Earthquake with magnitude of Md 2.0 on date 25-04-1989 and time 17:41:31 (UTC) in region 2 km W Visso (MC)

A magnitude Md 2.0 earthquake occured in region: 2 km W Visso (MC), on

  • 25-04-1989 17:41:31 (UTC)
  • 25-04-1989 19:41:31 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9280, 13.0710 at 9 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
Visso MC 2 1107 1107
Ussita MC 6 444 1551
Preci PG 6 724 2275
Castelsantangelo sul Nera MC 8 281 2556
Monte Cavallo MC 9 145 2701
Fiordimonte MC 12 202 2903
Sellano PG 12 1079 3982
Pieve Torina MC 13 1458 5440
Fiastra MC 14 559 5999
Acquacanina MC 14 121 6120
Bolognola MC 15 142 6262
Pievebovigliana MC 15 866 7128
Norcia PG 15 4957 12085
Cerreto di Spoleto PG 17 1075 13160
Muccia MC 17 915 14075
Serravalle di Chienti MC 19 1070 15145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
30 Km E of Foligno (57155 inhabitants)
53 Km NE of Terni (111501 inhabitants)
59 Km E of Perugia (166134 inhabitants)
60 Km NW of Teramo (54892 inhabitants)
69 Km NW of L'Aquila (69753 inhabitants)
85 Km SW of Ancona (100861 inhabitants)
97 Km NE of Viterbo (67173 inhabitants)
99 Km W of Montesilvano (53738 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 2.0 1989-04-25
17:41:31
42.928 13.071 9 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 90599
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-04-25 17:41:31 ± 0.287
Latitude 42.9280 ± 0.0124
Longitude 13.0710 ± 0.0174
Depth (km) 9 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 90599

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) 1974.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 181
Number of associated phases, regardless of their use for origin computation 10
Number of defining phases 10
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00121
Epicentral distance of station farthest from the epicenter (degree) 0.00518
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:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 90599
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:24:59
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
--.ARV.Z. 1989-04-25T17:41:53.00 10.0 undecidable manual SG 350 0.5772 0.78 0
--.ALP.Z. 1989-04-25T17:41:46.50 10.0 undecidable manual SG 112 0.3885 0.26 0.6
--.ASS.Z. 1989-04-25T17:41:44.00 10.0 undecidable manual SG 293 0.333 -0.39 0.3
--.ARV.Z. 1989-04-25T17:41:43.00 10.0 undecidable manual PG 350 0.5772 -0.52 0.3
--.CM8.Z. 1989-04-25T17:41:42.30 10.0 undecidable manual SG 11 0.2664 -0.09 0.9
--.ASS.Z. 1989-04-25T17:41:39.50 10.0 undecidable manual PG 293 0.333 0.5 0.4
--.ALP.Z. 1989-04-25T17:41:39.90 10.0 undecidable manual PG 112 0.3885 -0.17 1.2
--.SS8.Z. 1989-04-25T17:41:38.30 10.0 undecidable manual SG 55 0.1332 0.34 0.5
--.CM8.Z. 1989-04-25T17:41:37.80 10.0 undecidable manual PG 11 0.2664 -0.04 2.9
--.SS8.Z. 1989-04-25T17:41:35.20 10.0 undecidable manual PG 55 0.1332 -0.09 2.9
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