Earthquake with magnitude of Md 1.6 on date 10-04-2017 and time 09:06:21 (UTC) 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

  • 10-04-2017 09:06:21 (UTC)
  • 10-04-2017 11:06:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.82, 14.43 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
Massa di Somma NA 5 5444 5444
San Sebastiano al Vesuvio NA 5 9196 14640
Ottaviano NA 5 23860 38500
Somma Vesuviana NA 5 35233 73733
Sant'Anastasia NA 5 27671 101404
Pollena Trocchia NA 6 13562 114966
Boscotrecase NA 6 10363 125329
Trecase NA 6 9097 134426
Portici NA 6 55274 189700
Terzigno NA 6 18968 208668
Torre del Greco NA 7 86275 294943
Boscoreale NA 7 28072 323015
San Giuseppe Vesuviano NA 7 30657 353672
Cercola NA 7 18267 371939
Ercolano NA 7 53709 425648
Torre Annunziata NA 7 42789 468437
San Giorgio a Cremano NA 8 45557 513994
Volla NA 9 23755 537749
San Gennaro Vesuviano NA 10 11966 549715
Pomigliano d'Arco NA 10 39922 589637
Poggiomarino NA 10 21976 611613
Pompei NA 10 25358 636971
Castello di Cisterna NA 11 7869 644840
Brusciano NA 11 16466 661306
Scisciano NA 12 5994 667300
Mariglianella NA 12 7787 675087
Marigliano NA 12 30157 705244
Scafati SA 12 50787 756031
Palma Campania NA 12 15978 772009
Casalnuovo di Napoli NA 12 49855 821864
Saviano NA 12 15982 837846
San Vitaliano NA 12 6461 844307
Striano NA 13 8397 852704
Santa Maria la Carità NA 14 11722 864426
Carbonara di Nola NA 14 2429 866855
San Paolo Bel Sito NA 14 3513 870368
Nola NA 14 34431 904799
Acerra NA 15 59573 964372
San Marzano sul Sarno SA 15 10442 974814
Casoria NA 15 77642 1052456
Afragola NA 15 65057 1117513
Liveri NA 15 1607 1119120
Domicella AV 15 1862 1120982
Angri SA 15 34002 1154984
Napoli NA 15 974074 2129058
Castellammare di Stabia NA 15 66466 2195524
Sant'Antonio Abate NA 15 19743 2215267
San Valentino Torio SA 15 10947 2226214
Casavatore NA 15 18661 2244875
Cimitile NA 16 7280 2252155
Marzano di Nola AV 16 1727 2253882
Sarno SA 16 31529 2285411
Casamarciano NA 16 3289 2288700
Arzano NA 16 34886 2323586
Lettere NA 17 6188 2329774
Casola di Napoli NA 17 3898 2333672
Gragnano NA 17 29136 2362808
Camposano NA 17 5333 2368141
Pago del Vallo di Lauro AV 17 1830 2369971
Sant'Egidio del Monte Albino SA 17 8909 2378880
Visciano NA 18 4454 2383334
Cardito NA 18 22755 2406089
Vico Equense NA 18 20969 2427058
Comiziano NA 18 1814 2428872
Corbara SA 18 2545 2431417
Pimonte NA 18 5980 2437397
Caivano NA 18 37879 2475276
Lauro AV 18 3509 2478785
Frattamaggiore NA 19 30329 2509114
Cicciano NA 19 12906 2522020
Pagani SA 19 35834 2557854
Crispano NA 19 12354 2570208
Tufino NA 19 3776 2573984
Taurano AV 19 1546 2575530
Grumo Nevano NA 19 18061 2593591
Quindici AV 19 1938 2595529
Casandrino NA 19 14336 2609865
Frattaminore NA 20 16208 2626073
Melito di Napoli NA 20 37826 2663899
Meta NA 20 8015 2671914

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)
15 Km SE of Acerra (59573 inhabitants)
15 Km SE of Casoria (77642 inhabitants)
15 Km SE of Afragola (65057 inhabitants)
15 Km E of Napoli (974074 inhabitants)
15 Km NW of Castellammare di Stabia (66466 inhabitants)
22 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)
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
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 1000 Md 1.6 2017-04-10
09:06:21
40.82 14.43 0 2018-01-10
09:56:13
Bollettino Sismico Italiano INGV 50042491
Rev 200 Md 2.5 2017-04-10
09:06:20
40.82 14.43 1 2017-04-10
10:56:02
Sala Operativa INGV-OV (Napoli) 43652771
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2017-04-10 09:06:21 ± 0.04
Latitude 40.82 ± 0.00
Longitude 14.43 ± 0.00
Depth (km) 0 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 50042491

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 260
Semi-minor axis of confidence ellipse (meter) 180
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 268
Circular confidence region, given by single value of horizontal uncertainty (meter) 260
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 130
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
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) 0.0045
Epicentral distance of station farthest from the epicenter (degree) 0.02338
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

Md:1.6

Field Value
Value 1.6
Uncertainty 0.2
Num. used stations 7
Type of magnitude Md
Reference to an origin 50042491
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2017-09-25 08:45:41

Md:2.5

Field Value
Value 2.5
Uncertainty 0
Num. used stations
Type of magnitude Md
Reference to an origin 43652771
Agency INGV
Autore Sala Operativa INGV-OV (Napoli)
Time of creation (UTC) 2017-04-10 10:56:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VBKN.HHZ. 2017-04-10T09:06:21.12 0.1 positive manual P 17 0.0063 105 -0.08 99
IV.OVO.HHZ. 2017-04-10T09:06:21.59 0.3 undecidable manual P 279 0.0234 94 0.01 75
IV.VCRE.HHZ. 2017-04-10T09:06:21.40 0.1 undecidable manual S 147 0.0054 108 0.12 98
IV.VARP.HHZ. 2017-04-10T09:06:21.33 0.1 negative manual P 241 0.0153 97 -0.06 100
IV.VCRE.HHZ. 2017-04-10T09:06:21.11 0.1 undecidable manual P 147 0.0054 108 -0.07 99
IV.VVDG.HHZ. 2017-04-10T09:06:21.70 0.3 undecidable manual S 347 0.0126 98 0.17 73
IV.CRTO.HHZ. 2017-04-10T09:06:21.40 0.3 undecidable manual S 238 0.0045 112 0.16 73
IV.VVDG.HHZ. 2017-04-10T09:06:21.23 0.1 negative manual P 347 0.0126 98 -0.1 99
IV.CRTO.HHZ. 2017-04-10T09:06:21.06 0.1 negative manual P 238 0.0045 112 -0.1 99
IV.VBKN.HHZ. 2017-04-10T09:06:21.40 0.6 undecidable manual S 17 0.0063 105 0.08 50
IV.VTIR.HHZ. 2017-04-10T09:06:21.42 0.1 positive manual P 188 0.018 96 -0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRTO.HHZ. Md:1.4 14 END duration s
IV.VCRE.HHZ. Md:1.5 15 END duration s
IV.VBKN.HHZ. Md:1.4 14 END duration s
IV.VVDG.HHZ. Md:1.5 15 END duration s
IV.VARP.HHZ. Md:1.6 18 END duration s
IV.VTIR.HHZ. Md:1.8 21 END duration s
IV.OVO.HHZ. Md:2 27 END duration s
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