Earthquake with magnitude of Md 2.1 on date 19-02-1986 and time 17:38:18 (Italy) in region 4 km SE Cittareale (RI)

A magnitude Md 2.1 earthquake occured in region: 4 km SE Cittareale (RI), on

  • 19-02-1986 16:38:18 (UTC)
  • 19-02-1986 17:38:18 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.59, 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
Cittareale RI 4 482 482
Montereale AQ 9 2581 3063
Borbona RI 10 617 3680
Amatrice RI 10 2657 6337
Posta RI 10 694 7031
Capitignano AQ 12 665 7696
Accumoli RI 13 667 8363
Cagnano Amiterno AQ 15 1369 9732
Campotosto AQ 15 542 10274
Barete AQ 17 737 11011
Leonessa RI 18 2435 13446
Micigliano RI 19 127 13573
Pizzoli AQ 19 4326 17899

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NW of L'Aquila (69753 inhabitants)
43 Km W of Teramo (54892 inhabitants)
44 Km E of Terni (111501 inhabitants)
57 Km SE of Foligno (57155 inhabitants)
76 Km NE of Guidonia Montecelio (88673 inhabitants)
76 Km NE of Tivoli (56533 inhabitants)
79 Km W of Montesilvano (53738 inhabitants)
85 Km W of Chieti (51815 inhabitants)
85 Km W of Pescara (121014 inhabitants)
87 Km SE of Perugia (166134 inhabitants)
91 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 2.1 1986-02-19
16:38:18
42.59 13.19 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 22919
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1986-02-19 16:38:18 ± 0.11
Latitude 42.59 ± 0.01
Longitude 13.19 ± 0.01
Depth (km) 10 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 22919

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) 1337
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 174
Number of associated phases, regardless of their use for origin computation 5
Number of defining phases 5
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.00251
Epicentral distance of station farthest from the epicenter (degree) 0.0038
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:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 1
Type of magnitude Md
Reference to an origin 22919
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:25:02
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.MNS.Z. 1986-02-19T16:38:34.50 10.0 undecidable manual SG 241 0.0038 0.3 0.1
--.ALP.Z. 1986-02-19T16:38:31.69 10.0 undecidable manual SG 55 0.003 0.3 0.1
--.MNS.Z. 1986-02-19T16:38:27.50 10.0 undecidable manual PG 241 0.0038 -0.11 1
--.ALP.Z. 1986-02-19T16:38:25.88 10.0 positive manual PG 55 0.003 -0.11 2.3
--.AQU.Z. 1986-02-19T16:38:25.00 10.0 undecidable manual PG 146 0.0025 0.02 1.4
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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