Earthquake with magnitude of Md 1.7 on date 16-08-2019 and time 22:15:43 (Italy) in region 5 km SE Massa di Somma (NA)

A magnitude Md 1.7 earthquake occured in region: 5 km SE Massa di Somma (NA), on

  • 16-08-2019 20:15:43 (UTC)
  • 16-08-2019 22:15:43 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.82, 14.43 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
Ottaviano NA 5 23860 38500
Somma Vesuviana NA 6 35233 73733
Sant'Anastasia NA 6 27671 101404
Boscotrecase NA 6 10363 111767
Trecase NA 6 9097 120864
Pollena Trocchia NA 6 13562 134426
Portici NA 6 55274 189700
Terzigno NA 6 18968 208668
Torre del Greco NA 6 86275 294943
Boscoreale NA 7 28072 323015
Ercolano NA 7 53709 376724
San Giuseppe Vesuviano NA 7 30657 407381
Torre Annunziata NA 7 42789 450170
Cercola NA 7 18267 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
Scafati SA 12 50787 712093
Scisciano NA 12 5994 718087
Mariglianella NA 12 7787 725874
Marigliano NA 12 30157 756031
Palma Campania NA 12 15978 772009
Saviano NA 12 15982 787991
Casalnuovo di Napoli NA 12 49855 837846
San Vitaliano NA 12 6461 844307
Striano NA 13 8397 852704
Santa Maria la Carità NA 13 11722 864426
Carbonara di Nola NA 14 2429 866855
Nola NA 15 34431 901286
San Paolo Bel Sito NA 15 3513 904799
San Marzano sul Sarno SA 15 10442 915241
Angri SA 15 34002 949243
Acerra NA 15 59573 1008816
Castellammare di Stabia NA 15 66466 1075282
Casoria NA 15 77642 1152924
Sant'Antonio Abate NA 15 19743 1172667
Napoli NA 15 974074 2146741
Liveri NA 15 1607 2148348
Domicella AV 15 1862 2150210
Afragola NA 15 65057 2215267
San Valentino Torio SA 15 10947 2226214
Casavatore NA 16 18661 2244875
Cimitile NA 16 7280 2252155
Marzano di Nola AV 16 1727 2253882
Lettere NA 16 6188 2260070
Sarno SA 16 31529 2291599
Casamarciano NA 17 3289 2294888
Casola di Napoli NA 17 3898 2298786
Gragnano NA 17 29136 2327922
Arzano NA 17 34886 2362808
Camposano NA 17 5333 2368141
Vico Equense NA 17 20969 2389110
Sant'Egidio del Monte Albino SA 17 8909 2398019
Pago del Vallo di Lauro AV 17 1830 2399849
Corbara SA 18 2545 2402394
Cardito NA 18 22755 2425149
Visciano NA 18 4454 2429603
Pimonte NA 18 5980 2435583
Comiziano NA 18 1814 2437397
Pagani SA 19 35834 2473231
Lauro AV 19 3509 2476740
Caivano NA 19 37879 2514619
Frattamaggiore NA 19 30329 2544948
Cicciano NA 19 12906 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 20 14336 2609865
Meta NA 20 8015 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 SE of Acerra (59573 inhabitants)
15 Km NW of Castellammare di Stabia (66466 inhabitants)
15 Km SE of Casoria (77642 inhabitants)
15 Km E of Napoli (974074 inhabitants)
15 Km SE of Afragola (65057 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)
46 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.
Earthquakes since 1000 AD until 2014

Earthquakes since 1000 AD until 2014 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. 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 1.7 2019-08-16
20:15:43
40.82 14.43 1 2019-11-13
14:31:06
Bollettino Sismico Italiano INGV 73279411
Rev 200 Md 2.1 2019-08-16
20:15:43
40.82 14.43 0 2019-10-15
23:26:52
Sala Operativa INGV-OV (Napoli) 71556071
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2019-08-16 20:15:43 ± 0.11
Latitude 40.82 ± 0.00
Longitude 14.43 ± 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 73279411

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 143
Semi-minor axis of confidence ellipse (meter) 131
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 95
Circular confidence region, given by single value of horizontal uncertainty (meter) 140
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 76
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.15
Epicentral distance of station closest to the epicenter (degree) 0.0036
Epicentral distance of station farthest from the epicenter (degree) 0.06925
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

Md:1.7

Field Value
Value 1.7
Uncertainty 0.2
Num. used stations 7
Type of magnitude Md
Reference to an origin 73279411
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-10-15 23:27:53

Md:2.1

Field Value
Value 2.1
Uncertainty 0.1
Num. used stations
Type of magnitude Md
Reference to an origin 71556071
Agency INGV
Autore Sala Operativa INGV_OV (Napoli)
Time of creation (UTC) 2019-08-16 20:50:18
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VEPO.HHZ. 2019-08-16T20:15:47.91 0.6 undecidable manual P 258 0.0692 97 -0.26 47
IV.VPOB.HHZ. 2019-08-16T20:15:46.52 0.3 undecidable manual P 313 0.045 100 -0.19 72
IV.OVO.HHZ. 2019-08-16T20:15:45.69 0.3 undecidable manual P 285 0.0234 109 0.23 72
IV.VVDG.HHZ. 2019-08-16T20:15:45.55 0.3 undecidable manual S 351 0.0144 119 -0.19 72
IV.VBKN.HHZ. 2019-08-16T20:15:45.19 0.3 undecidable manual S 15 0.009 132 -0.07 74
IV.CRTO.HHZ. 2019-08-16T20:15:44.60 0.1 positive manual P 270 0.0036 158 0.12 98
IV.VVDG.HHZ. 2019-08-16T20:15:44.99 0.1 undecidable manual P 351 0.0144 119 0.04 100
IV.VBKN.HHZ. 2019-08-16T20:15:44.85 0.1 positive manual P 15 0.009 132 0.16 97
IV.VCNE.EHZ. 2019-08-16T20:15:44.74 0.1 undecidable manual P 46 0.0081 137 0.11 98
IV.VCRE.HHZ. 2019-08-16T20:15:44.75 0.3 undecidable manual S 122 0.0045 153 -0.19 73
IV.VTIR.HHZ. 2019-08-16T20:15:44.93 0.1 undecidable manual P 187 0.0153 118 -0.07 99
IV.CRTO.HHZ. 2019-08-16T20:15:44.98 0.3 undecidable manual S 270 0.0036 158 0.08 74
IV.VCRE.HHZ. 2019-08-16T20:15:44.53 0.1 undecidable manual P 122 0.0045 153 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VCRE.HHZ. Md:1.4 13 END duration s
IV.CRTO.HHZ. Md:1.8 23 END duration s
IV.VCNE.EHZ. Md:1.7 20 END duration s
IV.VBKN.HHZ. Md:1.5 16 END duration s
IV.VTIR.HHZ. Md:1.9 24 END duration s
IV.VVDG.HHZ. Md:1.7 20 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