Earthquake with magnitude of Md 4.0 on date 13-10-1986 and time 05:10:00 (UTC) in region 6 km S Bolognola (MC)

A magnitude Md 4.0 earthquake occured in region: 6 km S Bolognola (MC), on

  • 13-10-1986 05:10:00 (UTC)
  • 13-10-1986 06:10:00 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.9380, 13.2370 at 4 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
Bolognola MC 6 142 142
Ussita MC 8 444 586
Castelsantangelo sul Nera MC 8 281 867
Montemonaco AP 9 604 1471
Montefortino FM 9 1178 2649
Amandola FM 11 3629 6278
Acquacanina MC 12 121 6399
Visso MC 12 1107 7506
Sarnano MC 12 3264 10770
Fiastra MC 13 559 11329
Montegallo AP 13 523 11852
Comunanza AP 15 3166 15018
Fiordimonte MC 16 202 15220
Gualdo MC 17 815 16035
Preci PG 17 724 16759
Pievebovigliana MC 19 866 17625
Palmiano AP 19 196 17821
Smerillo FM 19 365 18186
Arquata del Tronto AP 19 1178 19364
Montefalcone Appennino FM 19 424 19788
Cessapalombo MC 19 512 20300
Pieve Torina MC 19 1458 21758
Monte San Martino MC 20 765 22523
Norcia PG 20 4957 27480

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Foligno (57155 inhabitants)
49 Km NW of Teramo (54892 inhabitants)
64 Km NE of Terni (111501 inhabitants)
67 Km N of L'Aquila (69753 inhabitants)
72 Km E of Perugia (166134 inhabitants)
79 Km SW of Ancona (100861 inhabitants)
88 Km NW of Montesilvano (53738 inhabitants)
96 Km NW of Pescara (121014 inhabitants)
100 Km NW 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 4.0 1986-10-13
05:10:00
42.938 13.237 4 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 35849
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-10-13 05:10:00 ± 0.539
Latitude 42.9380 ± 0.0144
Longitude 13.2370 ± 0.0182
Depth (km) 4 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 35849

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) 2175.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 65
Number of associated phases, regardless of their use for origin computation 66
Number of defining phases 66
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00397
Epicentral distance of station farthest from the epicenter (degree) 0.06387
Number of stations at which the event was observed 62
Number of stations from which data was used for origin computation 62
Magnitude information

Md:4.0

Field Value
Value 4.0
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 35849
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:36:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.VAY.Z. 1986-10-13T05:11:44.30 10.0 undecidable manual PN 99 0.0639 -0.73 0.6
--.MDI.Z. 1986-10-13T05:11:43.00 10.0 undecidable manual SN 319 0.0341 0.11 0.7
--.CDF.Z. 1986-10-13T05:11:41.10 10.0 undecidable manual PN 324 0.0618 -0.8 0.6
--.CTI.Z. 1986-10-13T05:11:31.50 10.0 undecidable manual SN 340 0.0297 0.18 0.8
--.OHR.Z. 1986-10-13T05:11:28.30 10.0 undecidable manual PN 105 0.0531 -0.28 0.9
--.SO9.Z. 1986-10-13T05:11:22.20 10.0 undecidable manual PN 154 0.0478 1.68 0.2
--.LPG.Z. 1986-10-13T05:11:21.00 10.0 undecidable manual PN 300 0.0477 0.66 0.8
--.MUO.Z. 1986-10-13T05:11:20.50 10.0 undecidable manual PN 322 0.0465 1.9 0.1
--.MS9.Z. 1986-10-13T05:11:19.50 10.0 negative manual PN 166 0.0461 1.57 0.5
--.DIX.Z. 1986-10-13T05:11:19.90 10.0 undecidable manual PN 308 0.0468 0.89 0.7
--.RRL.Z. 1986-10-13T05:11:17.50 10.0 undecidable manual PN 294 0.0454 0.64 0.8
--.LLS.Z. 1986-10-13T05:11:17.00 10.0 undecidable manual PN 323 0.0443 1.87 0.1
--.LRG.Z. 1986-10-13T05:11:16.60 10.0 undecidable manual PN 277 0.0452 -0.08 1.1
--.MMK.Z. 1986-10-13T05:11:16.40 10.0 undecidable manual PN 311 0.0439 1.88 0.1
--.PVY.Z. 1986-10-13T05:11:16.00 10.0 undecidable manual PN 91 0.0445 0.45 1
--.IVA.Z. 1986-10-13T05:11:15.30 10.0 undecidable manual PN 88 0.0439 0.81 0.7
--.LMR.Z. 1986-10-13T05:11:14.40 10.0 undecidable manual PN 276 0.0443 -0.71 0.8
--.LSD.Z. 1986-10-13T05:11:14.50 10.0 undecidable manual PN 301 0.0452 -2.13 0.1
--.FRF.Z. 1986-10-13T05:11:13.40 10.0 undecidable manual PN 279 0.0435 -0.55 0.9
--.DA9.Z. 1986-10-13T05:11:11.20 10.0 undecidable manual PN 291 0.0414 0.3 1.1
--.SOO.Z. 1986-10-13T05:11:11.80 10.0 undecidable manual PN 291 0.0423 -0.26 1.1
--.ORX.Z. 1986-10-13T05:11:10.40 10.0 undecidable manual PN 307 0.0416 -0.63 0.9
--.VDL.Z. 1986-10-13T05:11:09.40 10.0 undecidable manual PN 323 0.0399 0.87 0.7
--.OSS.Z. 1986-10-13T05:11:09.10 10.0 undecidable manual PN 330 0.0390 1.96 0.1
--.STV.Z. 1986-10-13T05:11:09.70 10.0 undecidable manual PN 288 0.0402 0.76 0.8
--.TMA.Z. 1986-10-13T05:11:08.40 10.0 undecidable manual PN 316 0.0399 -0.07 1.1
--.TTG.Z. 1986-10-13T05:11:08.20 10.0 undecidable manual PN 94 0.0401 -0.5 1
--.SBF.Z. 1986-10-13T05:11:06.70 10.0 undecidable manual PN 283 0.0388 -0.05 1.2
--.VAI.Z. 1986-10-13T05:11:06.86 10.0 positive manual PN 313 0.0389 -0.11 2.3
--.NKY.Z. 1986-10-13T05:11:05.20 10.0 undecidable manual PN 89 0.0380 -0.3 1.1
--.ROB.Z. 1986-10-13T05:11:04.00 10.0 undecidable manual PN 290 0.0370 -0.01 1.2
--.BDV.Z. 1986-10-13T05:11:04.80 10.0 undecidable manual PN 96 0.0374 0.09 1.2
--.HCY.Z. 1986-10-13T05:11:00.50 10.0 undecidable manual PN 95 0.0351 -0.53 1
--.FIN.Z. 1986-10-13T05:11:00.30 10.0 undecidable manual PN 290 0.0346 -0.18 1.2
--.CKI.Z. 1986-10-13T05:11:00.51 10.0 negative manual PN 293 0.0349 -0.27 2.4
--.BRY.Z. 1986-10-13T05:10:59.80 10.0 undecidable manual PN 88 0.0349 -1.07 0.6
--.ORI.Z. 1986-10-13T05:10:59.83 10.0 negative manual PN 138 0.0338 0.74 1.8
--.MDI.Z. 1986-10-13T05:10:59.45 10.0 positive manual PN 319 0.0341 -0.19 2.4
--.GEN.Z. 1986-10-13T05:10:56.50 10.0 undecidable manual PN 296 0.0309 1.71 0.2
--.BRT.Z. 1986-10-13T05:10:55.38 10.0 positive manual PN 123 0.0321 -1.14 1.2
--.CO9.Z. 1986-10-13T05:10:54.20 10.0 undecidable manual PN 304 0.0295 1.36 0.4
--.CTI.Z. 1986-10-13T05:10:52.66 10.0 undecidable manual PN 340 0.0297 -0.3 1.2
--.SAL.Z. 1986-10-13T05:10:52.84 10.0 negative manual PN 324 0.0296 0.01 2.6
--.FIR.E. 1986-10-13T05:10:52.00 10.0 undecidable manual SN 300 0.0150 -0.27 0.5
--.CVF.Z. 1986-10-13T05:10:51.50 10.0 undecidable manual PN 264 0.0290 -0.34 1.2
--.LJU.Z. 1986-10-13T05:10:51.40 10.0 undecidable manual PN 15 0.0291 -0.6 1
--.BVT.Z. 1986-10-13T05:10:48.60 10.0 undecidable manual PN 302 0.0261 1.11 0.6
--.SGO.Z. 1986-10-13T05:10:46.00 10.0 undecidable manual PN 145 0.0255 -0.48 1.1
--.SOR.Z. 1986-10-13T05:10:42.50 10.0 undecidable manual PN 160 0.0224 0.72 0.9
--.TR9.Z. 1986-10-13T05:10:41.60 10.0 undecidable manual PN 140 0.0216 1.07 0.6
--.BDI.Z. 1986-10-13T05:10:37.20 10.0 positive manual PN 300 0.0199 -0.82 1.7
--.PS9.Z. 1986-10-13T05:10:36.27 10.0 undecidable manual PN 292 0.0190 -0.42 1.2
--.PRO.Z. 1986-10-13T05:10:34.50 10.0 undecidable manual SG 345 0.0091 -1.67 0.1
--.MSC.Z. 1986-10-13T05:10:32.70 10.0 negative manual PN 162 0.0164 0.04 2.6
--.SGG.Z. 1986-10-13T05:10:32.20 10.0 negative manual PN 150 0.0159 0.39 2.4
--.FIR.Z. 1986-10-13T05:10:30.00 10.0 undecidable manual PN 300 0.0150 -0.41 1.2
--.DUI.Z. 1986-10-13T05:10:30.40 10.0 undecidable manual PN 143 0.0141 1 0.7
--.MAO.Z. 1986-10-13T05:10:28.28 10.0 negative manual PN 251 0.0145 -1.47 0.7
--.RMP.Z. 1986-10-13T05:10:23.30 10.0 undecidable manual PN 199 0.0107 -0.64 1
--.SD1.Z. 1986-10-13T05:10:23.53 10.0 undecidable manual PN 160 0.0117 -1.87 0.2
--.CRE.Z. 1986-10-13T05:10:22.65 10.0 positive manual PN 306 0.0104 -0.8 1.8
--.PRO.Z. 1986-10-13T05:10:21.50 10.0 undecidable manual PG 345 0.0091 0.38 1.2
--.AM1.Z. 1986-10-13T05:10:14.20 10.0 undecidable manual PG 22 0.0060 -0.5 1.1
--.ARV.Z. 1986-10-13T05:10:12.93 10.0 positive manual PG 338 0.0053 -0.51 1.1
--.AQU.Z. 1986-10-13T05:10:12.36 10.0 positive manual PG 167 0.0053 -1.02 1.4
--.ASS.Z. 1986-10-13T05:10:10.43 10.0 positive manual PG 286 0.0040 -0.05 1.3
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