Earthquake with magnitude of Md 2.5 on date 12-02-1987 and time 14:55:10 (Italy) in region 2 km N Cagnano Amiterno (AQ)

A magnitude Md 2.5 earthquake occured in region: 2 km N Cagnano Amiterno (AQ), on

  • 12-02-1987 13:55:10 (UTC)
  • 12-02-1987 14:55:10 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.48, 13.23 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 2 1369 1369
Barete AQ 5 737 2106
Montereale AQ 6 2581 4687
Pizzoli AQ 7 4326 9013
Capitignano AQ 8 665 9678
Borbona RI 9 617 10295
Scoppito AQ 12 3727 14022
Posta RI 12 694 14716
Antrodoco RI 14 2588 17304
Micigliano RI 15 127 17431
Campotosto AQ 15 542 17973
Borgo Velino RI 16 972 18945
Cittareale RI 17 482 19427
Amatrice RI 18 2657 22084
Castel Sant'Angelo RI 19 1308 23392
L'Aquila AQ 20 69753 93145

Municipalities with at least 50000 inhabitants

An earthquake occurred to
20 Km NW of L'Aquila (69753 inhabitants)
44 Km W of Teramo (54892 inhabitants)
49 Km E of Terni (111501 inhabitants)
67 Km NE of Guidonia Montecelio (88673 inhabitants)
67 Km NE of Tivoli (56533 inhabitants)
68 Km SE of Foligno (57155 inhabitants)
76 Km W of Montesilvano (53738 inhabitants)
78 Km W of Chieti (51815 inhabitants)
81 Km W of Pescara (121014 inhabitants)
89 Km NE of Roma (2864731 inhabitants)
92 Km E of Viterbo (67173 inhabitants)
95 Km NE of Velletri (53303 inhabitants)
98 Km SE of Perugia (166134 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 1987-02-12
13:55:10
42.48 13.23 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 41179
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-02-12 13:55:10 ± 1.112
Latitude 42.48 ± 0.02
Longitude 13.23 ± 0.03
Depth (km) 10 ± 9 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 41179

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) 3902.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 190
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) 0.5
Epicentral distance of station closest to the epicenter (degree) 0.00154
Epicentral distance of station farthest from the epicenter (degree) 0.00931
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 41179
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:41:01
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1987-02-12T13:55:47.50 10.0 undecidable manual SN 348 0.0093 1.45 0.1
--.ASS.Z. 1987-02-12T13:55:35.00 10.0 undecidable manual SG 324 0.0065 -0.88 0.3
--.ARV.Z. 1987-02-12T13:55:31.00 10.0 undecidable manual PN 348 0.0093 -0.14 1.3
--.ALP.Z. 1987-02-12T13:55:25.54 10.0 undecidable manual SG 39 0.0035 0.26 1
--.ASS.Z. 1987-02-12T13:55:25.50 10.0 undecidable manual PG 324 0.0065 0.23 1.5
--.AQU.Z. 1987-02-12T13:55:19.50 10.0 undecidable manual SG 133 0.0015 1.12 0.2
--.ALP.Z. 1987-02-12T13:55:18.33 10.0 positive manual PG 39 0.0035 -0.82 1.9
--.AQU.Z. 1987-02-12T13:55:15.00 10.0 undecidable manual PG 133 0.0015 -0.16 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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