Earthquake with magnitude of Md 2.3 on date 28-12-2020 and time 09:09:42 (Italy) in region Campi Flegrei

A magnitude Md 2.3 earthquake occured in region: Campi Flegrei, on

  • 28-12-2020 08:09:42 (UTC)
  • 28-12-2020 09:09:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.83, 14.15 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
Pozzuoli NA 5 81661 81661
Quarto NA 6 40930 122591
Bacoli NA 7 26560 149151
Napoli NA 9 974074 1123225
Marano di Napoli NA 9 59874 1183099
Monte di Procida NA 9 12886 1195985
Calvizzano NA 10 12329 1208314
Mugnano di Napoli NA 10 34828 1243142
Qualiano NA 10 25702 1268844
Villaricca NA 11 31122 1299966
Giugliano in Campania NA 12 122974 1422940
Procida NA 13 10530 1433470
Melito di Napoli NA 13 37826 1471296
Casavatore NA 13 18661 1489957
Arzano NA 14 34886 1524843
Sant'Antimo NA 14 33905 1558748
Parete CE 14 11442 1570190
Casoria NA 15 77642 1647832
Casandrino NA 15 14336 1662168
Grumo Nevano NA 15 18061 1680229
San Giorgio a Cremano NA 16 45557 1725786
Lusciano CE 16 15362 1741148
Frattamaggiore NA 16 30329 1771477
Cesa CE 17 8841 1780318
Ercolano NA 17 53709 1834027
Trentola-Ducenta CE 17 19429 1853456
Sant'Arpino CE 17 14307 1867763
Aversa CE 17 53047 1920810
Afragola NA 17 65057 1985867
Portici NA 17 55274 2041141
Frattaminore NA 18 16208 2057349
Volla NA 18 23755 2081104
Succivo CE 18 8457 2089561
San Marcellino CE 18 14155 2103716
Cercola NA 18 18267 2121983
Casapesenna CE 18 6987 2128970
Crispano NA 18 12354 2141324
Cardito NA 18 22755 2164079
Gricignano di Aversa CE 19 11881 2175960
Orta di Atella CE 19 27191 2203151
Torre del Greco NA 19 86275 2289426
Frignano CE 19 9008 2298434
San Sebastiano al Vesuvio NA 19 9196 2307630
Carinaro CE 19 7181 2314811
Teverola CE 19 14291 2329102
Villa di Briano CE 19 7087 2336189
Caivano NA 19 37879 2374068
San Cipriano d'Aversa CE 19 13653 2387721
Massa di Somma NA 19 5444 2393165
Casalnuovo di Napoli NA 20 49855 2443020
Pollena Trocchia NA 20 13562 2456582
Casaluce CE 20 10078 2466660
Ischia NA 20 19915 2486575

Municipalities with at least 50000 inhabitants

An earthquake occurred to
5 Km E of Pozzuoli (81661 inhabitants)
9 Km W of Napoli (974074 inhabitants)
9 Km SW of Marano di Napoli (59874 inhabitants)
12 Km SW of Giugliano in Campania (122974 inhabitants)
15 Km SW of Casoria (77642 inhabitants)
17 Km W of Ercolano (53709 inhabitants)
17 Km S of Aversa (53047 inhabitants)
17 Km SW of Afragola (65057 inhabitants)
17 Km W of Portici (55274 inhabitants)
19 Km W of Torre del Greco (86275 inhabitants)
23 Km SW of Acerra (59573 inhabitants)
32 Km W of Castellammare di Stabia (66466 inhabitants)
32 Km SW of Caserta (76326 inhabitants)
33 Km W of Scafati (50787 inhabitants)
49 Km W of Cava de' Tirreni (53659 inhabitants)
54 Km W of Salerno (135261 inhabitants)
55 Km W of Avellino (54857 inhabitants)
63 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 72 hours (3 days) preceding the time of the current earthquake occurrence, using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. 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 in the 90 days preceding the time of the current earthquake occurrence, 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
Bulletin
Rev1000
Md 2.3 2020-12-28
08:09:42
40.83 14.15 2 2021-02-26
14:56:15
Bollettino Sismico Italiano INGV 86355021
Reviewed
Rev200
Md 2.6 2020-12-28
08:09:43
40.83 14.15 2 2021-01-27
17:11:39
Sala Operativa INGV_OV (Napoli) 85780861
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2020-12-28 08:09:42 ± 0.11
Latitude 40.83 ± 0.00
Longitude 14.15 ± 0.00
Depth (km) 2 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 86355021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 236
Semi-minor axis of confidence ellipse (meter) 79
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 323
Circular confidence region, given by single value of horizontal uncertainty (meter) 240
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 145
Number of associated phases, regardless of their use for origin computation 32
Number of defining phases 32
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) 0.23382
Number of stations at which the event was observed 22
Number of stations from which data was used for origin computation 22
Magnitudes information

Md:2.3

Field Value
Value 2.3
Uncertainty 0.2
Num. used stations 12
Type of magnitude Md
Reference to an origin 86355021
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-01-27 17:11:27

Md:2.6

Field Value
Value 2.6
Uncertainty 0.3
Num. used stations
Type of magnitude Md
Reference to an origin 85780861
Agency INGV
Autore Sala Operativa INGV_OV (Napoli)
Time of creation (UTC) 2020-12-28 08:20:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.VTIR.HHN. 2020-12-28T08:09:49.17 1.0 undecidable manual P 0.2086 -6.19 0
IV.ICVJ.EHN. 2020-12-28T08:09:49.09 0.1 undecidable manual P 0.2104 -6.41 0
IV.IMTC.HHE. 2020-12-28T08:09:49.01 1.0 undecidable manual P 0.2338 -5.71 0
IV.OVO.HHE. 2020-12-28T08:09:48.06 0.6 undecidable manual P 0.1862 -5.98 0
IV.VVDG.HHE. 2020-12-28T08:09:48.38 0.1 undecidable manual P 0.2068 -6.89 0
IV.IOCA.HHZ. 2020-12-28T08:09:48.96 0.1 undecidable manual P 0.2059 -6.25 0
IV.VCRE.HHZ. 2020-12-28T08:09:48.92 0.1 undecidable manual P 0.2131 -6.7 0
IV.VBKN.HHN. 2020-12-28T08:09:48.60 0.6 undecidable manual P 0.2113 -6.94 0
IV.CRTO.HHE. 2020-12-28T08:09:48.88 0.1 undecidable manual P 0.2059 -6.32 0
IV.ICAI.EHN. 2020-12-28T08:09:47.97 0.1 undecidable manual P 0.17 -5.1 0
IV.CMSN.HHZ. 2020-12-28T08:09:46.05 0.6 undecidable manual S 67 0.0261 127 -0.19 29
IV.CFMN.HHZ. 2020-12-28T08:09:46.57 0.3 undecidable manual S 276 0.0432 114 -1.28 0
IV.CFB2.HHZ. 2020-12-28T08:09:46.48 0.6 undecidable manual S 208 0.027 126 0.14 25
IV.CFB3.HHZ. 2020-12-28T08:09:46.01 0.6 undecidable manual S 213 0.0225 130 0.02 42
IV.CMIS.HHE. 2020-12-28T08:09:46.44 1.0 undecidable manual P 223 0.0683 106 -0.6 0
IV.CFB1.HHE. 2020-12-28T08:09:46.59 0.6 undecidable manual S 231 0.0279 125 0.13 19
IX.NAPI.HNZ.01 2020-12-28T08:09:46.02 0.6 undecidable manual S 62 0.0252 127 -0.19 31
IV.CAAM.HHN. 2020-12-28T08:09:45.18 0.6 undecidable manual S 222 0.0108 151 0.01 51
IV.CFMN.HHZ. 2020-12-28T08:09:45.11 0.1 positive manual P 276 0.0432 114 -0.51 0
IV.CPOZ.HHN. 2020-12-28T08:09:45.89 0.6 undecidable manual S 254 0.0252 128 -0.27 33
IV.CBAC.EHE. 2020-12-28T08:09:45.29 0.1 undecidable manual P 250 0.054 110 -0.96 0
IV.CSFT.HHN. 2020-12-28T08:09:44.87 0.6 undecidable manual S 277 0.0081 158 -0.16 49
IV.CFB1.HHE. 2020-12-28T08:09:44.75 0.1 undecidable manual P 231 0.0279 125 -0.09 38
IV.CSOB.HHZ. 2020-12-28T08:09:44.88 0.6 undecidable manual S 262 0.0045 167 -0.04 51
IX.NAPI.HNZ.01 2020-12-28T08:09:44.81 0.3 undecidable manual P 62 0.0252 127 0.11 48
IV.CSFT.HHN. 2020-12-28T08:09:44.19 0.1 negative manual P 277 0.0081 158 0.14 99
IV.CMSN.HHZ. 2020-12-28T08:09:44.67 0.1 undecidable manual P 67 0.0261 127 -0.05 60
IV.CFB2.HHZ. 2020-12-28T08:09:44.68 0.1 undecidable manual P 208 0.027 126 -0.1 50
IV.CSOB.HHZ. 2020-12-28T08:09:44.25 0.1 undecidable manual P 262 0.0045 167 0.27 97
IV.CAAM.HHN. 2020-12-28T08:09:44.23 0.1 undecidable manual P 222 0.0108 151 0.11 100
IV.CFB3.HHZ. 2020-12-28T08:09:44.43 0.1 undecidable manual P 213 0.0225 130 -0.15 82
IV.CPOZ.HHN. 2020-12-28T08:09:44.54 0.1 undecidable manual P 254 0.0252 128 -0.14 68
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.CSFT.HHN. Md:2.1 30 END duration s
IV.CAAM.HHN. Md:2.3 37 END duration s
IV.CSOB.HHZ. Md:2.1 29 END duration s
IV.CFB3.HHZ. Md:2.4 44 END duration s
IV.CPOZ.HHN. Md:2.3 39 END duration s
IV.CMSN.HHZ. Md:2.2 36 END duration s
IV.CFB2.HHZ. Md:2.6 51 END duration s
IV.CFB1.HHE. Md:2.5 46 END duration s
IX.NAPI.HNZ.01 Md:2 28 END duration s
IV.CFMN.HHZ. Md:2.2 35 END duration s
IV.CBAC.EHE. Md:2.3 40 END duration s
IV.CMIS.HHE. Md:2.2 33 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 miniseed + resp format Download