Earthquake with magnitude of Md 2.5 on date 26-04-1985 and time 04:48:51 (Italy) in region 8 km S Crognaleto (TE)

A magnitude Md 2.5 earthquake occured in region: 8 km S Crognaleto (TE), on

  • 26-04-1985 02:48:51 (UTC)
  • 26-04-1985 04:48:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.48, 13.45 at 11 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 8 1297 1297
Pietracamela TE 10 271 1568
Fano Adriano TE 11 296 1864
Campotosto AQ 11 542 2406
Capitignano AQ 13 665 3071
Pizzoli AQ 14 4326 7397
Barete AQ 14 737 8134
L'Aquila AQ 15 69753 77887
Cortino TE 17 656 78543
Isola del Gran Sasso d'Italia TE 17 4773 83316
Tossicia TE 18 1406 84722
Montereale AQ 18 2581 87303
Montorio al Vomano TE 19 8218 95521
Cagnano Amiterno AQ 19 1369 96890
Poggio Picenze AQ 19 1136 98026
Colledara TE 20 2179 100205

Municipalities with at least 50000 inhabitants

An earthquake occurred to
15 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)
79 Km NE of Tivoli (56533 inhabitants)
80 Km NE of Guidonia Montecelio (88673 inhabitants)
81 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 2.5 1985-04-26
02:48:51
42.48 13.45 11 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 5519
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-04-26 02:48:51 ± 0.895
Latitude 42.48 ± 0.04
Longitude 13.45 ± 0.04
Depth (km) 11 ± 19 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 5519

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) 5373.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 181
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 12
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) 0.00113
Epicentral distance of station farthest from the epicenter (degree) 0.00745
Number of stations at which the event was observed 6
Number of stations from which data was used for origin computation 6
Magnitude information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 5519
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:09:58
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.AS1.Z. 1985-04-26T02:49:20.00 10.0 undecidable manual SG 314 0.0074 0.01 0.5
--.CM2.Z. 1985-04-26T02:49:16.90 10.0 undecidable manual SG 342 0.0067 -0.52 0.4
--.MNS.Z. 1985-04-26T02:49:13.00 10.0 undecidable manual SG 260 0.0052 1.03 0.2
--.AS1.Z. 1985-04-26T02:49:10.10 10.0 undecidable manual PG? 314 0.0074 2.16 0
--.PO9.Z. 1985-04-26T02:49:06.00 10.0 undecidable manual SG 284 0.0035 0.12 0.6
--.CM2.Z. 1985-04-26T02:49:05.80 10.0 undecidable manual PG 342 0.0067 -0.66 1.7
--.ALP.Z. 1985-04-26T02:49:04.30 10.0 undecidable manual SG 15 0.0028 0.86 0.5
--.MNS.Z. 1985-04-26T02:49:02.00 10.0 undecidable manual PG 260 0.0052 -1.31 0.3
--.PO9.Z. 1985-04-26T02:48:59.50 10.0 undecidable manual PG 284 0.0035 -0.3 1.4
--.ALP.Z. 1985-04-26T02:48:58.10 10.0 undecidable manual PG 15 0.0028 -0.29 2.9
--.AQU.Z. 1985-04-26T02:48:57.50 10.0 undecidable manual SG 196 0.0011 -0.21 0.9
--.AQU.Z. 1985-04-26T02:48:55.50 10.0 positive manual PG 196 0.0011 0.42 2.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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