Earthquake with magnitude of Md 2.4 on date 30-12-1987 and time 18:57:59 (Italy) in region NE Cagnano Amiterno (AQ)

A magnitude Md 2.4 earthquake occured in region: NE Cagnano Amiterno (AQ), on

  • 30-12-1987 17:57:59 (UTC)
  • 30-12-1987 18:57:59 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.46, 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 0 1369 1369
Barete AQ 5 737 2106
Pizzoli AQ 6 4326 6432
Montereale AQ 7 2581 9013
Capitignano AQ 9 665 9678
Borbona RI 10 617 10295
Scoppito AQ 10 3727 14022
Posta RI 13 694 14716
Antrodoco RI 13 2588 17304
Micigliano RI 14 127 17431
Borgo Velino RI 15 972 18403
Campotosto AQ 16 542 18945
Castel Sant'Angelo RI 18 1308 20253
Cittareale RI 18 482 20735
L'Aquila AQ 19 69753 90488
Amatrice RI 19 2657 93145
Tornimparte AQ 20 3187 96332

Municipalities with at least 50000 inhabitants

An earthquake occurred to
19 Km NW of L'Aquila (69753 inhabitants)
45 Km SW of Teramo (54892 inhabitants)
49 Km E of Terni (111501 inhabitants)
66 Km NE of Tivoli (56533 inhabitants)
66 Km NE of Guidonia Montecelio (88673 inhabitants)
70 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)
88 Km NE of Roma (2864731 inhabitants)
92 Km E of Viterbo (67173 inhabitants)
94 Km NE of Velletri (53303 inhabitants)
99 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 2.4 1987-12-30
17:57:59
42.46 13.23 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 60169
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-12-30 17:57:59 ± 0.294
Latitude 42.46 ± 0.02
Longitude 13.23 ± 0.02
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 60169

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) 2769
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 134
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 7
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) 0.00146
Epicentral distance of station farthest from the epicenter (degree) 0.00656
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:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 60169
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:57:26
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ASS.Z. 1987-12-30T17:58:26.50 10.0 undecidable manual SG 325 0.0066 1.19 0.2
--.CM8.Z. 1987-12-30T17:58:25.48 10.0 undecidable manual SG 355 0.0066 0.14 0.7
--.ASS.Z. 1987-12-30T17:58:15.00 10.0 undecidable manual PG 325 0.0066 0.45 1.5
--.MNS.Z. 1987-12-30T17:58:15.00 10.0 undecidable manual SG 259 0.0036 0.04 0.9
--.CM8.Z. 1987-12-30T17:58:13.50 10.0 undecidable manual PG 355 0.0066 -1.06 0.6
--.MNS.Z. 1987-12-30T17:58:08.00 10.0 undecidable manual PG 259 0.0036 -0.57 1.5
--.AQU.Z. 1987-12-30T17:58:04.50 10.0 undecidable manual PG 130 0.0015 0.44 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
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