Earthquake with magnitude of Md 1.0 on date 09-04-2021 and time 20:56:37 (Italy) in region Vesuvio

A magnitude Md 1.0 earthquake occured in region: Vesuvio, on

  • 09-04-2021 18:56:37 (UTC)
  • 09-04-2021 20:56:37 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.8120, 14.4320 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
Trecase NA 5 9097 9097
Boscotrecase NA 5 10363 19460
Boscoreale NA 6 28072 47532
Terzigno NA 6 18968 66500
Ottaviano NA 6 23860 90360
San Sebastiano al Vesuvio NA 6 9196 99556
Massa di Somma NA 6 5444 105000
Torre del Greco NA 6 86275 191275
Torre Annunziata NA 6 42789 234064
Somma Vesuviana NA 6 35233 269297
Portici NA 7 55274 324571
Sant'Anastasia NA 7 27671 352242
San Giuseppe Vesuviano NA 7 30657 382899
Pollena Trocchia NA 7 13562 396461
Ercolano NA 7 53709 450170
Cercola NA 8 18267 468437
San Giorgio a Cremano NA 8 45557 513994
Pompei NA 9 25358 539352
Poggiomarino NA 9 21976 561328
San Gennaro Vesuviano NA 10 11966 573294
Volla NA 10 23755 597049
Scafati SA 11 50787 647836
Pomigliano d'Arco NA 11 39922 687758
Castello di Cisterna NA 12 7869 695627
Brusciano NA 12 16466 712093
Santa Maria la Carità NA 12 11722 723815
Palma Campania NA 12 15978 739793
Striano NA 12 8397 748190
Scisciano NA 13 5994 754184
Marigliano NA 13 30157 784341
Mariglianella NA 13 7787 792128
Saviano NA 13 15982 808110
San Vitaliano NA 13 6461 814571
Casalnuovo di Napoli NA 13 49855 864426
Castellammare di Stabia NA 14 66466 930892
San Marzano sul Sarno SA 14 10442 941334
Sant'Antonio Abate NA 14 19743 961077
Angri SA 14 34002 995079
Carbonara di Nola NA 14 2429 997508
San Valentino Torio SA 15 10947 1008455
San Paolo Bel Sito NA 15 3513 1011968
Nola NA 15 34431 1046399
Domicella AV 15 1862 1048261
Lettere NA 15 6188 1054449
Liveri NA 15 1607 1056056
Casola di Napoli NA 15 3898 1059954
Gragnano NA 16 29136 1089090
Napoli NA 16 974074 2063164
Casoria NA 16 77642 2140806
Sarno SA 16 31529 2172335
Acerra NA 16 59573 2231908
Afragola NA 16 65057 2296965
Marzano di Nola AV 16 1727 2298692
Vico Equense NA 16 20969 2319661
Cimitile NA 16 7280 2326941
Casavatore NA 16 18661 2345602
Sant'Egidio del Monte Albino SA 17 8909 2354511
Pimonte NA 17 5980 2360491
Corbara SA 17 2545 2363036
Casamarciano NA 17 3289 2366325
Arzano NA 18 34886 2401211
Pago del Vallo di Lauro AV 18 1830 2403041
Pagani SA 18 35834 2438875
Camposano NA 18 5333 2444208
Visciano NA 18 4454 2448662
Lauro AV 19 3509 2452171
Comiziano NA 19 1814 2453985
Meta NA 19 8015 2462000
Cardito NA 19 22755 2484755
Taurano AV 19 1546 2486301
Quindici AV 19 1938 2488239
Nocera Inferiore SA 19 46043 2534282
Cicciano NA 19 12906 2547188
Caivano NA 20 37879 2585067
Frattamaggiore NA 20 30329 2615396
Tufino NA 20 3776 2619172
Piano di Sorrento NA 20 13109 2632281
Crispano NA 20 12354 2644635
Sant'Agnello NA 20 9122 2653757

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km E of Torre del Greco (86275 inhabitants)
7 Km E of Portici (55274 inhabitants)
7 Km E of Ercolano (53709 inhabitants)
11 Km NW of Scafati (50787 inhabitants)
14 Km NW of Castellammare di Stabia (66466 inhabitants)
16 Km E of Napoli (974074 inhabitants)
16 Km SE of Casoria (77642 inhabitants)
16 Km SE of Acerra (59573 inhabitants)
16 Km SE of Afragola (65057 inhabitants)
22 Km E of Marano di Napoli (59874 inhabitants)
23 Km SE of Giugliano in Campania (122974 inhabitants)
26 Km SE of Aversa (53047 inhabitants)
26 Km W of Cava de' Tirreni (53659 inhabitants)
29 Km E of Pozzuoli (81661 inhabitants)
30 Km S of Caserta (76326 inhabitants)
31 Km W of Salerno (135261 inhabitants)
33 Km W of Avellino (54857 inhabitants)
46 Km SW of Benevento (60091 inhabitants)
52 Km W of Battipaglia (50786 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev200
Md 1.0 2021-04-09
18:56:37
40.8125 14.4317 0 2021-04-09
19:02:57
Sala Operativa INGV_OV (Napoli) 88949311
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-09 18:56:37
Latitude 40.8125
Longitude 14.4317
Depth (km) 0 ± 7 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-OV#WinPick
Event type earthquake
Origin ID 88949311

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) 600.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 176
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) 0.17
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:1.0

Field Value
Value 1.0
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 88949311
Agency INGV
Autore Sala Operativa INGV_OV (Napoli)
Time of creation (UTC) 2021-04-09 19:02:57
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols scales with the calculated moment magnitude Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download