Earthquake with magnitude of Md 2.4 on date 13-01-1987 and time 13:03:57 (Italy) in region 2 km SE Cittareale (RI)

A magnitude Md 2.4 earthquake occured in region: 2 km SE Cittareale (RI), on

  • 13-01-1987 12:03:57 (UTC)
  • 13-01-1987 13:03:57 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.6, 13.18 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
Cittareale RI 2 482 482
Amatrice RI 10 2657 3139
Montereale AQ 10 2581 5720
Borbona RI 11 617 6337
Posta RI 11 694 7031
Accumoli RI 12 667 7698
Capitignano AQ 14 665 8363
Cagnano Amiterno AQ 17 1369 9732
Campotosto AQ 17 542 10274
Leonessa RI 18 2435 12709
Cascia PG 19 3217 15926
Barete AQ 19 737 16663
Monteleone di Spoleto PG 19 599 17262
Micigliano RI 20 127 17389

Municipalities with at least 50000 inhabitants

An earthquake occurred to
33 Km NW of L'Aquila (69753 inhabitants)
44 Km E of Terni (111501 inhabitants)
44 Km W of Teramo (54892 inhabitants)
55 Km SE of Foligno (57155 inhabitants)
77 Km NE of Guidonia Montecelio (88673 inhabitants)
78 Km NE of Tivoli (56533 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
85 Km SE of Perugia (166134 inhabitants)
86 Km W of Chieti (51815 inhabitants)
86 Km W of Pescara (121014 inhabitants)
90 Km E of Viterbo (67173 inhabitants)
97 Km NE of Roma (2864731 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 1987-01-13
12:03:57
42.6 13.18 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 39209
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1987-01-13 12:03:57 ± 0.835
Latitude 42.60 ± 0.04
Longitude 13.18 ± 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 39209

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) 5511.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 302
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) 0.3
Epicentral distance of station closest to the epicenter (degree) 0.00526
Epicentral distance of station farthest from the epicenter (degree) 0.0089
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 2
Type of magnitude Md
Reference to an origin 39209
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:39:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AM8.Z. 1987-01-13T12:04:31.82 10.0 undecidable manual SG 17 0.0089 0.94 0.1
--.ARV.Z. 1987-01-13T12:04:28.50 10.0 undecidable manual SG 349 0.0082 0.29 0.4
--.ASS.Z. 1987-01-13T12:04:18.00 10.0 undecidable manual SG 320 0.0053 -0.18 0.5
--.CM8.Z. 1987-01-13T12:04:17.50 10.0 undecidable manual SG 357 0.0053 -0.9 0.1
--.AM8.Z. 1987-01-13T12:04:16.38 10.0 undecidable manual PG 17 0.0089 -0.21 2.3
--.ARV.Z. 1987-01-13T12:04:15.50 10.0 undecidable manual PG 349 0.0082 0.45 0.8
--.ASS.Z. 1987-01-13T12:04:09.50 10.0 undecidable manual PG 320 0.0053 0.24 1.3
--.CM8.Z. 1987-01-13T12:04:08.88 10.0 undecidable manual PG 357 0.0053 -0.25 2.5
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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