Earthquake with magnitude of Md 2.9 on date 01-03-1985 and time 04:58:37 (Italy) in region 3 km NE Trecastagni (CT)

A magnitude Md 2.9 earthquake occured in region: 3 km NE Trecastagni (CT), on

  • 01-03-1985 03:58:37 (UTC)
  • 01-03-1985 04:58:37 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.64, 15.09 at 10 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
Trecastagni CT 3 10910 10910
Viagrande CT 3 8563 19473
Pedara CT 4 14102 33575
Aci Sant'Antonio CT 5 17984 51559
Aci Bonaccorsi CT 5 3524 55083
Aci Catena CT 6 29851 84934
Zafferana Etnea CT 6 9517 94451
Nicolosi CT 6 7463 101914
Santa Venerina CT 7 8592 110506
San Giovanni la Punta CT 7 23060 133566
Acireale CT 7 52622 186188
Valverde CT 7 7840 194028
Tremestieri Etneo CT 7 20589 214617
Mascalucia CT 8 31958 246575
San Gregorio di Catania CT 9 11966 258541
Sant'Agata li Battiati CT 9 9479 268020
Gravina di Catania CT 9 25838 293858
Milo CT 10 1087 294945
San Pietro Clarenza CT 10 7743 302688
Aci Castello CT 10 18723 321411
Camporotondo Etneo CT 11 5023 326434
Belpasso CT 12 28108 354542
Sant'Alfio CT 12 1582 356124
Giarre CT 13 27659 383783
Ragalna CT 14 3924 387707
Riposto CT 14 14838 402545
Misterbianco CT 15 49410 451955
Catania CT 15 314555 766510
Mascali CT 16 14282 780792
Motta Sant'Anastasia CT 18 12116 792908
Paternò CT 18 48228 841136
Santa Maria di Licodia CT 18 7641 848777
Biancavilla CT 20 24007 872784
Fiumefreddo di Sicilia CT 20 9623 882407

Municipalities with at least 50000 inhabitants

An earthquake occurred to
7 Km W of Acireale (52622 inhabitants)
15 Km N of Catania (314555 inhabitants)
67 Km N of Siracusa (122291 inhabitants)
71 Km SW of Reggio di Calabria (183035 inhabitants)
74 Km SW of Messina (238439 inhabitants)
86 Km NE of Ragusa (73313 inhabitants)
91 Km NE of Vittoria (63339 inhabitants)
92 Km NE of Modica (54633 inhabitants)
92 Km E of Caltanissetta (63360 inhabitants)
98 Km NE of Gela (75827 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours)

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Significant earthquakes since 1000 AD until 2006

Significant earthquakes since 1000 AD until 2006

This map shows the epicenters of the historical earthquakes catalogue CPT11 (Catalogo Parametrico dei Terremoti Italiani, 2011 version) with estimated magnitude ≥ 5.0 since 1000 AD until 2006. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows 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
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 1000 Md 2.9 1985-03-01
03:58:37
37.64 15.09 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 2799
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-03-01 03:58:37 ± 0.412
Latitude 37.64 ± 0.02
Longitude 15.09 ± 0.04
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 2799

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) 4276.9
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 150
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.9
Epicentral distance of station closest to the epicenter (degree) 0.00559
Epicentral distance of station farthest from the epicenter (degree) 0.02364
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

Md:2.9

Field Value
Value 2.9
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 2799
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:07:40
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ORI.Z. 1985-03-01T03:59:21.00 10.0 undecidable manual PN 23 0.0236 1.71 0.8
--.ERC.Z. 1985-03-01T03:59:13.50 10.0 undecidable manual PN! 282 0.0181 2.59 0
--.GIB.Z. 1985-03-01T03:59:10.00 10.0 undecidable manual SG 293 0.0082 1.67 0.4
--.US1.Z. 1985-03-01T03:59:06.50 10.0 undecidable manual PN 306 0.0165 -2.04 0.5
--.PA1.Z. 1985-03-01T03:59:00.00 10.0 undecidable manual SG 193 0.0056 0.8 0.9
--.RCI.Z. 1985-03-01T03:58:59.50 10.0 undecidable manual SG 43 0.0057 0.01 1
--.GIB.Z. 1985-03-01T03:58:55.00 10.0 undecidable manual PG 293 0.0082 -0.16 2.5
--.PA1.Z. 1985-03-01T03:58:49.50 10.0 undecidable manual PG 193 0.0056 -0.39 2.2
--.RCI.Z. 1985-03-01T03:58:49.50 10.0 undecidable manual PG? 43 0.0057 -0.56 0.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol 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