Earthquake with magnitude of Md 1.9 on date 03-04-1987 and time 15:34:14 (UTC) in region 3 km NE Treia (MC)

A magnitude Md 1.9 earthquake occured in region: 3 km NE Treia (MC), on

  • 03-04-1987 15:34:14 (UTC)
  • 03-04-1987 17:34:14 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.33, 13.33 at 15 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
Treia MC 3 9403 9403
Appignano MC 4 4213 13616
Pollenza MC 7 6618 20234
Montecassiano MC 9 7125 27359
Cingoli MC 10 10352 37711
Macerata MC 11 42473 80184
Filottrano AN 12 9499 89683
Montefano MC 13 3541 93224
Tolentino MC 14 20069 113293
Urbisaglia MC 16 2628 115921
Staffolo AN 16 2253 118174
Petriolo MC 17 1998 120172
San Severino Marche MC 17 12726 132898
Corridonia MC 17 15430 148328
Apiro MC 17 2280 150608
Santa Maria Nuova AN 18 4179 154787
San Paolo di Jesi AN 19 933 155720
Colmurano MC 19 1263 156983
Montelupone MC 19 3596 160579
Recanati MC 19 21349 181928
Loro Piceno MC 20 2401 184329
Belforte del Chienti MC 20 1886 186215

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km SW of Ancona (100861 inhabitants)
62 Km SE of Fano (60888 inhabitants)
66 Km NE of Foligno (57155 inhabitants)
73 Km SE of Pesaro (94582 inhabitants)
80 Km E of Perugia (166134 inhabitants)
81 Km NW of Teramo (54892 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 1.9 1987-04-03
15:34:14
43.33 13.33 15 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 44149
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-04-03 15:34:14 ± 0.081
Latitude 43.33 ± 0.00
Longitude 13.33 ± 0.00
Depth (km) 15 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 44149

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) 324.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 182
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
Epicentral distance of station closest to the epicenter (degree) 0.0017
Epicentral distance of station farthest from the epicenter (degree) 0.00291
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:1.9

Field Value
Value 1.9
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 44149
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:43:37
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1987-04-03T15:34:27.00 10.0 undecidable manual SG 300 0.0029 0.05 0.5
--.CM8.Z. 1987-04-03T15:34:22.88 10.0 undecidable manual SG 224 0.0017 -0.05 0.5
--.AM8.Z. 1987-04-03T15:34:21.10 10.0 undecidable manual PG 42 0.0026 -0.01 1.4
--.ARV.Z. 1987-04-03T15:34:21.60 10.0 undecidable manual PG 300 0.0029 -0.04 1.2
--.CM8.Z. 1987-04-03T15:34:19.35 10.0 undecidable manual PG 224 0.0017 0.04 1.4
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