Earthquake with magnitude of Md 2.1 on date 27-11-2015 and time 22:17:22 (UTC) in region 4 km SE Massa di Somma (NA)

A magnitude Md 2.1 earthquake occured in region: 4 km SE Massa di Somma (NA), on

  • 27-11-2015 22:17:22 (UTC)
  • 27-11-2015 23:17:22 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.83, 14.42 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
Massa di Somma NA 4 5444 5444
San Sebastiano al Vesuvio NA 5 9196 14640
Sant'Anastasia NA 5 27671 42311
Somma Vesuviana NA 5 35233 77544
Pollena Trocchia NA 5 13562 91106
Ottaviano NA 5 23860 114966
Portici NA 6 55274 170240
Trecase NA 6 9097 179337
Boscotrecase NA 6 10363 189700
Cercola NA 7 18267 207967
Torre del Greco NA 7 86275 294242
Terzigno NA 7 18968 313210
Ercolano NA 7 53709 366919
San Giuseppe Vesuviano NA 7 30657 397576
Boscoreale NA 7 28072 425648
San Giorgio a Cremano NA 7 45557 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
Poggiomarino NA 10 21976 619482
Brusciano NA 11 16466 635948
Pompei NA 11 25358 661306
Mariglianella NA 11 7787 669093
Scisciano NA 11 5994 675087
Marigliano NA 11 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
Carbonara di Nola NA 14 2429 926428
Casoria NA 14 77642 1004070
Nola NA 14 34431 1038501
San Paolo Bel Sito NA 14 3513 1042014
Afragola NA 14 65057 1107071
Napoli NA 15 974074 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
Cimitile NA 15 7280 2154999
Castellammare di Stabia NA 15 66466 2221465
San Valentino Torio SA 16 10947 2232412
Sant'Antonio Abate NA 16 19743 2252155
Marzano di Nola AV 16 1727 2253882
Arzano NA 16 34886 2288768
Casamarciano NA 16 3289 2292057
Sarno SA 17 31529 2323586
Camposano NA 17 5333 2328919
Lettere NA 17 6188 2335107
Cardito NA 17 22755 2357862
Casola di Napoli NA 17 3898 2361760
Pago del Vallo di Lauro AV 17 1830 2363590
Gragnano NA 17 29136 2392726
Visciano NA 18 4454 2397180
Comiziano NA 18 1814 2398994
Caivano NA 18 37879 2436873
Frattamaggiore NA 18 30329 2467202
Sant'Egidio del Monte Albino SA 18 8909 2476111
Vico Equense NA 18 20969 2497080
Crispano NA 18 12354 2509434
Cicciano NA 18 12906 2522340
Corbara SA 18 2545 2524885
Grumo Nevano NA 19 18061 2542946
Pimonte NA 19 5980 2548926
Lauro AV 19 3509 2552435
Tufino NA 19 3776 2556211
Casandrino NA 19 14336 2570547
Taurano AV 19 1546 2572093
Pagani SA 19 35834 2607927
Frattaminore NA 19 16208 2624135
Melito di Napoli NA 19 37826 2661961
Quindici AV 19 1938 2663899
Sant'Antimo NA 20 33905 2697804

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)
12 Km NW of Scafati (50787 inhabitants)
14 Km SE of Acerra (59573 inhabitants)
14 Km SE of Casoria (77642 inhabitants)
14 Km SE of Afragola (65057 inhabitants)
15 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

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours)

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Significant earthquakes since 1000 AD until 2006

Significant earthquakes since 1000 AD until 2006

This map shows the epicenters of the historical earthquakes catalogue CPT11 (Catalogo Parametrico dei Terremoti Italiani, 2011 version) with estimated magnitude ≥ 5.0 since 1000 AD until 2006. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows 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
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 2.1 2015-11-27
22:17:22
40.83 14.42 0 2015-11-27
23:01:22
Sala Operativa INGV-OV (Napoli) 22456301
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2015-11-27 22:17:22 ± 0
Latitude 40.83
Longitude 14.42
Depth (km) 0 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-OV
Event type earthquake
Origin ID 22456301

Uncertainty

Field Value
Preferred uncertainty description
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) 0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree)
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)
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:2.1

Field Value
Value 2.1
Uncertainty 0
Num. used stations
Type of magnitude Md
Reference to an origin 22456301
Agency INGV
Autore Sala Operativa INGV-OV (Napoli)
Time of creation (UTC) 2015-11-27 23:01:22
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol 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
Waveforms Seismic signals in full SEED format Download