Earthquake with magnitude of Md 2.3 on date 21-08-1991 and time 09:32:08 (Italy) in region 5 km SW Moio Alcantara (ME)

A magnitude Md 2.3 earthquake occured in region: 5 km SW Moio Alcantara (ME), on

  • 21-08-1991 07:32:08 (UTC)
  • 21-08-1991 09:32:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.8630, 15.0240 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.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Moio Alcantara ME 5 717 717
Malvagna ME 7 733 1450
Randazzo CT 7 10900 12350
Roccella Valdemone ME 8 666 13016
Santa Domenica Vittoria ME 8 980 13996
Castiglione di Sicilia CT 9 3215 17211
Francavilla di Sicilia ME 11 3945 21156
Linguaglossa CT 11 5403 26559
Motta Camastra ME 14 845 27404
Maletto CT 14 3920 31324
Piedimonte Etneo CT 15 3963 35287
Sant'Alfio CT 17 1582 36869
Floresta ME 17 485 37354
Gaggi ME 17 3184 40538
Milo CT 17 1087 41625
Montalbano Elicona ME 18 2287 43912
Fiumefreddo di Sicilia CT 18 9623 53535
Graniti ME 18 1492 55027
Calatabiano CT 19 5308 60335
Bronte CT 19 19172 79507
Maniace CT 19 3765 83272
Fondachelli-Fantina ME 19 1019 84291
Mascali CT 19 14282 98573
Novara di Sicilia ME 20 1337 99910
Zafferana Etnea CT 20 9517 109427

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of Acireale (52622 inhabitants)
40 Km N of Catania (314555 inhabitants)
60 Km SW of Messina (238439 inhabitants)
61 Km W of Reggio di Calabria (183035 inhabitants)
92 Km N of Siracusa (122291 inhabitants)
94 Km E of Caltanissetta (63360 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
1991-08-21
07:32:08
37.863 15.024 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 147909
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-08-21 07:32:08 ± 0.207
Latitude 37.8630 ± 0.0144
Longitude 15.0240 ± 0.0160
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 147909

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) 2127.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 109
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) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00235
Epicentral distance of station farthest from the epicenter (degree) 0.00753
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitudes information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 147909
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:18:02

ML:1.8

Field Value
Value 1.8
Uncertainty
Num. used stations 5
Type of magnitude ML
Reference to an origin 147909
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. 1991-08-21T07:32:38.24 10.0 undecidable manual SG 74 0.8325 1.04 0.2
--.GIB.Z. 1991-08-21T07:32:36.35 10.0 undecidable manual SG 279 0.7881 0.49 0.5
--.PZI.Z. 1991-08-21T07:32:36.00 10.0 undecidable manual SG 184 0.8103 -0.27 0.6
--.MEU.Z. 1991-08-21T07:32:35.46 10.0 undecidable manual SG 191 0.7659 0.54 0.5
--.SA1.Z. 1991-08-21T07:32:33.27 10.0 undecidable manual SG 347 0.7104 0.03 0.7
--.MO9.Z. 1991-08-21T07:32:26.00 10.0 undecidable manual SG 74 0.5439 -1.8 0
--.SOI.Z. 1991-08-21T07:32:25.18 10.0 positive manual PG 74 0.8325 0.16 3
--.ATN.Z. 1991-08-21T07:32:25.25 10.0 undecidable manual SG 49 0.444 0.39 0.6
--.PZI.Z. 1991-08-21T07:32:24.00 10.0 undecidable manual PG 184 0.8103 -0.48 1.3
--.MEU.Z. 1991-08-21T07:32:23.30 10.0 undecidable manual PG 191 0.7659 -0.4 1.4
--.GIB.Z. 1991-08-21T07:32:23.81 10.0 undecidable manual PG 279 0.7881 -0.43 1.3
--.SA1.Z. 1991-08-21T07:32:21.10 10.0 undecidable manual PG 347 0.7104 -1.72 0.1
--.MNO.Z. 1991-08-21T07:32:20.20 10.0 undecidable manual SG 284 0.2553 1.09 0.2
--.MO9.Z. 1991-08-21T07:32:20.50 10.0 undecidable manual PG 74 0.5439 0.91 0.8
--.ATN.Z. 1991-08-21T07:32:18.19 10.0 undecidable manual PG 49 0.444 0.3 1.6
--.MNO.Z. 1991-08-21T07:32:14.92 10.0 negative manual PG 284 0.2553 0.45 2.9
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
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