Earthquake with magnitude of Md 1.6 on date 14-08-2020 and time 01:23:12 (Italy) in region 5 km SE Massa di Somma (NA)

A magnitude Md 1.6 earthquake occured in region: 5 km SE Massa di Somma (NA), on

  • 13-08-2020 23:23:12 (UTC)
  • 14-08-2020 01:23:12 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.82, 14.42 at 1 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
Somma Vesuviana NA 6 35233 49873
Sant'Anastasia NA 6 27671 77544
Trecase NA 6 9097 86641
Ottaviano NA 6 23860 110501
Pollena Trocchia NA 6 13562 124063
Boscotrecase NA 6 10363 134426
Portici NA 6 55274 189700
Torre del Greco NA 6 86275 275975
Terzigno NA 7 18968 294943
Boscoreale NA 7 28072 323015
Ercolano NA 7 53709 376724
Cercola NA 7 18267 394991
Torre Annunziata NA 7 42789 437780
San Giuseppe Vesuviano NA 7 30657 468437
San Giorgio a Cremano NA 8 45557 513994
Volla NA 9 23755 537749
Pomigliano d'Arco NA 10 39922 577671
San Gennaro Vesuviano NA 10 11966 589637
Poggiomarino NA 10 21976 611613
Pompei NA 10 25358 636971
Castello di Cisterna NA 11 7869 644840
Brusciano NA 11 16466 661306
Scafati SA 12 50787 712093
Scisciano NA 12 5994 718087
Mariglianella NA 12 7787 725874
Marigliano NA 12 30157 756031
Casalnuovo di Napoli NA 12 49855 805886
Palma Campania NA 13 15978 821864
San Vitaliano NA 13 6461 828325
Saviano NA 13 15982 844307
Striano NA 13 8397 852704
Santa Maria la Carità NA 13 11722 864426
Carbonara di Nola NA 14 2429 866855
Napoli NA 15 974074 1840929
Casoria NA 15 77642 1918571
Acerra NA 15 59573 1978144
Castellammare di Stabia NA 15 66466 2044610
San Paolo Bel Sito NA 15 3513 2048123
Nola NA 15 34431 2082554
San Marzano sul Sarno SA 15 10442 2092996
Angri SA 15 34002 2126998
Afragola NA 15 65057 2192055
Sant'Antonio Abate NA 15 19743 2211798
Liveri NA 15 1607 2213405
Domicella AV 15 1862 2215267
Casavatore NA 15 18661 2233928
San Valentino Torio SA 15 10947 2244875
Cimitile NA 16 7280 2252155
Marzano di Nola AV 16 1727 2253882
Arzano NA 16 34886 2288768
Lettere NA 16 6188 2294956
Casola di Napoli NA 17 3898 2298854
Sarno SA 17 31529 2330383
Gragnano NA 17 29136 2359519
Casamarciano NA 17 3289 2362808
Vico Equense NA 17 20969 2383777
Sant'Egidio del Monte Albino SA 18 8909 2392686
Camposano NA 18 5333 2398019
Pago del Vallo di Lauro AV 18 1830 2399849
Cardito NA 18 22755 2422604
Corbara SA 18 2545 2425149
Pimonte NA 18 5980 2431129
Visciano NA 18 4454 2435583
Comiziano NA 18 1814 2437397
Caivano NA 18 37879 2475276
Frattamaggiore NA 19 30329 2505605
Pagani SA 19 35834 2541439
Lauro AV 19 3509 2544948
Crispano NA 19 12354 2557302
Cicciano NA 19 12906 2570208
Grumo Nevano NA 19 18061 2588269
Tufino NA 19 3776 2592045
Casandrino NA 19 14336 2606381
Taurano AV 19 1546 2607927
Meta NA 20 8015 2615942
Quindici AV 20 1938 2617880
Melito di Napoli NA 20 37826 2655706
Frattaminore NA 20 16208 2671914

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)
15 Km E of Napoli (974074 inhabitants)
15 Km S of Acerra (59573 inhabitants)
15 Km NW of Castellammare di Stabia (66466 inhabitants)
15 Km SE of Casoria (77642 inhabitants)
15 Km SE of Afragola (65057 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)
27 Km NW of Cava de' Tirreni (53659 inhabitants)
28 Km E of Pozzuoli (81661 inhabitants)
29 Km S of Caserta (76326 inhabitants)
32 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
Bulletin
Rev1000
Md 1.6 2020-08-13
23:23:12
40.82 14.42 1 2020-11-19
12:37:05
Bollettino Sismico Italiano INGV 84063311
Reviewed
Rev200
Md 1.5 2020-08-13
23:23:12
40.82 14.43 0 2020-10-30
11:37:22
Sala Operativa INGV_OV (Napoli) 81954831
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-08-13 23:23:12 ± 0.11
Latitude 40.82 ± 0.00
Longitude 14.42 ± 0.00
Depth (km) 1 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 84063311

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 161
Semi-minor axis of confidence ellipse (meter) 116
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 92
Circular confidence region, given by single value of horizontal uncertainty (meter) 160
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 137
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.11
Epicentral distance of station closest to the epicenter (degree) 0.0009
Epicentral distance of station farthest from the epicenter (degree) 0.01529
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:1.5

Field Value
Value 1.5
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 81954831
Agency INGV
Autore Sala Operativa INGV_OV (Napoli)
Time of creation (UTC) 2020-08-13 23:38:46

Md:1.6

Field Value
Value 1.6
Uncertainty 0.6
Num. used stations 5
Type of magnitude Md
Reference to an origin 84063311
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2020-10-30 11:37:05
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VVDG.HHE. 2020-08-13T23:23:13.21 0.1 undecidable manual P 1 0.0153 119 -0.05 100
IV.VTIR.HHN. 2020-08-13T23:23:13.17 0.3 undecidable manual P 178 0.0144 121 -0.05 75
IV.VBKN.HHN. 2020-08-13T23:23:13.65 0.3 undecidable manual S 27 0.0108 129 -0.04 75
IV.VTIR.HHN. 2020-08-13T23:23:13.90 0.3 undecidable manual S 178 0.0144 121 -0.11 74
IV.VCRE.HHZ. 2020-08-13T23:23:13.30 0.1 undecidable manual S 102 0.0063 144 -0.05 100
IV.VVDG.HHE. 2020-08-13T23:23:13.94 0.3 undecidable manual S 1 0.0153 119 -0.15 73
IV.CRTO.HHE. 2020-08-13T23:23:13.19 0.3 undecidable manual S 315 0.0009 172 0.05 75
IV.VBKN.HHN. 2020-08-13T23:23:13.17 0.1 positive manual P 27 0.0108 129 0.13 98
IV.VCRE.HHZ. 2020-08-13T23:23:12.95 0.1 negative manual P 102 0.0063 144 0.1 99
IV.CRTO.HHE. 2020-08-13T23:23:12.86 0.1 negative manual P 315 0.0009 172 0.12 99
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRTO.HHE. Md:1.6 17 END duration s
IV.VCRE.HHZ. Md:1.6 18 END duration s
IV.VBKN.HHN. Md:1.5 16 END duration s
IV.VTIR.HHN. Md:1.7 19 END duration s
IV.VVDG.HHE. Md:1.6 18 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