Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.2 on date 21-02-1989 and time 15:11:04 (UTC) in region 4 km N Nicolosi (CT)

A magnitude Md 2.2 earthquake occured in region: 4 km N Nicolosi (CT), on

  • 21-02-1989 15:11:04 (UTC)
  • 21-02-1989 16:11:04 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.6480, 15.0190 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.

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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
Nicolosi CT 4 7463 7463
Pedara CT 5 14102 21565
Trecastagni CT 6 10910 32475
Ragalna CT 7 3924 36399
Belpasso CT 7 28108 64507
Viagrande CT 8 8563 73070
San Pietro Clarenza CT 8 7743 80813
Mascalucia CT 9 31958 112771
Camporotondo Etneo CT 9 5023 117794
Tremestieri Etneo CT 9 20589 138383
Zafferana Etnea CT 9 9517 147900
Aci Bonaccorsi CT 10 3524 151424
San Giovanni la Punta CT 10 23060 174484
Gravina di Catania CT 10 25838 200322
Aci Sant'Antonio CT 11 17984 218306
Sant'Agata li Battiati CT 11 9479 227785
Santa Venerina CT 12 8592 236377
Valverde CT 12 7840 244217
Santa Maria di Licodia CT 12 7641 251858
Aci Catena CT 12 29851 281709
Milo CT 12 1087 282796
San Gregorio di Catania CT 12 11966 294762
Paternò CT 13 48228 342990
Biancavilla CT 13 24007 366997
Acireale CT 14 52622 419619
Misterbianco CT 14 49410 469029
Aci Castello CT 15 18723 487752
Sant'Alfio CT 16 1582 489334
Motta Sant'Anastasia CT 16 12116 501450
Adrano CT 16 36122 537572
Catania CT 17 314555 852127
Giarre CT 17 27659 879786
Riposto CT 19 14838 894624
Mascali CT 20 14282 908906

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km W of Acireale (52622 inhabitants)
17 Km NW of Catania (314555 inhabitants)
70 Km NW of Siracusa (122291 inhabitants)
75 Km SW of Reggio di Calabria (183035 inhabitants)
77 Km SW of Messina (238439 inhabitants)
84 Km N of Ragusa (73313 inhabitants)
86 Km E of Caltanissetta (63360 inhabitants)
89 Km NE of Vittoria (63339 inhabitants)
91 Km N of Modica (54633 inhabitants)
94 Km NE of Gela (75827 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Bulletin
Rev1000 		Md 2.2
ML-VAX 1.6 		1989-02-21
15:11:04		 37.648 15.019 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 87419
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-02-21 15:11:04 ± 0.15
Latitude 37.6480 ± 0.0078
Longitude 15.0190 ± 0.0137
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 87419

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) 1483.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 132
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00340
Epicentral distance of station farthest from the epicenter (degree) 0.00826
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 87419
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:22:02

ML:1.6

Field Value
Value 1.6
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 87419
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.SOI.Z. 1989-02-21T15:11:36.86 10.0 undecidable manual SG 61 0.9213 0.29 0.5
--.ATN.Z. 1989-02-21T15:11:27.00 10.0 undecidable manual SG 34 0.6105 0.15 0.8
--.PZI.Z. 1989-02-21T15:11:26.90 10.0 undecidable manual SG 185 0.5883 0 0.8
--.SOI.Z. 1989-02-21T15:11:23.40 10.0 undecidable manual PG 61 0.9213 0.18 1.5
--.MNO.Z. 1989-02-21T15:11:19.76 10.0 undecidable manual SG 317 0.3774 0.77 0.2
--.ATN.Z. 1989-02-21T15:11:16.50 10.0 undecidable manual PG 34 0.6105 -0.75 0.4
--.PZI.Z. 1989-02-21T15:11:16.81 10.0 undecidable manual PG 185 0.5883 0 2.1
--.MNO.Z. 1989-02-21T15:11:12.42 10.0 undecidable manual PG 317 0.3774 -0.29 1.6
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download