Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 4.1 on date 01-10-1986 and time 20:53:39 (Italy) in region SE Comano (MS)

A magnitude Md 4.1 earthquake occured in region: SE Comano (MS), on

  • 01-10-1986 19:53:39 (UTC)
  • 01-10-1986 20:53:39 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 44.2970, 10.1370 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.

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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
Comano MS 0 714 714
Fivizzano MS 7 7925 8639
Licciana Nardi MS 9 4949 13588
Casola in Lunigiana MS 11 988 14576
Bagnone MS 12 1887 16463
Monchio delle Corti PR 13 933 17396
Villafranca in Lunigiana MS 15 4770 22166
Minucciano LU 15 2102 24268
Sillano Giuncugnano LU 15 1085 25353
Tresana MS 16 2044 27397
Palanzano PR 16 1142 28539
Filattiera MS 16 2309 30848
Aulla MS 17 11263 42111
Ventasso RE 17 4295 46406
Piazza al Serchio LU 18 2367 48773
Mulazzo MS 18 2424 51197
Podenzana MS 18 2180 53377

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km N of Carrara (63133 inhabitants)
29 Km N of Massa (69479 inhabitants)
32 Km NE of La Spezia (93959 inhabitants)
49 Km N of Viareggio (62467 inhabitants)
58 Km NW of Lucca (89046 inhabitants)
58 Km S of Parma (192836 inhabitants)
59 Km SW of Reggio nell'Emilia (171345 inhabitants)
68 Km NW of Pisa (89158 inhabitants)
74 Km SW of Modena (184973 inhabitants)
74 Km NW of Pistoia (90315 inhabitants)
80 Km SW of Carpi (70699 inhabitants)
84 Km N of Livorno (159219 inhabitants)
90 Km NW of Prato (191150 inhabitants)
91 Km SE of Piacenza (102191 inhabitants)
94 Km S of Cremona (71901 inhabitants)
97 Km E of Genova (586655 inhabitants)
98 Km W of Bologna (386663 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 4.1 1986-10-01
19:53:39		 44.297 10.137 4 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 34969
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-10-01 19:53:39 ± 0.386
Latitude 44.2970 ± 0.0149
Longitude 10.1370 ± 0.0166
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 34969

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) 2123.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 99
Number of associated phases, regardless of their use for origin computation 52
Number of defining phases 52
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) 0.00259
Epicentral distance of station farthest from the epicenter (degree) 0.08621
Number of stations at which the event was observed 49
Number of stations from which data was used for origin computation 49
Magnitude information

Md:4.1

Field Value
Value 4.1
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 34969
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:35:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.VAY.Z. 1986-10-01T19:55:59.00 10.0 undecidable manual PN 103 0.0862 0.45 0.5
--.SKO.Z. 1986-10-01T19:55:46.00 10.0 undecidable manual PN 101 0.0770 1.48 0.1
--.TTG.Z. 1986-10-01T19:55:23.50 10.0 undecidable manual PN 102 0.0619 1.98 0
--.PLE.Z. 1986-10-01T19:55:21.60 10.0 undecidable manual PN 94 0.0606 2.02 0
--.BDV.Z. 1986-10-01T19:55:19.00 10.0 undecidable manual PN 104 0.0597 0.93 0.4
--.BAI.Z. 1986-10-01T19:55:08.00 10.0 undecidable manual PN 120 0.0529 0.14 0.8
--.MS1.Z. 1986-10-01T19:54:56.00 10.0 undecidable manual PN 119 0.0447 0.74 0.6
--.SOR.Z. 1986-10-01T19:54:54.30 10.0 undecidable manual PN 138 0.0435 0.9 0.5
--.ZAG.Z. 1986-10-01T19:54:47.50 10.0 undecidable manual PN 67 0.0397 -0.03 1
--.MSC.Z. 1986-10-01T19:54:45.70 10.0 undecidable manual PN 136 0.0376 1.16 0.4
--.ROF.Z. 1986-10-01T19:54:43.50 10.0 undecidable manual PN 327 0.0365 0.75 0.7
--.DA9.Z. 1986-10-01T19:54:41.00 10.0 undecidable manual SN 276 0.0186 -0.52 0.6
--.LJU.Z. 1986-10-01T19:54:35.50 10.0 undecidable manual PN 58 0.0319 -0.27 1
--.CEY.Z. 1986-10-01T19:54:31.90 10.0 undecidable manual PN 62 0.0302 -1.18 0.4
--.RBL.Z. 1986-10-01T19:54:30.27 10.0 negative manual PN 46 0.0290 -1 1.1
--.RMP.Z. 1986-10-01T19:54:30.78 10.0 undecidable manual PN? 141 0.0280 1.04 0.2
--.VOY.Z. 1986-10-01T19:54:29.70 10.0 undecidable manual PN 55 0.0284 -0.75 0.8
--.TRI.Z. 1986-10-01T19:54:26.40 10.0 negative manual PN 59 0.0263 -1.14 0.9
--.BN9.Z. 1986-10-01T19:54:23.42 10.0 undecidable manual PN 288 0.0231 1.1 0.5
--.CKI.Z. 1986-10-01T19:54:22.00 10.0 undecidable manual SN 275 0.0120 -1.89 0.1
--.RRL.Z. 1986-10-01T19:54:21.80 10.0 undecidable manual PN 285 0.0222 0.93 0.7
--.OSS.Z. 1986-10-01T19:54:20.90 10.0 undecidable manual PN 359 0.0215 1.09 0.5
--.LSD.Z. 1986-10-01T19:54:20.60 10.0 undecidable manual PN 299 0.0216 0.52 1
--.MMK.Z. 1986-10-01T19:54:20.50 10.0 undecidable manual PN 319 0.0209 1.53 0.2
--.VDL.Z. 1986-10-01T19:54:18.50 10.0 undecidable manual PN 347 0.0201 0.77 0.8
--.GAI.Z. 1986-10-01T19:54:17.30 10.0 undecidable manual PN 291 0.0190 1.22 0.4
--.ARV.Z. 1986-10-01T19:54:17.23 10.0 undecidable manual PN 110 0.0195 0.38 1.1
--.SOO.Z. 1986-10-01T19:54:16.40 10.0 undecidable manual PN 276 0.0196 -0.52 1
--.DA9.Z. 1986-10-01T19:54:15.80 10.0 positive manual PN 276 0.0186 0.29 2.3
--.ORO.Z. 1986-10-01T19:54:15.56 10.0 negative manual PN 311 0.0181 0.77 0.8
--.ORX.Z. 1986-10-01T19:54:15.20 10.0 undecidable manual PN 311 0.0182 0.38 1.1
--.MAO.Z. 1986-10-01T19:54:14.50 10.0 negative manual PN 157 0.0181 -0.24 2.4
--.STV.Z. 1986-10-01T19:54:14.40 10.0 undecidable manual PN 269 0.0181 -0.2 1.2
--.CTI.Z. 1986-10-01T19:54:14.27 10.0 positive manual PN 30 0.0184 -0.88 1.4
--.PRO.Z. 1986-10-01T19:54:13.90 10.0 undecidable manual PN 99 0.0181 -0.66 0.9
--.ENR.Z. 1986-10-01T19:54:13.60 10.0 undecidable manual PN 268 0.0175 -0.13 1.2
--.VAI.Z. 1986-10-01T19:54:12.69 10.0 negative manual PN 328 0.0165 0.39 2.2
--.FIR.N. 1986-10-01T19:54:12.00 10.0 undecidable manual SG 122 0.0086 -1.87 0
--.IMP.Z. 1986-10-01T19:54:08.80 10.0 undecidable manual PN 257 0.0148 -0.94 0.7
--.ROB.Z. 1986-10-01T19:54:08.20 10.0 undecidable manual PN 270 0.0146 -1.05 0.6
--.MDI.Z. 1986-10-01T19:54:07.69 10.0 positive manual PN 348 0.0135 -0.05 2.5
--.CRE.Z. 1986-10-01T19:54:06.57 10.0 negative manual PN 116 0.0132 -0.63 1.9
--.FIN.Z. 1986-10-01T19:54:05.10 10.0 undecidable manual PN 266 0.0124 -0.91 0.7
--.SAL.Z. 1986-10-01T19:54:05.40 10.0 negative manual PN 11 0.0120 0.01 2.5
--.CKI.Z. 1986-10-01T19:54:04.59 10.0 positive manual PN 275 0.0120 -0.73 1.7
--.FIR.Z. 1986-10-01T19:53:59.00 10.0 undecidable manual PG 122 0.0086 -0.54 1
--.GEN.Z. 1986-10-01T19:53:57.70 10.0 undecidable manual PG 278 0.0078 -0.1 1.2
--.VEA.Z. 1986-10-01T19:53:54.40 10.0 undecidable manual PG 328 0.0062 -0.3 1.2
--.CO9.Z. 1986-10-01T19:53:54.00 10.0 positive manual PG 313 0.0061 -0.37 2.3
--.PS9.Z. 1986-10-01T19:53:53.30 10.0 negative manual PG 153 0.0057 -0.33 2.3
--.BDI.Z. 1986-10-01T19:53:48.74 10.0 positive manual PG 125 0.0036 -0.26 2.4
--.BVT.Z. 1986-10-01T19:53:46.40 10.0 undecidable manual PG 307 0.0026 -0.05 1.2
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