Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.4 on date 26-01-1991 and time 13:12:23 (UTC) in region 3 km NW Pedara (CT)

A magnitude Md 2.4 earthquake occured in region: 3 km NW Pedara (CT), on

  • 26-01-1991 13:12:23 (UTC)
  • 26-01-1991 14:12:23 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 37.6450, 15.0440 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.

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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
Pedara CT 3 14102 14102
Nicolosi CT 4 7463 21565
Trecastagni CT 4 10910 32475
Viagrande CT 6 8563 41038
Aci Bonaccorsi CT 8 3524 44562
Zafferana Etnea CT 8 9517 54079
Mascalucia CT 8 31958 86037
Tremestieri Etneo CT 8 20589 106626
San Pietro Clarenza CT 8 7743 114369
Belpasso CT 8 28108 142477
Aci Sant'Antonio CT 8 17984 160461
San Giovanni la Punta CT 9 23060 183521
Camporotondo Etneo CT 9 5023 188544
Ragalna CT 9 3924 192468
Gravina di Catania CT 9 25838 218306
Santa Venerina CT 10 8592 226898
Aci Catena CT 10 29851 256749
Sant'Agata li Battiati CT 10 9479 266228
Valverde CT 10 7840 274068
San Gregorio di Catania CT 11 11966 286034
Milo CT 11 1087 287121
Acireale CT 11 52622 339743
Aci Castello CT 13 18723 358466
Misterbianco CT 14 49410 407876
Santa Maria di Licodia CT 14 7641 415517
Sant'Alfio CT 14 1582 417099
Paternò CT 15 48228 465327
Biancavilla CT 15 24007 489334
Giarre CT 16 27659 516993
Motta Sant'Anastasia CT 16 12116 529109
Catania CT 16 314555 843664
Riposto CT 17 14838 858502
Mascali CT 18 14282 872784
Adrano CT 19 36122 908906

Municipalities with at least 50000 inhabitants

An earthquake occurred to
11 Km W of Acireale (52622 inhabitants)
16 Km N of Catania (314555 inhabitants)
69 Km NW of Siracusa (122291 inhabitants)
74 Km SW of Reggio di Calabria (183035 inhabitants)
76 Km SW of Messina (238439 inhabitants)
85 Km NE of Ragusa (73313 inhabitants)
88 Km E of Caltanissetta (63360 inhabitants)
89 Km NE of Vittoria (63339 inhabitants)
91 Km N of Modica (54633 inhabitants)
95 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 2.4
ML-VAX 1.7 		1991-01-26
13:12:23		 37.645 15.044 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 134989
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-01-26 13:12:23 ± 0.2
Latitude 37.6450 ± 0.0104
Longitude 15.0440 ± 0.0166
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 134989

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) 1863.7
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 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00356
Epicentral distance of station farthest from the epicenter (degree) 0.00809
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitudes information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 134989
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:05:51

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 134989
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
--.GIB.Z. 1991-01-26T13:12:54.00 10.0 undecidable manual SG 293 0.8769 0.77 0.4
--.SOI.Z. 1991-01-26T13:12:54.70 10.0 undecidable manual SG 61 0.8991 -0.17 0.7
--.PZI.Z. 1991-01-26T13:12:44.20 10.0 undecidable manual SG 187 0.5883 -0.07 0.9
--.MEU.Z. 1991-01-26T13:12:43.50 10.0 undecidable manual SG 197 0.555 0.33 0.8
--.SOI.Z. 1991-01-26T13:12:41.58 10.0 undecidable manual PG 61 0.8991 0.43 1.5
--.GIB.Z. 1991-01-26T13:12:41.40 10.0 undecidable manual PG 293 0.8769 0.83 0.9
--.MNO.Z. 1991-01-26T13:12:37.50 10.0 undecidable manual SG 316 0.3996 -0.48 0.7
--.PZI.Z. 1991-01-26T13:12:35.50 10.0 undecidable manual PG 187 0.5883 0.11 2.2
--.MEU.Z. 1991-01-26T13:12:34.20 10.0 undecidable manual PG 197 0.555 -0.56 1.5
--.MNO.Z. 1991-01-26T13:12:30.60 10.0 undecidable manual PG 316 0.3996 -1.16 0.4
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