Earthquake with magnitude of ML 2.0 on date 04-04-2021 and time 02:31:00 (Italy) in region 1 km SE Forchia (BN)

A magnitude ML 2.0 earthquake occured in region: 1 km SE Forchia (BN), on

  • 04-04-2021 00:31:00 (UTC)
  • 04-04-2021 02:31:00 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.024, 14.548 at 5 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
Forchia BN 1 1235 1235
Arpaia BN 2 1992 3227
Paolisi BN 3 2072 5299
Rotondi AV 4 3591 8890
Arienzo CE 5 5365 14255
Airola BN 5 8195 22450
San Felice a Cancello CE 6 17568 40018
Roccarainola NA 6 7082 47100
Cervinara AV 6 9658 56758
Moiano BN 6 4094 60852
Bucciano BN 6 2100 62952
Cicciano NA 7 12906 75858
Santa Maria a Vico CE 7 14022 89880
Camposano NA 8 5333 95213
Tufino NA 8 3776 98989
Comiziano NA 8 1814 100803
Bonea BN 8 1448 102251
Avella AV 8 7890 110141
Sant'Agata de' Goti BN 8 11216 121357
Montesarchio BN 9 13500 134857
Sperone AV 9 3706 138563
Durazzano BN 9 2230 140793
Cimitile NA 10 7280 148073
Baiano AV 10 4718 152791
San Martino Valle Caudina AV 10 4884 157675
Casamarciano NA 10 3289 160964
Cervino CE 11 5031 165995
Sirignano AV 11 2933 168928
Nola NA 11 34431 203359
Quadrelle AV 11 1865 205224
Visciano NA 12 4454 209678
San Paolo Bel Sito NA 12 3513 213191
Mugnano del Cardinale AV 12 5373 218564
San Vitaliano NA 12 6461 225025
Valle di Maddaloni CE 13 2742 227767
Saviano NA 13 15982 243749
Scisciano NA 13 5994 249743
Pannarano BN 13 2130 251873
Marigliano NA 13 30157 282030
Tocco Caudio BN 13 1508 283538
Liveri NA 14 1607 285145
Maddaloni CE 14 39166 324311
Marzano di Nola AV 14 1727 326038
Mariglianella NA 14 7787 333825
Roccabascerana AV 14 2354 336179
Campoli del Monte Taburno BN 15 1546 337725
Dugenta BN 15 2798 340523
Pago del Vallo di Lauro AV 15 1830 342353
Frasso Telesino BN 15 2318 344671
Apollosa BN 15 2658 347329
Brusciano NA 16 16466 363795
Pietrastornina AV 16 1553 365348
Melizzano BN 16 1858 367206
Cautano BN 16 2044 369250
Domicella AV 16 1862 371112
Arpaise BN 17 761 371873
Castello di Cisterna NA 17 7869 379742
Carbonara di Nola NA 17 2429 382171
Sant'Angelo a Scala AV 17 730 382901
Acerra NA 17 59573 442474
San Marco Evangelista CE 17 6532 449006
Taurano AV 17 1546 450552
Palma Campania NA 17 15978 466530
Lauro AV 18 3509 470039
Ceppaloni BN 18 3415 473454
Foglianise BN 18 3385 476839
San Gennaro Vesuviano NA 18 11966 488805
Limatola BN 18 4073 492878
Pomigliano d'Arco NA 18 39922 532800
Castelpoto BN 18 1254 534054
San Nicola la Strada CE 19 22448 556502
San Leucio del Sannio BN 19 3106 559608
Summonte AV 19 1583 561191
Vitulano BN 19 2944 564135
Caserta CE 19 76326 640461
Solopaca BN 19 3820 644281
Moschiano AV 19 1673 645954
Ospedaletto d'Alpinolo AV 19 2145 648099
Castel Morrone CE 19 3858 651957
Altavilla Irpina AV 19 4196 656153
Castel Campagnano CE 19 1581 657734
Somma Vesuviana NA 20 35233 692967
Mercogliano AV 20 12267 705234
Quindici AV 20 1938 707172

Municipalities with at least 50000 inhabitants

An earthquake occurred to
17 Km NE of Acerra (59573 inhabitants)
19 Km E of Caserta (76326 inhabitants)
23 Km SW of Benevento (60091 inhabitants)
23 Km NE of Afragola (65057 inhabitants)
24 Km NW of Avellino (54857 inhabitants)
25 Km NE of Casoria (77642 inhabitants)
28 Km NE of Portici (55274 inhabitants)
29 Km NE of Ercolano (53709 inhabitants)
29 Km E of Aversa (53047 inhabitants)
30 Km NE of Torre del Greco (86275 inhabitants)
31 Km N of Scafati (50787 inhabitants)
31 Km E of Giugliano in Campania (122974 inhabitants)
32 Km NE of Napoli (974074 inhabitants)
33 Km E of Marano di Napoli (59874 inhabitants)
37 Km N of Castellammare di Stabia (66466 inhabitants)
38 Km NW of Cava de' Tirreni (53659 inhabitants)
42 Km NW of Salerno (135261 inhabitants)
43 Km E of Pozzuoli (81661 inhabitants)
59 Km NW of Battipaglia (50786 inhabitants)
97 Km SW of Foggia (151991 inhabitants)
Recent and historical seismicity

These maps show the seismic activity in different time intervals, before the seismic event to which they refer. Data reported in the first two maps come from the analysis carried out in real time by the personnel of the INGV Operating Rooms, immediately after each earthquake. The third map shows data from 1985 to the date of the earthquake: the locations are reviewed by the seismological analysts of the INGV Italian Seismic Bulletin (Bollettino Sismico Italiano dell’INGV). The localization parameters (hypocentral coordinates and magnitude) are the best possible estimate with the data available to the INGV, but are constantly updated according to further data that become available. The location and magnitude parameters, subsequently reviewed by seismological analysts, may vary.

Earthquakes of the 3 days preceding this event

Earthquakes of the 3 days preceding this event *

This map shows the earthquake epicenters with magnitude ≥ 0.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 72 hours preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes of the 90 days preceding this event

Earthquakes of the 90 days preceding this event *

This map shows the earthquake epicenters with magnitude ≥ 2.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, in the 90 days preceding this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes from 1985 to the date of the event

Earthquakes from 1985 to the date of the event *

This map shows the earthquake epicenters with magnitude ≥ 3.0, localized with data recorded by the National Seismic Network and other collaborative networks both in Italy and in neighboring countries, from 1985 to the date of this event. The size of the circle indicates the different classes of magnitude. The colors indicate the different time intervals preceding the seismic event. The black and white star is the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2019

Earthquakes since 1000 AD until 2019 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version 3.0, https://doi.org/10.13127/cpti/cpti15.3) since 1000 AD until 2019. The size of the square indicates the different classes of magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The black and white star is the epicenter of the current earthquake.
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire *

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
ML 2.0 2021-04-04
00:31:00
41.0243 14.5483 5 2021-07-12
16:55:13
Bollettino Sismico Italiano INGV 90642181
Reviewed
Rev100
ML 2.0 2021-04-04
00:31:00
41.0078 14.5527 8 2021-04-04
00:50:13
Sala Sismica INGV-Roma 88754191
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-04-04 00:31:00 ± 0.11
Latitude 41.0243 ± 0.0054
Longitude 14.5483 ± 0.0095
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 90642181

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 890
Semi-minor axis of confidence ellipse (meter) 550
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 292
Circular confidence region, given by single value of horizontal uncertainty (meter) 890
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 92
Number of associated phases, regardless of their use for origin computation 24
Number of defining phases 24
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.39
Epicentral distance of station closest to the epicenter (degree) 0.01619
Epicentral distance of station farthest from the epicenter (degree) 0.3912
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

Field Value
Value 2
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 90642181
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2021-05-30 23:23:55

ML:2

Field Value
Value 2
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 88754191
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-04-04 00:50:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.PIGN.HHZ. 2021-04-04T00:31:12.00 0.6 undecidable manual S 302 0.3283 98 -1.05 36
IV.SGG.HNE. 2021-04-04T00:31:09.65 0.3 undecidable manual P 341 0.384 97 0.77 60
IV.VVDG.HHE. 2021-04-04T00:31:09.54 0.6 undecidable manual S 207 0.2104 102 0.96 38
IV.SACR.HNN. 2021-04-04T00:31:09.04 0.3 undecidable manual P 18 0.3912 97 0 74
IV.VTIR.HHZ. 2021-04-04T00:31:09.95 0.6 undecidable manual S 203 0.2374 101 0.36 47
IV.VBKN.HHN. 2021-04-04T00:31:09.27 0.6 undecidable manual S 205 0.214 102 0.57 45
IV.VITU.HHZ. 2021-04-04T00:31:08.03 0.6 undecidable manual S 21 0.17 105 0.96 38
IV.PIGN.HHZ. 2021-04-04T00:31:07.12 0.1 undecidable manual P 302 0.3283 98 -0.53 89
IV.PSB1.HHZ. 2021-04-04T00:31:07.06 0.3 undecidable manual P 45 0.2806 99 0.47 69
IT.AVL.HNZ. 2021-04-04T00:31:07.98 0.6 undecidable manual S 119 0.2068 102 -0.44 47
IV.MRB1.HHZ. 2021-04-04T00:31:07.55 0.3 undecidable manual P 73 0.331 98 -0.16 73
IV.OVO.HHZ. 2021-04-04T00:31:05.54 0.6 undecidable manual P 210 0.2275 101 0.1 50
IV.VTIR.HHZ. 2021-04-04T00:31:05.59 0.3 undecidable manual P 203 0.2374 101 -0.07 75
IV.VBKN.HHN. 2021-04-04T00:31:05.19 0.3 undecidable manual P 205 0.214 102 0.05 76
IV.CRTO.HHZ. 2021-04-04T00:31:05.49 0.3 undecidable manual P 205 0.2239 101 0.12 75
IX.BENI.HNZ.01 2021-04-04T00:31:05.75 0.3 undecidable manual P 58 0.1988 103 0.94 58
IV.VCRE.HHZ. 2021-04-04T00:31:05.32 0.3 undecidable manual P 203 0.223 101 -0.03 76
IV.VVDG.HHE. 2021-04-04T00:31:05.05 0.3 undecidable manual P 207 0.2104 102 -0.02 76
IT.AVL.HNZ. 2021-04-04T00:31:04.29 0.3 undecidable manual P 119 0.2068 102 -0.69 64
IV.VITU.HHZ. 2021-04-04T00:31:04.01 0.3 undecidable manual P 21 0.17 105 -0.19 74
IV.NL9.EHZ. 2021-04-04T00:31:04.65 0.6 undecidable manual S 181 0.1034 113 0.01 52
IV.NL9.EHZ. 2021-04-04T00:31:02.51 0.1 undecidable manual P 181 0.1034 113 -0.28 98
IV.PAOL.HHZ. 2021-04-04T00:31:01.56 0.6 undecidable manual S 64 0.0162 160 -0.56 47
IV.PAOL.HHZ. 2021-04-04T00:31:01.05 0.1 undecidable manual P 64 0.0162 160 -0.29 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.VITU.HHE. ML:2.5 0.002815 0.34 AML other m 2021-04-04T00:31:10.35
IV.VITU.HNE. ML:1.8 0.0006345 1.36 AML other m 2021-04-04T00:31:11.21
IV.VITU.HNN. ML:2.4 0.00226 0.44 AML other m 2021-04-04T00:31:12.67
IV.VITU.HHN. ML:2.4 0.002365 0.44 AML other m 2021-04-04T00:31:12.67
IV.CRTO.HHE. ML:3 0.006295 1.56 AML other m 2021-04-04T00:31:15.98
IV.PIGN.HNE. ML:1.8 0.000271 0.92 AML other m 2021-04-04T00:31:15.53
IV.PIGN.HHE. ML:1.9 0.0003035 1.1 AML other m 2021-04-04T00:31:18.91
IV.PIGN.HNN. ML:1.8 0.0002635 1.12 AML other m 2021-04-04T00:31:18.34
IV.VTIR.HHN. ML:2 0.000549 0.36 AML other m 2021-04-04T00:31:19.23
IV.PSB1.HNE. ML:1.8 0.0002695 0.52 AML other m 2021-04-04T00:31:19.75
IV.PSB1.HHE. ML:1.7 0.000267 0.54 AML other m 2021-04-04T00:31:19.76
IV.PIGN.HHN. ML:1.7 0.0002115 1.2 AML other m 2021-04-04T00:31:19.93
IV.CRTO.HHN. ML:2.7 0.00352 0.82 AML other m 2021-04-04T00:31:20.07
IV.VTIR.HHE. ML:2.1 0.0006995 1.08 AML other m 2021-04-04T00:31:20.75
IV.PSB1.HHN. ML:1.7 0.000247 1 AML other m 2021-04-04T00:31:21.80
IV.PSB1.HNN. ML:1.7 0.00025 1.04 AML other m 2021-04-04T00:31:21.81
IV.MRB1.HNN. ML:2.1 0.000592 1.58 AML other m 2021-04-04T00:31:21.83
IV.MRB1.HHN. ML:2.2 0.0006145 0.64 AML other m 2021-04-04T00:31:23.68
IV.MRB1.HHE. ML:2.1 0.000568 0.54 AML other m 2021-04-04T00:31:27.81
IV.MRB1.HNE. ML:2.1 0.000552 1.38 AML other m 2021-04-04T00:31:28.83
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Fault Plane solutions

Fault Plane solutions *

The map reports the fault plane solutions for earthquakes in the region from 1977 to the date of this event. Red moment tensors are determined using the Regional Centroid Moment Tensor technique (RCMT, http://www.bo.ingv.it/RCMT) applied for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when a station azimuthal coverage exists RCMTs can be obtained also for earthquakes with magnitude down to 4.0. The gray moment tensors are obtained with the Time Domain Moment Tensor method (TDMT, http://terremoti.ingv.it/tdmt). This technique is applied to earthquakes with magnitude ML greater than 3.2, when it is possible. The size of symbols 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