Earthquake with magnitude of Md 2.5 on date 30-04-1987 and time 22:38:08 (UTC) in region 1 km W Brolo (ME)

A magnitude Md 2.5 earthquake occured in region: 1 km W Brolo (ME), on

  • 30-04-1987 22:38:08 (UTC)
  • 01-05-1987 00:38:08 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 38.1560, 14.8210 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
Brolo ME 1 5783 5783
Piraino ME 4 3962 9745
Naso ME 5 3813 13558
Ficarra ME 5 1469 15027
Gioiosa Marea ME 7 7074 22101
Capo d'Orlando ME 7 13254 35355
Sant'Angelo di Brolo ME 7 3090 38445
Castell'Umberto ME 8 3128 41573
Sinagra ME 8 2705 44278
Mirto ME 10 974 45252
San Salvatore di Fitalia ME 10 1319 46571
Capri Leone ME 11 4515 51086
Frazzanò ME 11 711 51797
Montagnareale ME 11 1615 53412
Patti ME 13 13431 66843
Ucria ME 13 1058 67901
Raccuja ME 14 1041 68942
Librizzi ME 14 1660 70602
Tortorici ME 14 6435 77037
San Marco d'Alunzio ME 14 1996 79033
Galati Mamertino ME 14 2627 81660
Torrenova ME 14 4386 86046
Longi ME 15 1473 87519
San Piero Patti ME 17 2915 90434
Militello Rosmarino ME 18 1324 91758
Alcara li Fusi ME 18 1980 93738
Sant'Agata di Militello ME 19 12624 106362

Municipalities with at least 50000 inhabitants

An earthquake occurred to
64 Km W of Messina (238439 inhabitants)
68 Km NW of Acireale (52622 inhabitants)
72 Km W of Reggio di Calabria (183035 inhabitants)
76 Km N of Catania (314555 inhabitants)
99 Km NE 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 2.5 1987-04-30
22:38:08
38.156 14.821 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 46009
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-30 22:38:08 ± 0.61
Latitude 38.1560 ± 0.0510
Longitude 14.8210 ± 0.0363
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 46009

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) 6496.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 194
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.9
Epicentral distance of station closest to the epicenter (degree) 0.00219
Epicentral distance of station farthest from the epicenter (degree) 0.01141
Number of stations at which the event was observed 5
Number of stations from which data was used for origin computation 5
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 46009
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:45:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.MEU.Z. 1987-04-30T22:38:31.00 10.0 undecidable manual PN 179 1.0434 1.67 0.5
--.FAI.Z. 1987-04-30T22:38:31.00 10.0 undecidable manual PN 226 1.2654 -1.41 0.6
--.ATN.Z. 1987-04-30T22:38:27.50 10.0 undecidable manual SG 89 0.4995 0.47 0.7
--.GIB.Z. 1987-04-30T22:38:23.00 10.0 undecidable manual PG 255 0.6327 0.97 1.4
--.MNO.Z. 1987-04-30T22:38:19.00 10.0 undecidable manual SG 204 0.2442 0.32 0.8
--.ATN.Z. 1987-04-30T22:38:18.90 10.0 undecidable manual PG 89 0.4995 -0.48 1.8
--.MNO.Z. 1987-04-30T22:38:13.50 10.0 undecidable manual PG 204 0.2442 -1.06 1.3
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