Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.3 on date 10-07-1997 and time 17:03:31 (UTC) in region 3 km NE Ragalna (CT)

A magnitude Md 2.3 earthquake occured in region: 3 km NE Ragalna (CT), on

  • 10-07-1997 17:03:31 (UTC)
  • 10-07-1997 19:03:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.6600, 14.9530 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 3 3924 3924
Santa Maria di Licodia CT 7 7641 11565
Biancavilla CT 8 24007 35572
Belpasso CT 8 28108 63680
Nicolosi CT 8 7463 71143
Paternò CT 10 48228 119371
Adrano CT 11 36122 155493
Pedara CT 11 14102 169595
Camporotondo Etneo CT 11 5023 174618
San Pietro Clarenza CT 12 7743 182361
Trecastagni CT 12 10910 193271
Mascalucia CT 13 31958 225229
Viagrande CT 14 8563 233792
Zafferana Etnea CT 14 9517 243309
Tremestieri Etneo CT 14 20589 263898
Gravina di Catania CT 15 25838 289736
Aci Bonaccorsi CT 15 3524 293260
San Giovanni la Punta CT 16 23060 316320
Sant'Agata li Battiati CT 16 9479 325799
Misterbianco CT 16 49410 375209
Milo CT 16 1087 376296
Motta Sant'Anastasia CT 16 12116 388412
Aci Sant'Antonio CT 16 17984 406396
Santa Venerina CT 17 8592 414988
San Gregorio di Catania CT 17 11966 426954
Valverde CT 18 7840 434794
Bronte CT 18 19172 453966
Aci Catena CT 18 29851 483817
Centuripe EN 19 5470 489287
Sant'Alfio CT 19 1582 490869
Acireale CT 20 52622 543491

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km W of Acireale (52622 inhabitants)
21 Km NW of Catania (314555 inhabitants)
73 Km NW of Siracusa (122291 inhabitants)
79 Km SW of Reggio di Calabria (183035 inhabitants)
80 Km SW of Messina (238439 inhabitants)
81 Km E of Caltanissetta (63360 inhabitants)
84 Km N of Ragusa (73313 inhabitants)
87 Km NE of Vittoria (63339 inhabitants)
91 Km N of Modica (54633 inhabitants)
91 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 2.3
ML-VAX 1.8 		1997-07-10
17:03:31		 37.66 14.953 10 2013-07-15
08:41:04		 Bollettino Sismico Italiano INGV 273119
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1997-07-10 17:03:31 ± 0.139
Latitude 37.6600 ± 0.0076
Longitude 14.9530 ± 0.0130
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 273119

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) 1420.8
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
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) 0.00300
Epicentral distance of station farthest from the epicenter (degree) 0.00866
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitudes information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 273119
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 21:18:06

ML:1.8

Field Value
Value 1.8
Uncertainty
Num. used stations 3
Type of magnitude ML
Reference to an origin 273119
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. 1997-07-10T17:04:04.31 10.0 undecidable manual SG 64 0.9657 0.08 0.5
--.MO9.Z. 1997-07-10T17:03:55.15 10.0 undecidable manual SG 59 0.6771 0.07 0.6
--.ATN.Z. 1997-07-10T17:03:54.27 10.0 undecidable manual SG 38 0.6327 0.39 0.4
--.MEU.Z. 1997-07-10T17:03:51.45 10.0 undecidable manual SG 189 0.5439 0.23 0.6
--.SOI.Z. 1997-07-10T17:03:49.90 10.0 undecidable manual PG 64 0.9657 -0.46 0.7
--.AU9.Z. 1997-07-10T17:03:48.59 10.0 undecidable manual SG 152 0.444 0.54 0.3
--.MNO.Z. 1997-07-10T17:03:45.20 10.0 undecidable manual SG 323 0.333 0.76 0.1
--.MO9.Z. 1997-07-10T17:03:45.89 10.0 undecidable manual PG 59 0.6771 0.81 0.3
--.ATN.Z. 1997-07-10T17:03:43.65 10.0 undecidable manual PG 38 0.6327 -0.73 0.4
--.MEU.Z. 1997-07-10T17:03:42.63 10.0 undecidable manual PG 189 0.5439 -0.22 1.5
--.AU9.Z. 1997-07-10T17:03:40.99 10.0 positive manual PG 152 0.444 -0.04 3.3
--.MNO.Z. 1997-07-10T17:03:38.76 10.0 positive manual PG 323 0.333 -0.07 3.3
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