Earthquake with magnitude of Md 2.3 on date 18-01-1987 and time 05:32:49 (Italy) in region 2 km NW Barete (AQ)

A magnitude Md 2.3 earthquake occured in region: 2 km NW Barete (AQ), on

  • 18-01-1987 04:32:49 (UTC)
  • 18-01-1987 05:32:49 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.46, 13.27 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
Barete AQ 2 737 737
Cagnano Amiterno AQ 3 1369 2106
Pizzoli AQ 4 4326 6432
Capitignano AQ 7 665 7097
Montereale AQ 7 2581 9678
Scoppito AQ 10 3727 13405
Borbona RI 12 617 14022
Campotosto AQ 14 542 14564
Posta RI 16 694 15258
Antrodoco RI 16 2588 17846
L'Aquila AQ 16 69753 87599
Micigliano RI 17 127 87726
Borgo Velino RI 18 972 88698
Amatrice RI 19 2657 91355
Tornimparte AQ 19 3187 94542
Cittareale RI 19 482 95024
Lucoli AQ 20 1011 96035

Municipalities with at least 50000 inhabitants

An earthquake occurred to
16 Km NW of L'Aquila (69753 inhabitants)
42 Km SW of Teramo (54892 inhabitants)
52 Km E of Terni (111501 inhabitants)
67 Km NE of Tivoli (56533 inhabitants)
68 Km NE of Guidonia Montecelio (88673 inhabitants)
72 Km SE of Foligno (57155 inhabitants)
73 Km W of Montesilvano (53738 inhabitants)
75 Km W of Chieti (51815 inhabitants)
78 Km W of Pescara (121014 inhabitants)
90 Km NE of Roma (2864731 inhabitants)
95 Km NE of Velletri (53303 inhabitants)
95 Km E of Viterbo (67173 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 2.3 1987-01-18
04:32:49
42.46 13.27 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 39429
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-01-18 04:32:49 ± 0.182
Latitude 42.46 ± 0.04
Longitude 13.27 ± 0.07
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 39429

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) 6914
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 186
Number of associated phases, regardless of their use for origin computation 6
Number of defining phases 6
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) 0.0013
Epicentral distance of station farthest from the epicenter (degree) 0.00955
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:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 39429
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:39:29
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1987-01-18T04:33:26.00 10.0 undecidable manual SN 347 0.0096 0.51 0.1
--.ASS.Z. 1987-01-18T04:33:15.50 10.0 undecidable manual SG 323 0.0067 -0.23 0.6
--.ARV.Z. 1987-01-18T04:33:10.00 10.0 undecidable manual PN 347 0.0096 -0.38 0.7
--.ASS.Z. 1987-01-18T04:33:05.00 10.0 undecidable manual PG 323 0.0067 0.25 1.3
--.AQU.Z. 1987-01-18T04:32:56.50 10.0 undecidable manual SG 137 0.0013 0.13 1.2
--.AQU.Z. 1987-01-18T04:32:53.50 10.0 undecidable manual PG 137 0.0013 -0.07 2.1
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