Earthquake with magnitude of Md 2.2 on date 06-07-1991 and time 06:02:17 (Italy) in region 4 km W Campotosto (AQ)

A magnitude Md 2.2 earthquake occured in region: 4 km W Campotosto (AQ), on

  • 06-07-1991 04:02:17 (UTC)
  • 06-07-1991 06:02:17 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.57, 13.33 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
Campotosto AQ 4 542 542
Capitignano AQ 6 665 1207
Amatrice RI 8 2657 3864
Montereale AQ 9 2581 6445
Crognaleto TE 12 1297 7742
Barete AQ 14 737 8479
Cittareale RI 15 482 8961
Pizzoli AQ 15 4326 13287
Cagnano Amiterno AQ 15 1369 14656
Accumoli RI 16 667 15323
Cortino TE 16 656 15979
Fano Adriano TE 17 296 16275
Borbona RI 17 617 16892
Pietracamela TE 19 271 17163
Posta RI 20 694 17857

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km N of L'Aquila (69753 inhabitants)
32 Km W of Teramo (54892 inhabitants)
56 Km E of Terni (111501 inhabitants)
67 Km SE of Foligno (57155 inhabitants)
67 Km W of Montesilvano (53738 inhabitants)
73 Km W of Chieti (51815 inhabitants)
73 Km W of Pescara (121014 inhabitants)
80 Km NE of Tivoli (56533 inhabitants)
80 Km NE of Guidonia Montecelio (88673 inhabitants)
97 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 2.2 1991-07-06
04:02:17
42.57 13.33 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 144749
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-07-06 04:02:17 ± 0.151
Latitude 42.57 ± 0.01
Longitude 13.33 ± 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 144749

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) 1594.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 117
Number of associated phases, regardless of their use for origin computation 13
Number of defining phases 13
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) 0.00194
Epicentral distance of station farthest from the epicenter (degree) 0.00834
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:2.2

Field Value
Value 2.2
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 144749
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:15:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ASS.Z. 1991-07-06T04:02:43.00 10.0 undecidable manual SG 314 0.0062 1.12 0
--.CIO.Z. 1991-07-06T04:02:39.70 10.0 undecidable manual SG 347 0.0057 -0.87 0.1
--.MNS.Z. 1991-07-06T04:02:36.00 10.0 undecidable manual SG 249 0.0046 0.1 0.8
--.SDI.Z. 1991-07-06T04:02:35.50 10.0 undecidable manual PG 157 0.0083 -0.36 1.1
--.ASS.Z. 1991-07-06T04:02:32.00 10.0 undecidable manual PG 314 0.0062 0.42 1.2
--.RMF.Z. 1991-07-06T04:02:31.25 10.0 undecidable manual SG 347 0.0035 -0.82 0.2
--.CIO.Z. 1991-07-06T04:02:30.16 10.0 undecidable manual PG 347 0.0057 -0.3 1.5
--.ALP.Z. 1991-07-06T04:02:28.70 10.0 undecidable manual SG 39 0.0024 -0.11 0.8
--.MNS.Z. 1991-07-06T04:02:27.63 10.0 undecidable manual PG 249 0.0046 -0.5 1.2
--.RMF.Z. 1991-07-06T04:02:26.11 10.0 undecidable manual PG 347 0.0035 0.19 2
--.AQU.Z. 1991-07-06T04:02:26.62 10.0 undecidable manual SG 166 0.0019 0.06 0.9
--.ALP.Z. 1991-07-06T04:02:24.90 10.0 undecidable manual PG 39 0.0024 0.42 1.4
--.AQU.Z. 1991-07-06T04:02:23.60 10.0 undecidable manual PG 166 0.0019 0.33 1.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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