Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.6 on date 27-05-1999 and time 10:35:35 (UTC) in region 4 km W Ferrazzano (CB)

A magnitude Md 2.6 earthquake occured in region: 4 km W Ferrazzano (CB), on

  • 27-05-1999 10:35:35 (UTC)
  • 27-05-1999 12:35:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 41.5240, 14.6310 at 12 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Ferrazzano CB 4 3344 3344
Mirabello Sannitico CB 4 2180 5524
Campobasso CB 5 49431 54955
Vinchiaturo CB 5 3324 58279
Baranello CB 6 2673 60952
Busso CB 7 1273 62225
San Giuliano del Sannio CB 8 1029 63254
Cercepiccola CB 8 681 63935
Oratino CB 8 1641 65576
Gildone CB 9 809 66385
Colle d'Anchise CB 9 807 67192
Ripalimosani CB 10 3114 70306
Cercemaggiore CB 10 3777 74083
Campodipietra CB 11 2570 76653
Casalciprano CB 11 564 77217
Matrice CB 12 1115 78332
Spinete CB 12 1320 79652
Guardiaregia CB 12 801 80453
Castropignano CB 12 947 81400
San Giovanni in Galdo CB 12 580 81980
Toro CB 13 1391 83371
Sepino CB 13 1964 85335
Campochiaro CB 13 646 85981
San Polo Matese CB 13 470 86451
Jelsi CB 14 1781 88232
Bojano CB 14 8058 96290
Montagano CB 14 1086 97376
Sant'Elena Sannita IS 15 275 97651
Torella del Sannio CB 16 795 98446
Molise CB 17 167 98613
Sassinoro BN 17 618 99231
Campolieto CB 17 839 100070
Limosano CB 17 768 100838
Santa Croce del Sannio BN 17 927 101765
Frosolone IS 17 3170 104935
Riccia CB 18 5262 110197
Monacilioni CB 18 523 110720
Fossalto CB 18 1345 112065
San Massimo CB 19 855 112920
Sant'Angelo Limosano CB 19 352 113272
Macchiagodena IS 19 1854 115126
Petrella Tifernina CB 20 1170 116296
Cantalupo nel Sannio IS 20 739 117035
Castelpagano BN 20 1483 118518
Pietracupa CB 20 215 118733

Municipalities with at least 50000 inhabitants

An earthquake occurred to
46 Km N of Benevento (60091 inhabitants)
56 Km NE of Caserta (76326 inhabitants)
65 Km W of San Severo (53905 inhabitants)
68 Km NE of Acerra (59573 inhabitants)
69 Km N of Avellino (54857 inhabitants)
71 Km NE of Aversa (53047 inhabitants)
72 Km NE of Afragola (65057 inhabitants)
74 Km NE of Casoria (77642 inhabitants)
75 Km NE of Giugliano in Campania (122974 inhabitants)
76 Km W of Foggia (151991 inhabitants)
79 Km NE of Marano di Napoli (59874 inhabitants)
81 Km N of Portici (55274 inhabitants)
82 Km NE of Napoli (974074 inhabitants)
83 Km N of Ercolano (53709 inhabitants)
85 Km N of Torre del Greco (86275 inhabitants)
87 Km N of Scafati (50787 inhabitants)
88 Km NE of Pozzuoli (81661 inhabitants)
92 Km N of Cava de' Tirreni (53659 inhabitants)
93 Km N of Castellammare di Stabia (66466 inhabitants)
95 Km N of Salerno (135261 inhabitants)
100 Km SE of Chieti (51815 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

Seismic hazard maps provide probabilistic estimates of the earthquake ground shaking exceeding a given threshold in a given geographic region within a given time window. Thus, it is not a deterministic prediction - a target that may be never reached given the complexity of the earthquake physical phenomenon - nor of the maximum expected earthquake since this has extremely low probabilities to occur.

In 2004, it was published the seismic hazard map of Italy (http://zonesismiche.mi.ingv.it) that provides a picture of the most hazardous geographic regions. The seismic hazard map of Italy (GdL MPS, 2004; rif. Ordinanza PCM del 28 aprile 2006, n. 3519, All. 1b) provides the 10% probability of exceedance in 50 years of the horizontal acceleration at rock sites (i.e., Vs30>800 m/s; cat. A, 3.2.1 of the D.M. 14.09.2005).

The colours indicate the various values of the ground acceleration that have 10% to be exceeded within 50 years. In general, the colours associated to low values of acceleration refer to areas that are less hazardous and stronger earthquakes repeat less frequently although they may still occur.

Seismic hazard map

Seismic hazard map

This map shows the seismic hazard map of Italy for the region where the earthquake occurred.
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		Md 2.6
ML-VAX 1.5 		1999-05-27
10:35:35		 41.524 14.631 12 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 366739
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1999-05-27 10:35:35 ± 0.149
Latitude 41.5240 ± 0.0121
Longitude 14.6310 ± 0.0144
Depth (km) 12 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 366739

Uncertainty

Field Value
Preferred uncertainty description horizontal uncertainty
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) 1799.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 128
Number of associated phases, regardless of their use for origin computation 31
Number of defining phases 31
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00049
Epicentral distance of station farthest from the epicenter (degree) 0.00979
Number of stations at which the event was observed 19
Number of stations from which data was used for origin computation 19
Magnitudes information

Md:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 14
Type of magnitude Md
Reference to an origin 366739
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 22:44:01

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 11
Type of magnitude ML
Reference to an origin 366739
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.FG3.Z. 1999-05-27T10:36:10.10 10.0 undecidable manual SN 78 0.999 0.35 0.4
--.RGNG.Z. 1999-05-27T10:36:01.86 10.0 undecidable manual SG 77 0.7326 0.74 0.3
--.MU9.Z. 1999-05-27T10:35:56.87 10.0 undecidable manual PN 139 0.999 1.53 0
--.SGO.Z. 1999-05-27T10:35:56.73 10.0 undecidable manual PN 151 1.0878 0.13 1
--.FG5.Z. 1999-05-27T10:35:55.71 10.0 undecidable manual SG 116 0.5328 0.86 0.2
--.FG3.Z. 1999-05-27T10:35:54.99 10.0 undecidable manual PN 78 0.999 -0.4 0.9
--.MRB1.Z. 1999-05-27T10:35:52.43 10.0 undecidable manual SG 147 0.4662 -0.47 0.5
--.CI9.Z. 1999-05-27T10:35:51.12 10.0 undecidable manual PG 155 0.7215 0.8 0.6
--.RNI2.Z. 1999-05-27T10:35:50.94 10.0 undecidable manual SG 296 0.3996 0.42 0.6
--.PSB1.Z. 1999-05-27T10:35:49.70 10.0 undecidable manual SG 155 0.3219 0.8 0.3
--.VTB1.Z. 1999-05-27T10:35:49.00 10.0 undecidable manual SG 180 0.333 0.38 0.6
--.SDI.Z. 1999-05-27T10:35:48.27 10.0 undecidable manual PG 287 0.6327 -0.48 1.1
--.RGNG.Z. 1999-05-27T10:35:48.94 10.0 undecidable manual PG 77 0.7326 -1.46 0.1
--.CRVI.Z. 1999-05-27T10:35:48.20 10.0 undecidable manual SG 309 0.3108 0.24 0.7
--.RFI.Z. 1999-05-27T10:35:47.21 10.0 undecidable manual PG 245 0.5328 0.45 1.2
--.FG5.Z. 1999-05-27T10:35:46.55 10.0 undecidable manual PG 116 0.5328 -0.23 1.5
--.MAB1.Z. 1999-05-27T10:35:45.91 10.0 undecidable manual SG 200 0.2775 -0.88 0.2
--.RVI2.Z. 1999-05-27T10:35:45.70 10.0 undecidable manual PG 282 0.4551 -0.46 1.3
--.MRB1.Z. 1999-05-27T10:35:45.33 10.0 undecidable manual PG 147 0.4662 -0.32 1.5
--.RNI2.Z. 1999-05-27T10:35:44.44 10.0 undecidable manual PG 296 0.3996 0.16 1.7
--.PLI2.Z. 1999-05-27T10:35:44.70 10.0 undecidable manual PG 271 0.4218 -0.12 1.7
--.CPI2.Z. 1999-05-27T10:35:44.70 10.0 undecidable manual SG 284 0.2331 -0.76 0.3
--.CRVI.Z. 1999-05-27T10:35:43.19 10.0 undecidable manual PG 309 0.3108 0.49 1.3
--.SMB1.Z. 1999-05-27T10:35:42.55 10.0 undecidable manual SG 152 0.1443 0.1 0.7
--.PSB1.Z. 1999-05-27T10:35:42.50 10.0 undecidable manual PG 155 0.3219 -0.48 1.3
--.VTB1.Z. 1999-05-27T10:35:42.62 10.0 negative manual PG 180 0.333 -0.56 2.3
--.CPI2.Z. 1999-05-27T10:35:41.38 10.0 undecidable manual PG 284 0.2331 0.02 1.8
--.MAB1.Z. 1999-05-27T10:35:41.79 10.0 undecidable manual PG 200 0.2775 -0.34 1.5
--.BAI2.Z. 1999-05-27T10:35:40.91 10.0 undecidable manual SG 255 0.0555 0.61 0.4
--.SMB1.Z. 1999-05-27T10:35:39.30 10.0 undecidable manual PG 152 0.1443 -0.32 1.5
--.BAI2.Z. 1999-05-27T10:35:38.52 10.0 positive manual PG 255 0.0555 0.14 3.4
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, /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