INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of Md 2.5 on date 08-08-2018 and time 10:02:57 (Italy) in region 1 km S Casamicciola Terme (NA)

A magnitude Md 2.5 earthquake occured in region: 1 km S Casamicciola Terme (NA), on

  • 08-08-2018 08:02:57 (UTC)
  • 08-08-2018 10:02:57 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 40.74, 13.91 at 2 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
Casamicciola Terme NA 1 8362 8362
Lacco Ameno NA 3 4853 13215
Serrara Fontana NA 3 3173 16388
Barano d'Ischia NA 3 10113 26501
Ischia NA 3 19915 46416
Forio NA 4 17615 64031
Procida NA 11 10530 74561
Monte di Procida NA 14 12886 87447
Bacoli NA 16 26560 114007
Pozzuoli NA 20 81661 195668

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km SW of Pozzuoli (81661 inhabitants)
30 Km SW of Marano di Napoli (59874 inhabitants)
31 Km W of Napoli (974074 inhabitants)
33 Km SW of Giugliano in Campania (122974 inhabitants)
37 Km SW of Aversa (53047 inhabitants)
38 Km SW of Casoria (77642 inhabitants)
38 Km W of Ercolano (53709 inhabitants)
39 Km W of Portici (55274 inhabitants)
39 Km W of Torre del Greco (86275 inhabitants)
40 Km SW of Afragola (65057 inhabitants)
46 Km SW of Acerra (59573 inhabitants)
49 Km W of Castellammare di Stabia (66466 inhabitants)
52 Km SW of Caserta (76326 inhabitants)
52 Km W of Scafati (50787 inhabitants)
68 Km W of Cava de' Tirreni (53659 inhabitants)
72 Km W of Salerno (135261 inhabitants)
78 Km W of Avellino (54857 inhabitants)
86 Km SW of Benevento (60091 inhabitants)
92 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 200 Md 2.5 2018-08-08
08:02:57
40.74 13.91 2 2018-08-09
11:25:46
Sala Operativa INGV-OV (Napoli) 59552131
Rev 200 Md 2.5 2018-08-08
08:02:00
40.74 13.91 2 2018-08-09
09:19:08
Sala Operativa INGV-OV (Napoli) 59508211
Rev 100 Md 2.5 2018-08-08
08:02:57
40.73 13.92 0 2018-08-09
09:17:38
Sala Sismica INGV-Roma 59549711
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-08-08 08:02:57 ± 0
Latitude 40.74
Longitude 13.91
Depth (km) 2 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 200 -> SURVEY-INGV-OV
Event type earthquake
Origin ID 59552131

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) 0
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
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty 0.2
Num. used stations 3
Type of magnitude Md
Reference to an origin 59549711
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-08-09 09:17:37

Md:2.5

Field Value
Value 2.5
Uncertainty 0
Num. used stations
Type of magnitude Md
Reference to an origin 59508211
Agency INGV
Autore Sala Operativa INGV-OV (Napoli)
Time of creation (UTC) 2018-08-08 08:44:22

Md:2.5

Field Value
Value 2.5
Uncertainty 0
Num. used stations
Type of magnitude Md
Reference to an origin 59552131
Agency INGV
Autore Sala Operativa INGV-OV (Napoli)
Time of creation (UTC) 2018-08-09 11:25:46
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://cnt.rm.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