Earthquake with magnitude of Md 2.9 on date 01-03-1985 and time 03:58:37 (UTC) 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) 37.641, 15.093 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 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.
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
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000
Md 2.9 1985-03-01
03:58:37
37.641 15.093 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 37.6410 ± 0.0238
Longitude 15.0930 ± 0.0381
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
--.RCI.Z. 1985-03-01T03:58:49.50 10.0 undecidable manual PG? 43 0.0057 -0.56 0.8
--.PA1.Z. 1985-03-01T03:58:49.50 10.0 undecidable manual PG 193 0.0056 -0.39 2.2
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