Earthquake with magnitude of Md 3.7 on date 05-10-1986 and time 11:28:42 (UTC) in region 4 km W Zafferana Etnea (CT)

A magnitude Md 3.7 earthquake occured in region: 4 km W Zafferana Etnea (CT), on

  • 05-10-1986 11:28:42 (UTC)
  • 05-10-1986 12:28:42 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.6910, 15.0600 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
Zafferana Etnea CT 4 9517 9517
Milo CT 6 1087 10604
Santa Venerina CT 7 8592 19196
Pedara CT 8 14102 33298
Trecastagni CT 8 10910 44208
Nicolosi CT 9 7463 51671
Viagrande CT 9 8563 60234
Sant'Alfio CT 10 1582 61816
Aci Sant'Antonio CT 11 17984 79800
Aci Bonaccorsi CT 11 3524 83324
Giarre CT 12 27659 110983
Aci Catena CT 12 29851 140834
Ragalna CT 13 3924 144758
Tremestieri Etneo CT 13 20589 165347
Acireale CT 13 52622 217969
San Giovanni la Punta CT 13 23060 241029
Mascalucia CT 13 31958 272987
Belpasso CT 13 28108 301095
San Pietro Clarenza CT 13 7743 308838
Riposto CT 14 14838 323676
Valverde CT 14 7840 331516
Mascali CT 14 14282 345798
Camporotondo Etneo CT 14 5023 350821
Gravina di Catania CT 14 25838 376659
San Gregorio di Catania CT 15 11966 388625
Sant'Agata li Battiati CT 15 9479 398104
Aci Castello CT 17 18723 416827
Piedimonte Etneo CT 17 3963 420790
Santa Maria di Licodia CT 17 7641 428431
Fiumefreddo di Sicilia CT 17 9623 438054
Biancavilla CT 18 24007 462061
Linguaglossa CT 18 5403 467464
Paternò CT 19 48228 515692
Misterbianco CT 19 49410 565102

Municipalities with at least 50000 inhabitants

An earthquake occurred to
13 Km NW of Acireale (52622 inhabitants)
21 Km N of Catania (314555 inhabitants)
69 Km SW of Reggio di Calabria (183035 inhabitants)
71 Km SW of Messina (238439 inhabitants)
73 Km N of Siracusa (122291 inhabitants)
90 Km NE of Ragusa (73313 inhabitants)
91 Km E of Caltanissetta (63360 inhabitants)
94 Km NE of Vittoria (63339 inhabitants)
96 Km N of Modica (54633 inhabitants)
100 Km NE of Gela (75827 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 3.7 1986-10-05
11:28:42
37.691 15.06 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 35339
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-10-05 11:28:42 ± 0.27
Latitude 37.6910 ± 0.0193
Longitude 15.0600 ± 0.0226
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 35339

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) 2928.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
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) 0.8
Epicentral distance of station closest to the epicenter (degree) 0.00332
Epicentral distance of station farthest from the epicenter (degree) 0.07852
Number of stations at which the event was observed 21
Number of stations from which data was used for origin computation 21
Magnitude information

Md:3.7

Field Value
Value 3.7
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 35339
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:35:44
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.CTI.Z. 1986-10-05T11:30:50.00 10.0 undecidable manual PN 344 8.7135 0.61 0.7
--.ASS.Z. 1986-10-05T11:30:09.00 10.0 undecidable manual PN 341 5.661 1.55 0.3
--.SD1.Z. 1986-10-05T11:29:47.00 10.0 undecidable manual PN 346 4.1292 0.74 1
--.DUI.Z. 1986-10-05T11:29:45.50 10.0 undecidable manual PN 353 3.9849 1.11 0.7
--.SGG.Z. 1986-10-05T11:29:42.40 10.0 undecidable manual PN 351 3.7185 1.61 0.4
--.BAI.Z. 1986-10-05T11:29:39.00 10.0 undecidable manual PN 21 3.6852 -1.26 0.7
--.BRT.Z. 1986-10-05T11:29:38.30 10.0 undecidable manual PN 26 3.5631 -0.25 1.4
--.LCI.Z. 1986-10-05T11:29:37.50 10.0 undecidable manual PN 40 3.5409 -0.8 1.1
--.TR9.Z. 1986-10-05T11:29:36.80 10.0 undecidable manual PN 1 3.3522 1.15 0.8
--.SGO.Z. 1986-10-05T11:29:29.00 10.0 undecidable manual PN 3 2.8638 -0.02 1.6
--.SOR.Z. 1986-10-05T11:29:28.00 10.0 undecidable manual PN 348 2.9415 -1.98 0.2
--.ORI.Z. 1986-10-05T11:29:26.50 10.0 undecidable manual PN 23 2.5863 1.34 0.7
--.MG9.Z. 1986-10-05T11:29:22.50 10.0 undecidable manual PN 8 2.4753 -1.06 1
--.ERC.Z. 1986-10-05T11:29:18.50 10.0 undecidable manual PN? 280 1.9758 1.72 0.2
--.GIB.Z. 1986-10-05T11:29:15.00 10.0 undecidable manual SG 290 0.8658 1.51 0.3
--.CV9.Z. 1986-10-05T11:29:14.00 10.0 undecidable manual PN 270 1.7871 -0.2 1.7
--.GR9.Z. 1986-10-05T11:29:11.00 10.0 undecidable manual PN 43 1.554 0.05 1.7
--.ML9.Z. 1986-10-05T11:29:05.00 10.0 undecidable manual SG 189 0.5883 0.5 0.6
--.SO9.Z. 1986-10-05T11:29:00.30 10.0 undecidable manual PG 63 0.8658 -0.26 1.7
--.GIB.Z. 1986-10-05T11:28:59.50 10.0 undecidable manual PG 290 0.8658 -1 1.1
--.MS9.Z. 1986-10-05T11:28:57.00 10.0 undecidable manual SG 309 0.3663 -0.3 1
--.MSI.Z. 1986-10-05T11:28:56.00 10.0 undecidable manual PG 36 0.6327 -0.33 1.6
--.ML9.Z. 1986-10-05T11:28:55.00 10.0 undecidable manual PG 189 0.5883 -0.3 1.6
--.MS9.Z. 1986-10-05T11:28:50.00 10.0 negative manual PG 309 0.3663 -1.14 1.8
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