Earthquake with magnitude of Md 2.7 on date 25-02-1985 and time 01:04:47 (Italy) in region 9 km S Crognaleto (TE)

A magnitude Md 2.7 earthquake occured in region: 9 km S Crognaleto (TE), on

  • 25-02-1985 00:04:47 (UTC)
  • 25-02-1985 01:04:47 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.47, 13.46 at 16 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
Crognaleto TE 9 1297 1297
Pietracamela TE 10 271 1568
Fano Adriano TE 11 296 1864
Campotosto AQ 12 542 2406
Pizzoli AQ 14 4326 6732
Capitignano AQ 14 665 7397
L'Aquila AQ 14 69753 77150
Barete AQ 15 737 77887
Isola del Gran Sasso d'Italia TE 17 4773 82660
Cortino TE 18 656 83316
Poggio Picenze AQ 18 1136 84452
Tossicia TE 18 1406 85858
Montereale AQ 18 2581 88439
Cagnano Amiterno AQ 19 1369 89808
Montorio al Vomano TE 19 8218 98026
Barisciano AQ 19 1828 99854
Scoppito AQ 20 3727 103581
Fossa AQ 20 721 104302
Colledara TE 20 2179 106481

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km NE of L'Aquila (69753 inhabitants)
29 Km SW of Teramo (54892 inhabitants)
57 Km W of Montesilvano (53738 inhabitants)
60 Km W of Chieti (51815 inhabitants)
62 Km W of Pescara (121014 inhabitants)
67 Km E of Terni (111501 inhabitants)
78 Km NE of Tivoli (56533 inhabitants)
80 Km NE of Guidonia Montecelio (88673 inhabitants)
82 Km SE of Foligno (57155 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 2.7 1985-02-25
00:04:47
42.47 13.46 16 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 2449
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-02-25 00:04:47 ± 0.328
Latitude 42.47 ± 0.02
Longitude 13.46 ± 0.04
Depth (km) 16 ± 3 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 2449

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) 3766.5
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 178
Number of associated phases, regardless of their use for origin computation 9
Number of defining phases 9
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.4
Epicentral distance of station closest to the epicenter (degree) 0.00105
Epicentral distance of station farthest from the epicenter (degree) 0.00801
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitude information

Md:2.7

Field Value
Value 2.7
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 2449
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:07:23
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CM8.Z. 1985-02-25T00:05:14.60 10.0 undecidable manual SG 342 0.0068 1.09 0.1
--.RDP.Z. 1985-02-25T00:05:05.20 10.0 undecidable manual PN 217 0.008 0.35 0.9
--.SD1.Z. 1985-02-25T00:05:03.50 10.0 undecidable manual PG 160 0.0072 0.34 1
--.AS1.Z. 1985-02-25T00:05:03.50 10.0 undecidable manual PG 315 0.0074 -0.27 1
--.PO9.Z. 1985-02-25T00:05:02.50 10.0 undecidable manual SG 285 0.0035 0.67 0.4
--.CM8.Z. 1985-02-25T00:05:01.90 10.0 positive manual PG 342 0.0068 -0.46 1.7
--.MNS.Z. 1985-02-25T00:04:58.00 10.0 undecidable manual PG 261 0.0052 -1 0.2
--.PO9.Z. 1985-02-25T00:04:56.00 10.0 undecidable manual PG 285 0.0035 0.39 1
--.AQU.Z. 1985-02-25T00:04:51.00 10.0 positive manual PG 199 0.0011 -0.03 2.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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