Earthquake with magnitude of Md 2.5 on date 17-09-1989 and time 00:08:41 (Italy) in region 5 km SW Montegallo (AP)

A magnitude Md 2.5 earthquake occured in region: 5 km SW Montegallo (AP), on

  • 16-09-1989 22:08:41 (UTC)
  • 17-09-1989 00:08:41 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.82, 13.29 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
Montegallo AP 5 523 523
Arquata del Tronto AP 5 1178 1701
Montemonaco AP 10 604 2305
Acquasanta Terme AP 11 2916 5221
Accumoli RI 14 667 5888
Castelsantangelo sul Nera MC 14 281 6169
Montefortino FM 15 1178 7347
Roccafluvione AP 16 2010 9357
Norcia PG 16 4957 14314
Palmiano AP 17 196 14510
Venarotta AP 18 2066 16576
Ussita MC 19 444 17020
Comunanza AP 19 3166 20186
Amandola FM 19 3629 23815
Valle Castellana TE 19 977 24792

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km W of Teramo (54892 inhabitants)
50 Km E of Foligno (57155 inhabitants)
53 Km N of L'Aquila (69753 inhabitants)
60 Km E of Terni (111501 inhabitants)
78 Km W of Montesilvano (53738 inhabitants)
80 Km E of Perugia (166134 inhabitants)
85 Km W of Pescara (121014 inhabitants)
89 Km NW of Chieti (51815 inhabitants)
91 Km S of Ancona (100861 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
Rev 1000 Md 2.5
ML-VAX 1.9
1989-09-16
22:08:41
42.82 13.29 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 99539
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-09-16 22:08:41 ± 0.312
Latitude 42.82 ± 0.02
Longitude 13.29 ± 0.03
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 99539

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) 3190.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 126
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.00186
Epicentral distance of station farthest from the epicenter (degree) 0.00648
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 99539
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:32:59

ML:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 1
Type of magnitude ML
Reference to an origin 99539
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 Takeoff_angle Residual Weight
--.ARV.Z. 1989-09-16T22:09:07.00 10.0 undecidable manual SG 340 0.0065 0.34 0.7
--.MNS.Z. 1989-09-16T22:09:04.00 10.0 undecidable manual SG 226 0.0056 0.72 0.5
--.ASS.Z. 1989-09-16T22:09:02.00 10.0 undecidable manual SG 298 0.0047 1.78 0
--.ARV.Z. 1989-09-16T22:08:55.50 10.0 undecidable manual PG 340 0.0065 -0.49 1.5
--.MNS.Z. 1989-09-16T22:08:53.50 10.0 undecidable manual PG 226 0.0056 -0.55 1.5
--.ASS.Z. 1989-09-16T22:08:51.50 10.0 undecidable manual PG 298 0.0047 -0.77 1.3
--.ALP.Z. 1989-09-16T22:08:51.40 10.0 undecidable manual SG 100 0.0019 1.01 0.4
--.ALP.Z. 1989-09-16T22:08:46.26 10.0 undecidable manual PG 100 0.0019 -0.13 2.2
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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