Earthquake with magnitude of Md 2.3 on date 30-12-1987 and time 16:58:29 (Italy) in region 4 km NW Cagnano Amiterno (AQ)

A magnitude Md 2.3 earthquake occured in region: 4 km NW Cagnano Amiterno (AQ), on

  • 30-12-1987 15:58:29 (UTC)
  • 30-12-1987 16:58:29 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.49, 13.19 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
Cagnano Amiterno AQ 4 1369 1369
Borbona RI 5 617 1986
Montereale AQ 6 2581 4567
Barete AQ 9 737 5304
Posta RI 9 694 5998
Capitignano AQ 10 665 6663
Pizzoli AQ 10 4326 10989
Micigliano RI 12 127 11116
Antrodoco RI 12 2588 13704
Scoppito AQ 14 3727 17431
Borgo Velino RI 14 972 18403
Cittareale RI 15 482 18885
Campotosto AQ 17 542 19427
Castel Sant'Angelo RI 17 1308 20735
Amatrice RI 18 2657 23392

Municipalities with at least 50000 inhabitants

An earthquake occurred to
23 Km NW of L'Aquila (69753 inhabitants)
45 Km E of Terni (111501 inhabitants)
46 Km W of Teramo (54892 inhabitants)
65 Km SE of Foligno (57155 inhabitants)
66 Km NE of Guidonia Montecelio (88673 inhabitants)
67 Km NE of Tivoli (56533 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
82 Km W of Chieti (51815 inhabitants)
84 Km W of Pescara (121014 inhabitants)
88 Km NE of Roma (2864731 inhabitants)
89 Km E of Viterbo (67173 inhabitants)
95 Km SE of Perugia (166134 inhabitants)
95 Km NE of Velletri (53303 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 1987-12-30
15:58:29
42.49 13.19 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 60149
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-12-30 15:58:29 ± 0.287
Latitude 42.49 ± 0.02
Longitude 13.19 ± 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 60149

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) 2898.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 133
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.9
Epicentral distance of station closest to the epicenter (degree) 0.00178
Epicentral distance of station farthest from the epicenter (degree) 0.00923
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

Md:2.3

Field Value
Value 2.3
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 60149
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:57:25
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1987-12-30T15:59:05.00 10.0 undecidable manual SG 350 0.0092 0.29 0.7
--.SDI.Z. 1987-12-30T15:59:02.00 10.0 undecidable manual SG 149 0.0081 1.18 0.4
--.CM8.Z. 1987-12-30T15:58:55.15 10.0 undecidable manual SG 357 0.0063 0.69 0.7
--.ASS.Z. 1987-12-30T15:58:55.00 10.0 undecidable manual SG 325 0.0062 0.86 0.6
--.ARV.Z. 1987-12-30T15:58:49.00 10.0 undecidable manual PG 350 0.0092 -0.98 1.1
--.SDI.Z. 1987-12-30T15:58:48.50 10.0 undecidable manual PG 149 0.0081 0.76 1.4
--.ASS.Z. 1987-12-30T15:58:45.50 10.0 undecidable manual PG 325 0.0062 1.62 0.6
--.MNS.Z. 1987-12-30T15:58:44.00 10.0 undecidable manual SG 254 0.0035 -0.32 0.9
--.CM8.Z. 1987-12-30T15:58:43.80 10.0 undecidable manual PG 357 0.0063 -0.99 1.3
--.MNS.Z. 1987-12-30T15:58:37.50 10.0 undecidable manual PG 254 0.0035 -0.71 1.7
--.AQU.Z. 1987-12-30T15:58:34.00 10.0 undecidable manual PG 130 0.0018 -0.79 1.6
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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