INGVCENTRO​NAZIONALE​TERREMOTI
Sala Sismica

Earthquake with magnitude of Md 2.0 on date 04-05-1985 and time 01:09:05 (Italy) in region 1 km E Montegallo (AP)

A magnitude Md 2.0 earthquake occured in region: 1 km E Montegallo (AP), on

  • 03-05-1985 23:09:05 (UTC)
  • 04-05-1985 01:09:05 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.84, 13.35 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 1 523 523
Montemonaco AP 7 604 1127
Arquata del Tronto AP 9 1178 2305
Acquasanta Terme AP 9 2916 5221
Roccafluvione AP 11 2010 7231
Palmiano AP 11 196 7427
Montefortino FM 11 1178 8605
Venarotta AP 13 2066 10671
Comunanza AP 14 3166 13837
Amandola FM 16 3629 17466
Valle Castellana TE 17 977 18443
Castelsantangelo sul Nera MC 17 281 18724
Force AP 18 1354 20078
Accumoli RI 18 667 20745
Montefalcone Appennino FM 19 424 21169
Ascoli Piceno AP 19 49407 70576
Bolognola MC 20 142 70718
Smerillo FM 20 365 71083

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km NW of Teramo (54892 inhabitants)
54 Km E of Foligno (57155 inhabitants)
55 Km N of L'Aquila (69753 inhabitants)
65 Km E of Terni (111501 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
82 Km NW of Pescara (121014 inhabitants)
84 Km E of Perugia (166134 inhabitants)
86 Km NW of Chieti (51815 inhabitants)
87 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 2.0 1985-05-03
23:09:05
42.84 13.35 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 5849
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-05-03 23:09:05 ± 0.785
Latitude 42.84 ± 0.02
Longitude 13.35 ± 0.08
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 5849

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) 6955.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 250
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
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) 0.0034
Epicentral distance of station farthest from the epicenter (degree) 0.00599
Number of stations at which the event was observed 3
Number of stations from which data was used for origin computation 3
Magnitude information

Md:2

Field Value
Value 2
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 5849
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:10:15
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MNS.Z. 1985-05-03T23:09:20.00 10.0 undecidable manual PG? 227 0.006 0.81 0
--.CM2.Z. 1985-05-03T23:09:20.00 10.0 undecidable manual SG 336 0.0034 0.18 0.8
--.PO9.Z. 1985-05-03T23:09:20.00 10.0 undecidable manual SG 228 0.0036 -0.44 0.3
--.PO9.Z. 1985-05-03T23:09:14.00 10.0 undecidable manual PG 228 0.0036 -0.18 1.4
--.CM2.Z. 1985-05-03T23:09:13.60 10.0 positive manual PG 336 0.0034 -0.23 2.5
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download