Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.5 on date 17-04-1988 and time 04:37:31 (Italy) in region 7 km W Milo (CT)

A magnitude Md 2.5 earthquake occured in region: 7 km W Milo (CT), on

  • 17-04-1988 02:37:31 (UTC)
  • 17-04-1988 04:37:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.7460, 15.0370 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
Milo CT 7 1087 1087
Zafferana Etnea CT 8 9517 10604
Sant'Alfio CT 10 1582 12186
Santa Venerina CT 11 8592 20778
Giarre CT 13 27659 48437
Mascali CT 14 14282 62719
Linguaglossa CT 14 5403 68122
Piedimonte Etneo CT 14 3963 72085
Pedara CT 14 14102 86187
Nicolosi CT 15 7463 93650
Trecastagni CT 15 10910 104560
Riposto CT 15 14838 119398
Ragalna CT 15 3924 123322
Viagrande CT 16 8563 131885
Fiumefreddo di Sicilia CT 16 9623 141508
Randazzo CT 17 10900 152408
Castiglione di Sicilia CT 17 3215 155623
Moio Alcantara ME 17 717 156340
Aci Sant'Antonio CT 17 17984 174324
Aci Bonaccorsi CT 18 3524 177848
Maletto CT 18 3920 181768
Belpasso CT 18 28108 209876
Aci Catena CT 18 29851 239727
Bronte CT 19 19172 258899
Acireale CT 19 52622 311521
Biancavilla CT 19 24007 335528
Calatabiano CT 19 5308 340836
Tremestieri Etneo CT 19 20589 361425
Mascalucia CT 19 31958 393383
San Pietro Clarenza CT 19 7743 401126
San Giovanni la Punta CT 19 23060 424186
Santa Maria di Licodia CT 19 7641 431827
Malvagna ME 19 733 432560
Francavilla di Sicilia ME 20 3945 436505
Camporotondo Etneo CT 20 5023 441528
Valverde CT 20 7840 449368

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km NW of Acireale (52622 inhabitants)
27 Km N of Catania (314555 inhabitants)
67 Km SW of Reggio di Calabria (183035 inhabitants)
68 Km SW of Messina (238439 inhabitants)
80 Km N of Siracusa (122291 inhabitants)
90 Km E of Caltanissetta (63360 inhabitants)
95 Km N of Ragusa (73313 inhabitants)
99 Km NE of Vittoria (63339 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 1.5 		1988-04-17
02:37:31		 37.746 15.037 5 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 66729
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1988-04-17 02:37:31 ± 0.193
Latitude 37.7460 ± 0.0122
Longitude 15.0370 ± 0.0156
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 66729

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) 1929.0
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.00291
Epicentral distance of station farthest from the epicenter (degree) 0.01060
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 66729
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:03:09

ML:1.5

Field Value
Value 1.5
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 66729
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. 1988-04-17T02:38:01.70 10.0 undecidable manual SG 287 0.8214 0.17 0.6
--.PZI.Z. 1988-04-17T02:37:57.69 10.0 undecidable manual SG 185 0.6882 0.65 0.4
--.FAI.Z. 1988-04-17T02:37:55.68 10.0 undecidable manual PN 246 1.1766 0.69 0.6
--.MEU.Z. 1988-04-17T02:37:54.00 10.0 undecidable manual SG 194 0.6438 -1.81 0
--.ATN.Z. 1988-04-17T02:37:51.50 10.0 undecidable manual SG 38 0.5328 -0.34 0.6
--.GIB.Z. 1988-04-17T02:37:49.50 10.0 undecidable manual PG 287 0.8214 0.49 1.1
--.SOI.Z. 1988-04-17T02:37:49.66 10.0 undecidable manual PG 67 0.8658 0.03 1.6
--.PZI.Z. 1988-04-17T02:37:46.62 10.0 undecidable manual PG 185 0.6882 0.2 1.7
--.MEU.Z. 1988-04-17T02:37:45.51 10.0 undecidable manual PG 194 0.6438 -0.2 1.7
--.MNO.Z. 1988-04-17T02:37:44.20 10.0 undecidable manual SG 304 0.3219 -0.49 0.5
--.ATN.Z. 1988-04-17T02:37:43.45 10.0 undecidable manual PG 38 0.5328 0.04 1.9
--.MNO.Z. 1988-04-17T02:37:38.76 10.0 undecidable manual PG 304 0.3219 -0.53 1.2
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