Earthquake with magnitude of ML 2.1 on date 18-09-2018 and time 23:36:42 (Italy) in region 4 km SE Quarto (NA)

A magnitude ML 2.1 earthquake occured in region: 4 km SE Quarto (NA), on

  • 18-09-2018 21:36:42 (UTC)
  • 18-09-2018 23:36:42 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.84, 14.16 at 2 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
Quarto NA 4 40930 40930
Pozzuoli NA 6 81661 122591
Marano di Napoli NA 7 59874 182465
Calvizzano NA 8 12329 194794
Napoli NA 8 974074 1168868
Mugnano di Napoli NA 8 34828 1203696
Qualiano NA 9 25702 1229398
Bacoli NA 9 26560 1255958
Villaricca NA 9 31122 1287080
Giugliano in Campania NA 10 122974 1410054
Monte di Procida NA 11 12886 1422940
Melito di Napoli NA 11 37826 1460766
Casavatore NA 11 18661 1479427
Arzano NA 12 34886 1514313
Sant'Antimo NA 12 33905 1548218
Parete CE 13 11442 1559660
Casandrino NA 13 14336 1573996
Casoria NA 13 77642 1651638
Grumo Nevano NA 13 18061 1669699
Lusciano CE 14 15362 1685061
Frattamaggiore NA 14 30329 1715390
Cesa CE 14 8841 1724231
Procida NA 15 10530 1734761
San Giorgio a Cremano NA 15 45557 1780318
Trentola-Ducenta CE 15 19429 1799747
Sant'Arpino CE 15 14307 1814054
Aversa CE 15 53047 1867101
Afragola NA 15 65057 1932158
Frattaminore NA 16 16208 1948366
Succivo CE 16 8457 1956823
San Marcellino CE 16 14155 1970978
Crispano NA 16 12354 1983332
Ercolano NA 16 53709 2037041
Cardito NA 16 22755 2059796
Volla NA 16 23755 2083551
Portici NA 16 55274 2138825
Casapesenna CE 16 6987 2145812
Orta di Atella CE 16 27191 2173003
Gricignano di Aversa CE 16 11881 2184884
Cercola NA 17 18267 2203151
Carinaro CE 17 7181 2210332
Frignano CE 17 9008 2219340
Teverola CE 17 14291 2233631
Villa di Briano CE 17 7087 2240718
Caivano NA 17 37879 2278597
San Cipriano d'Aversa CE 18 13653 2292250
San Sebastiano al Vesuvio NA 18 9196 2301446
Casalnuovo di Napoli NA 18 49855 2351301
Casaluce CE 18 10078 2361379
Massa di Somma NA 18 5444 2366823
Torre del Greco NA 18 86275 2453098
Pollena Trocchia NA 18 13562 2466660
Casal di Principe CE 18 21389 2488049
Villa Literno CE 20 11985 2500034

Municipalities with at least 50000 inhabitants

An earthquake occurred to
6 Km E of Pozzuoli (81661 inhabitants)
7 Km SW of Marano di Napoli (59874 inhabitants)
8 Km W of Napoli (974074 inhabitants)
10 Km SW of Giugliano in Campania (122974 inhabitants)
13 Km SW of Casoria (77642 inhabitants)
15 Km S of Aversa (53047 inhabitants)
15 Km SW of Afragola (65057 inhabitants)
16 Km W of Ercolano (53709 inhabitants)
16 Km W of Portici (55274 inhabitants)
18 Km W of Torre del Greco (86275 inhabitants)
21 Km SW of Acerra (59573 inhabitants)
29 Km SW of Caserta (76326 inhabitants)
32 Km NW of Castellammare di Stabia (66466 inhabitants)
33 Km W of Scafati (50787 inhabitants)
49 Km W of Cava de' Tirreni (53659 inhabitants)
54 Km W of Salerno (135261 inhabitants)
54 Km W of Avellino (54857 inhabitants)
61 Km SW of Benevento (60091 inhabitants)
74 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 ML 2.1 2018-09-18
21:36:42
40.84 14.16 2 2019-06-04
09:15:54
Bollettino Sismico Italiano INGV 61095441
Rev 200 Md 2.5 2018-09-18
21:36:42
40.83 14.15 2 2019-05-09
10:02:24
Sala Operativa INGV-OV (Napoli) 61082551
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-09-18 21:36:42 ± 0.07
Latitude 40.84 ± 0.02
Longitude 14.16 ± 0.00
Depth (km) 2 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 61095441

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 2020
Semi-minor axis of confidence ellipse (meter) 320
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 357
Circular confidence region, given by single value of horizontal uncertainty (meter) 2020
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 127
Number of associated phases, regardless of their use for origin computation 19
Number of defining phases 19
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.22
Epicentral distance of station closest to the epicenter (degree) 0.02338
Epicentral distance of station farthest from the epicenter (degree) 0.48833
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 16
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 61095441
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-05-09 10:01:25

Md:2.5

Field Value
Value 2.5
Uncertainty 0
Num. used stations
Type of magnitude Md
Reference to an origin 61082551
Agency INGV
Autore Sala Operativa INGV-OV (Napoli)
Time of creation (UTC) 2018-09-18 22:37:24
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VITU.HHZ. 2018-09-18T21:36:53.24 0.3 undecidable manual P 46 0.4883 92 -0.43 0
IV.PAOL.HHN. 2018-09-18T21:36:51.31 0.6 undecidable manual P 58 0.3579 93 0.54 0
IV.MODR.HHE. 2018-09-18T21:36:49.68 0.3 undecidable manual P 325 0.3696 93 -1.36 0
IV.PIGN.HNE. 2018-09-18T21:36:49.54 0.3 undecidable manual P 2 0.3552 93 -1.17 0
IV.IFOR.HHN. 2018-09-18T21:36:48.98 0.3 undecidable manual P 240 0.268 94 0.2 42
IV.IMTC.HHE. 2018-09-18T21:36:48.30 0.3 undecidable manual P 240 0.25 95 -0.08 56
IV.CRTO.HHZ. 2018-09-18T21:36:47.39 0.3 undecidable manual P 97 0.1979 96 0.17 75
IV.VBKN.HHZ. 2018-09-18T21:36:47.14 0.3 undecidable manual P 94 0.2023 96 -0.19 74
IV.VCRE.HHZ. 2018-09-18T21:36:47.55 0.3 undecidable manual P 97 0.205 96 0.17 73
IV.OVO.HHZ. 2018-09-18T21:36:47.10 0.1 undecidable manual P 95 0.1781 97 0.32 98
IV.VVDG.HHE. 2018-09-18T21:36:47.00 0.3 undecidable manual P 93 0.1979 96 -0.22 74
IV.VTIR.HHZ. 2018-09-18T21:36:47.11 0.3 undecidable manual P 101 0.2014 96 -0.19 75
IV.IOCA.HHZ. 2018-09-18T21:36:47.85 0.3 undecidable manual P 244 0.2212 95 0.11 69
IV.CFMN.HHN. 2018-09-18T21:36:45.40 0.3 undecidable manual S 257 0.054 111 0.39 74
IV.CPOZ.HHE. 2018-09-18T21:36:44.60 0.3 undecidable manual S 235 0.0405 117 0.05 77
IV.CPOZ.HHE. 2018-09-18T21:36:43.36 0.1 undecidable manual P 235 0.0405 117 -0.45 96
IV.CSFT.HHZ. 2018-09-18T21:36:43.80 0.3 undecidable manual S 228 0.0234 132 -0.2 76
IV.CSFT.HHZ. 2018-09-18T21:36:43.07 0.1 negative manual P 228 0.0234 132 -0.42 96
IV.CFMN.HHN. 2018-09-18T21:36:43.91 0.1 positive manual P 257 0.054 111 -0.17 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CRTO.HHN. ML:2.3 0.001639357 0.4608 AML other m 2018-09-18T21:37:01.72
IV.OVO.HHN. ML:2.1 0.001184665 0.576 AML other m 2018-09-18T21:37:00.74
IV.OVO.HHE. ML:2 0.0008746906 0.5248 AML other m 2018-09-18T21:36:59.50
IV.VTIR.HHN. ML:1.5 0.0002093931 0.1792 AML other m 2018-09-18T21:37:00.97
IV.VTIR.HHE. ML:1.7 0.00036219235 0.2304 AML other m 2018-09-18T21:36:57.64
IV.VBKN.HHE. ML:2.3 0.0013820035 0.4096 AML other m 2018-09-18T21:36:57.79
IV.VBKN.HHN. ML:2.2 0.001308034 0.3584 AML other m 2018-09-18T21:37:00.06
IV.CRTO.HHE. ML:2.7 0.0039972715 0.4608 AML other m 2018-09-18T21:37:01.67
IV.VCRE.HHN. ML:2.1 0.000863091 0.3584 AML other m 2018-09-18T21:37:02.20
IV.VCRE.HHE. ML:2 0.0006662096 0.5248 AML other m 2018-09-18T21:36:58.85
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