Earthquake with magnitude of Md 1.0 on date 23-05-2020 and time 13:00:21 (UTC) in region 4 km SW Somma Vesuviana (NA)

A magnitude Md 1.0 earthquake occured in region: 4 km SW Somma Vesuviana (NA), on

  • 23-05-2020 13:00:21 (UTC)
  • 23-05-2020 15:00:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.83, 14.43 at 0 km depth.

The earthquake was located by: Sala Operativa INGV_OV (Napoli).

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
Somma Vesuviana NA 4 35233 35233
Massa di Somma NA 4 5444 40677
Sant'Anastasia NA 4 27671 68348
San Sebastiano al Vesuvio NA 5 9196 77544
Pollena Trocchia NA 5 13562 91106
Ottaviano NA 5 23860 114966
Portici NA 6 55274 170240
Cercola NA 6 18267 188507
Terzigno NA 7 18968 207475
San Giuseppe Vesuviano NA 7 30657 238132
Boscotrecase NA 7 10363 248495
Trecase NA 7 9097 257592
Ercolano NA 7 53709 311301
Torre del Greco NA 7 86275 397576
San Giorgio a Cremano NA 8 45557 443133
Boscoreale NA 8 28072 471205
Torre Annunziata NA 8 42789 513994
Volla NA 8 23755 537749
Pomigliano d'Arco NA 9 39922 577671
San Gennaro Vesuviano NA 9 11966 589637
Castello di Cisterna NA 10 7869 597506
Brusciano NA 10 16466 613972
Poggiomarino NA 11 21976 635948
Mariglianella NA 11 7787 643735
Scisciano NA 11 5994 649729
Marigliano NA 11 30157 679886
Casalnuovo di Napoli NA 11 49855 729741
San Vitaliano NA 11 6461 736202
Saviano NA 11 15982 752184
Pompei NA 11 25358 777542
Palma Campania NA 12 15978 793520
Scafati SA 13 50787 844307
Striano NA 13 8397 852704
Acerra NA 13 59573 912277
Carbonara di Nola NA 14 2429 914706
Nola NA 14 34431 949137
San Paolo Bel Sito NA 14 3513 952650
Afragola NA 14 65057 1017707
Casoria NA 14 77642 1095349
Liveri NA 14 1607 1096956
Santa Maria la Carità NA 14 11722 1108678
Napoli NA 15 974074 2082752
Domicella AV 15 1862 2084614
Casavatore NA 15 18661 2103275
Cimitile NA 15 7280 2110555
San Marzano sul Sarno SA 15 10442 2120997
Marzano di Nola AV 15 1727 2122724
San Valentino Torio SA 16 10947 2133671
Angri SA 16 34002 2167673
Casamarciano NA 16 3289 2170962
Arzano NA 16 34886 2205848
Castellammare di Stabia NA 16 66466 2272314
Sant'Antonio Abate NA 16 19743 2292057
Camposano NA 16 5333 2297390
Sarno SA 17 31529 2328919
Cardito NA 17 22755 2351674
Pago del Vallo di Lauro AV 17 1830 2353504
Comiziano NA 17 1814 2355318
Visciano NA 17 4454 2359772
Caivano NA 17 37879 2397651
Lettere NA 17 6188 2403839
Casola di Napoli NA 18 3898 2407737
Frattamaggiore NA 18 30329 2438066
Cicciano NA 18 12906 2450972
Crispano NA 18 12354 2463326
Gragnano NA 18 29136 2492462
Tufino NA 18 3776 2496238
Grumo Nevano NA 18 18061 2514299
Sant'Egidio del Monte Albino SA 18 8909 2523208
Lauro AV 18 3509 2526717
Corbara SA 19 2545 2529262
Vico Equense NA 19 20969 2550231
Casandrino NA 19 14336 2564567
Taurano AV 19 1546 2566113
Frattaminore NA 19 16208 2582321
Melito di Napoli NA 19 37826 2620147
Pimonte NA 19 5980 2626127
Quindici AV 19 1938 2628065
Pagani SA 19 35834 2663899
Sant'Antimo NA 19 33905 2697804
Roccarainola NA 19 7082 2704886
Orta di Atella CE 20 27191 2732077

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km E of Portici (55274 inhabitants)
7 Km NE of Torre del Greco (86275 inhabitants)
7 Km E of Ercolano (53709 inhabitants)
13 Km NW of Scafati (50787 inhabitants)
13 Km SE of Acerra (59573 inhabitants)
14 Km SE of Afragola (65057 inhabitants)
14 Km SE of Casoria (77642 inhabitants)
15 Km E of Napoli (974074 inhabitants)
16 Km N 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)
28 Km S of Caserta (76326 inhabitants)
33 Km W of Avellino (54857 inhabitants)
33 Km NW of Salerno (135261 inhabitants)
45 Km SW of Benevento (60091 inhabitants)
53 Km W of Battipaglia (50786 inhabitants)
Recent and historical Seismicity
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 200 Md 1.0 2020-05-23
13:00:21
40.83 14.43 0 2020-05-23
14:41:06
Sala Operativa INGV_OV (Napoli) 79482631
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-05-23 13:00:21
Latitude 40.83
Longitude 14.43
Depth (km) 0 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-OV#WinPick
Event type earthquake
Origin ID 79482631

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
Semi-major axis of confidence ellipse (meter)
Semi-minor axis of confidence ellipse (meter)
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi)
Circular confidence region, given by single value of horizontal uncertainty (meter) 400
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 160
Number of associated phases, regardless of their use for origin computation 1
Number of defining phases 1
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.08
Epicentral distance of station closest to the epicenter (degree)
Epicentral distance of station farthest from the epicenter (degree)
Number of stations at which the event was observed 0
Number of stations from which data was used for origin computation 0
Magnitude information

Md:1

Field Value
Value 1
Uncertainty 0.1
Num. used stations
Type of magnitude Md
Reference to an origin 79482631
Agency INGV
Autore Sala Operativa INGV_OV (Napoli)
Time of creation (UTC) 2020-05-23 14:41:06
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