Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.5 on date 22-07-1988 and time 03:22:11 (UTC) in region 6 km NE Ragalna (CT)

A magnitude Md 2.5 earthquake occured in region: 6 km NE Ragalna (CT), on

  • 22-07-1988 03:22:11 (UTC)
  • 22-07-1988 05:22:11 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6710, 14.9780 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
Ragalna CT 6 3924 3924
Nicolosi CT 8 7463 11387
Belpasso CT 9 28108 39495
Pedara CT 9 14102 53597
Santa Maria di Licodia CT 10 7641 61238
Biancavilla CT 10 24007 85245
Trecastagni CT 11 10910 96155
Zafferana Etnea CT 11 9517 105672
San Pietro Clarenza CT 12 7743 113415
Camporotondo Etneo CT 12 5023 118438
Paternò CT 12 48228 166666
Viagrande CT 12 8563 175229
Mascalucia CT 13 31958 207187
Adrano CT 13 36122 243309
Tremestieri Etneo CT 13 20589 263898
Milo CT 14 1087 264985
Aci Bonaccorsi CT 14 3524 268509
Santa Venerina CT 14 8592 277101
Gravina di Catania CT 14 25838 302939
San Giovanni la Punta CT 15 23060 325999
Aci Sant'Antonio CT 15 17984 343983
Sant'Agata li Battiati CT 15 9479 353462
Aci Catena CT 16 29851 383313
San Gregorio di Catania CT 16 11966 395279
Valverde CT 17 7840 403119
Misterbianco CT 17 49410 452529
Sant'Alfio CT 17 1582 454111
Motta Sant'Anastasia CT 18 12116 466227
Acireale CT 18 52622 518849
Bronte CT 18 19172 538021
Giarre CT 19 27659 565680
Aci Castello CT 20 18723 584403

Municipalities with at least 50000 inhabitants

An earthquake occurred to
18 Km W of Acireale (52622 inhabitants)
21 Km NW of Catania (314555 inhabitants)
73 Km NW of Siracusa (122291 inhabitants)
76 Km SW of Reggio di Calabria (183035 inhabitants)
77 Km SW of Messina (238439 inhabitants)
83 Km E of Caltanissetta (63360 inhabitants)
86 Km N of Ragusa (73313 inhabitants)
89 Km NE of Vittoria (63339 inhabitants)
92 Km N of Modica (54633 inhabitants)
93 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 2.5
ML-VAX 1.7 		1988-07-22
03:22:11		 37.671 14.978 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 73949
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1988-07-22 03:22:11 ± 0.217
Latitude 37.6710 ± 0.0147
Longitude 14.9780 ± 0.0230
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 73949

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) 2598.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 115
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00308
Epicentral distance of station farthest from the epicenter (degree) 0.00850
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 7
Type of magnitude Md
Reference to an origin 73949
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:09:50

ML:1.7

Field Value
Value 1.7
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 73949
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
--.FE2.Z. 1988-07-22T03:22:45.32 10.0 undecidable manual SG 66 0.9435 1.71 0
--.SOI.Z. 1988-07-22T03:22:44.00 10.0 undecidable manual SG 64 0.9324 0.7 0.3
--.GIB.Z. 1988-07-22T03:22:41.00 10.0 undecidable manual SG 293 0.8103 1.68 0
--.MO9.Z. 1988-07-22T03:22:35.33 10.0 undecidable manual SG 59 0.6438 1.18 0.1
--.PZI.Z. 1988-07-22T03:22:34.10 10.0 undecidable manual SG 182 0.6105 1.11 0.1
--.ATN.Z. 1988-07-22T03:22:33.97 10.0 undecidable manual SG 37 0.6105 0.97 0.2
--.MEU.Z. 1988-07-22T03:22:32.28 10.0 undecidable manual SG 191 0.5661 0.78 0.2
--.FE2.Z. 1988-07-22T03:22:29.44 10.0 undecidable manual PG 66 0.9435 -0.48 0.9
--.SOI.Z. 1988-07-22T03:22:28.90 10.0 undecidable manual PG 64 0.9324 -0.84 0.5
--.GIB.Z. 1988-07-22T03:22:27.30 10.0 undecidable manual PG 293 0.8103 -0.14 1.3
--.GA2.Z. 1988-07-22T03:22:27.66 10.0 undecidable manual PG 53 0.8214 -0.15 1.3
--.MO9.Z. 1988-07-22T03:22:24.52 10.0 undecidable manual PG 59 0.6438 0.06 1.4
--.ATN.Z. 1988-07-22T03:22:23.25 10.0 negative manual PG 37 0.6105 -0.55 1.9
--.PZI.Z. 1988-07-22T03:22:23.67 10.0 positive manual PG 182 0.6105 -0.07 2.8
--.MEU.Z. 1988-07-22T03:22:22.64 10.0 positive manual PG 191 0.5661 -0.29 2.5
--.MNO.Z. 1988-07-22T03:22:18.61 10.0 positive manual PG 319 0.3441 -0.1 2.7
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