Lettere NA 14 6188 839960
Pimonte NA 14 5980 845940
Pomigliano d'Arco NA 15 39922 885862
Striano NA 15 8397 894259
Meta NA 15 8015 902274
San Marzano sul Sarno SA 15 10442 912716
Napoli NA 15 974074 1886790
Castello di Cisterna NA 16 7869 1894659
Palma Campania NA 16 15978 1910637
Sant'Agnello NA 16 9122 1919759
Piano di Sorrento NA 16 13109 1932868
Brusciano NA 16 16466 1949334
Casalnuovo di Napoli NA 16 49855 1999189
San Valentino Torio SA 16 10947 2010136
Corbara SA 17 2545 2012681
Sant'Egidio del Monte Albino SA 17 8909 2021590
Scisciano NA 17 5994 2027584
Mariglianella NA 17 7787 2035371
Sorrento NA 17 16679 2052050
Marigliano NA 17 30157 2082207
Saviano NA 17 15982 2098189
San Vitaliano NA 17 6461 2104650
Casoria NA 18 77642 2182292
Positano SA 18 3955 2186247
Carbonara di Nola NA 18 2429 2188676
Casavatore NA 18 18661 2207337
Sarno SA 18 31529 2238866
Pagani SA 18 35834 2274700
Afragola NA 18 65057 2339757
Domicella AV 19 1862 2341619
San Paolo Bel Sito NA 19 3513 2345132
Acerra NA 19 59573 2404705
Arzano NA 19 34886 2439591
Agerola NA 19 7673 2447264
Liveri NA 19 1607 2448871
Nola NA 19 34431 2483302
Massa Lubrense NA 19 14243 2497545
Nocera Inferiore SA 20 46043 2543588
Marzano di Nola AV 20 1727 2545315

Municipalities with at least 50000 inhabitants

An earthquake occurred to
4 Km E of Torre del Greco (86275 inhabitants)
7 Km SE of Ercolano (53709 inhabitants)
7 Km SE of Portici (55274 inhabitants)
10 Km W of Scafati (50787 inhabitants)
11 Km NW of Castellammare di Stabia (66466 inhabitants)
15 Km E of Napoli (974074 inhabitants)
18 Km SE of Casoria (77642 inhabitants)
18 Km SE of Afragola (65057 inhabitants)
19 Km S of Acerra (59573 inhabitants)
23 Km SE of Marano di Napoli (59874 inhabitants)
24 Km SE of Giugliano in Campania (122974 inhabitants)
26 Km W of Cava de' Tirreni (53659 inhabitants)
28 Km SE of Aversa (53047 inhabitants)
28 Km E of Pozzuoli (81661 inhabitants)
31 Km W of Salerno (135261 inhabitants)
34 Km S of Caserta (76326 inhabitants)
36 Km W of Avellino (54857 inhabitants)
50 Km SW of Benevento (60091 inhabitants)
52 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 1.1 2017-05-21
23:54:40
40.78 14.41 0 2018-07-06
10:38:22
Bollettino Sismico Italiano INGV 52550971
Rev 100 Md 1.3 2017-05-21
23:54:40
40.77 14.43 0 2017-05-22
00:09:04
Sala Sismica INGV-Roma 45627891
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-05-21 23:54:40 ± 0.24
Latitude 40.78 ± 0.01
Longitude 14.41 ± 0.03
Depth (km) 0 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 52550971

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2230
Semi-minor axis of confidence ellipse (meter) 970
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 273
Circular confidence region, given by single value of horizontal uncertainty (meter) 2230
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 327
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.02878
Epicentral distance of station farthest from the epicenter (degree) 0.05846
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

Md:1.1

Field Value
Value 1.1
Uncertainty 0.1
Num. used stations 6
Type of magnitude Md
Reference to an origin 52550971
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-12-12 11:01:42

Md:1.3

Field Value
Value 1.3
Uncertainty 0.3
Num. used stations 4
Type of magnitude Md
Reference to an origin 45627891
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2017-05-22 00:09:04
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VVDG.HHZ. 2017-05-21T23:54:42.05 0.6 undecidable manual P 9 0.0585 92 0 52
IV.CRTO.HHZ. 2017-05-21T23:54:42.46 0.3 undecidable manual S 11 0.0441 92 0.02 78
IV.VBKN.HHZ. 2017-05-21T23:54:42.00 0.3 undecidable manual P 15 0.054 92 0.05 77
IV.CRTO.HHZ. 2017-05-21T23:54:41.57 0.3 undecidable manual P 11 0.0441 92 -0.16 76
IV.VCRE.HHZ. 2017-05-21T23:54:41.92 0.3 undecidable manual P 20 0.0432 92 0.2 75
IV.VTIR.HHZ. 2017-05-21T23:54:41.77 0.3 undecidable manual S 19 0.0288 94 -0.11 77
IV.OVO.HHZ. 2017-05-21T23:54:41.95 0.3 undecidable manual P 347 0.0504 92 0.07 78
IV.VTIR.HHZ. 2017-05-21T23:54:41.17 0.1 undecidable manual P 19 0.0288 94 -0.24 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VTIR.HHZ. Md:1.1 9 END duration s
IV.CRTO.HHZ. Md:1 8 END duration s
IV.VVDG.HHZ. Md:1.2 10 END duration s
IV.VBKN.HHZ. Md:1.2 10 END duration s
IV.OVO.HHZ. Md:0.9 7 END duration s
IV.VCRE.HHZ. Md:1.2 10 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