Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.8 on date 22-04-1989 and time 21:22:27 (UTC) in region 2 km E Castelbuono (PA)

A magnitude Md 2.8 earthquake occured in region: 2 km E Castelbuono (PA), on

  • 22-04-1989 21:22:27 (UTC)
  • 22-04-1989 23:22:27 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.93, 14.12 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
Castelbuono PA 2 8943 8943
San Mauro Castelverde PA 7 1701 10644
Pollina PA 8 2974 13618
Geraci Siculo PA 8 1945 15563
Isnello PA 10 1589 17152
Tusa ME 13 2925 20077
Gratteri PA 13 963 21040
Petralia Sottana PA 14 2821 23861
Petralia Soprana PA 15 3360 27221
Cefalù PA 15 14393 41614
Collesano PA 16 4054 45668
Pettineo ME 16 1350 47018
Polizzi Generosa PA 16 3407 50425
Gangi PA 16 6811 57236
Lascari PA 17 3588 60824
Castellana Sicula PA 17 3411 64235
Motta d'Affermo ME 18 739 64974
Castel di Lucio ME 18 1294 66268
Blufi PA 20 1029 67297
Scillato PA 20 613 67910
Bompietro PA 20 1401 69311

Municipalities with at least 50000 inhabitants

An earthquake occurred to
49 Km N of Caltanissetta (63360 inhabitants)
56 Km E of Bagheria (55387 inhabitants)
69 Km E of Palermo (674435 inhabitants)
83 Km NE of Agrigento (59770 inhabitants)
97 Km N of Gela (75827 inhabitants)
98 Km NW of Catania (314555 inhabitants)
99 Km W of Acireale (52622 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 2.8
ML-VAX 2.1 		1989-04-22
21:22:27		 37.93 14.12 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 90359
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-04-22 21:22:27 ± 0.195
Latitude 37.93 ± 0.02
Longitude 14.12 ± 0.02
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 90359

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) 2483.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 87
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 22
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) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.02226
Number of stations at which the event was observed 15
Number of stations from which data was used for origin computation 15
Magnitudes information

Md:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 7
Type of magnitude Md
Reference to an origin 90359
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:24:46

ML:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 4
Type of magnitude ML
Reference to an origin 90359
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 Takeoff_angle Residual Weight
--.SOI.Z. 1989-04-22T21:23:15.93 10.0 undecidable manual SN 83 0.0138 0.12 0.4
--.MO9.Z. 1989-04-22T21:23:09.30 10.0 undecidable manual SN 86 0.0112 0.07 0.5
--.MGR.Z. 1989-04-22T21:23:07.54 10.0 undecidable manual PN 26 0.0223 -0.76 0.5
--.PZI.Z. 1989-04-22T21:23:04.77 10.0 undecidable manual SN 142 0.0098 -0.56 0.4
--.MEU.Z. 1989-04-22T21:23:03.63 10.0 undecidable manual SG 144 0.0089 1.36 0.1
--.RI2.Z. 1989-04-22T21:23:01.86 10.0 undecidable manual PN 74 0.0172 1.11 0.4
--.CZI.Z. 1989-04-22T21:23:00.86 10.0 undecidable manual PN 50 0.0183 -1.43 0.2
--.FE2.Z. 1989-04-22T21:22:58.24 10.0 undecidable manual PN 85 0.014 2.54 0
--.SOI.Z. 1989-04-22T21:22:56.45 10.0 positive manual PN 83 0.0138 1.06 1
--.MO9.Z. 1989-04-22T21:22:51.75 10.0 negative manual PN 86 0.0112 0.31 2.2
--.ERC.Z. 1989-04-22T21:22:51.31 10.0 undecidable manual PN 275 0.0108 0.39 1.1
--.CVT.Z. 1989-04-22T21:22:49.50 10.0 undecidable manual PG 256 0.0096 -0.02 1.3
--.ATN.Z. 1989-04-22T21:22:48.39 10.0 negative manual PN 77 0.0097 -0.84 1.6
--.PZI.Z. 1989-04-22T21:22:48.67 10.0 undecidable manual PN 142 0.0098 -0.67 0.9
--.MEU.Z. 1989-04-22T21:22:46.96 10.0 positive manual PG 144 0.0089 -0.61 2
--.MNO.Z. 1989-04-22T21:22:45.33 10.0 undecidable manual SG 89 0.004 0.3 0.5
--.MCT.Z. 1989-04-22T21:22:45.97 10.0 undecidable manual SG 232 0.0045 -0.63 0.4
--.LPI.Z. 1989-04-22T21:22:44.37 10.0 negative manual PG 48 0.0076 -0.58 2
--.MCT.Z. 1989-04-22T21:22:38.56 10.0 undecidable manual PG 232 0.0045 0.04 1.3
--.MNO.Z. 1989-04-22T21:22:37.28 10.0 positive manual PG 89 0.004 -0.34 2.4
--.GIB.Z. 1989-04-22T21:22:32.70 10.0 undecidable manual SG 311 0.0008 0.61 0.4
--.GIB.Z. 1989-04-22T21:22:29.92 10.0 negative manual PG 311 0.0008 0.14 2.5
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download