Earthquake with magnitude of Md 2.4 on date 06-07-1991 and time 01:37:51 (Italy) in region 6 km W Campotosto (AQ)

A magnitude Md 2.4 earthquake occured in region: 6 km W Campotosto (AQ), on

  • 05-07-1991 23:37:51 (UTC)
  • 06-07-1991 01:37:51 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.58, 13.31 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 6 542 542
Amatrice RI 6 2657 3199
Capitignano AQ 6 665 3864
Montereale AQ 8 2581 6445
Cittareale RI 13 482 6927
Accumoli RI 14 667 7594
Barete AQ 14 737 8331
Crognaleto TE 15 1297 9628
Cagnano Amiterno AQ 15 1369 10997
Pizzoli AQ 16 4326 15323
Borbona RI 16 617 15940
Cortino TE 17 656 16596
Posta RI 18 694 17290
Fano Adriano TE 19 296 17586

Municipalities with at least 50000 inhabitants

An earthquake occurred to
26 Km N of L'Aquila (69753 inhabitants)
34 Km W of Teramo (54892 inhabitants)
54 Km E of Terni (111501 inhabitants)
65 Km SE of Foligno (57155 inhabitants)
70 Km W of Montesilvano (53738 inhabitants)
75 Km W of Chieti (51815 inhabitants)
76 Km W of Pescara (121014 inhabitants)
80 Km NE of Tivoli (56533 inhabitants)
80 Km NE of Guidonia Montecelio (88673 inhabitants)
95 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 2.4 1991-07-05
23:37:51
42.58 13.31 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 144729
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1991-07-05 23:37:51 ± 0.121
Latitude 42.58 ± 0.01
Longitude 13.31 ± 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 144729

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) 1266.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 113
Number of associated phases, regardless of their use for origin computation 16
Number of defining phases 16
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) 0.0021
Epicentral distance of station farthest from the epicenter (degree) 0.00858
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

Md:2.4

Field Value
Value 2.4
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 144729
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:15:08
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.ARV.Z. 1991-07-05T23:38:24.67 10.0 undecidable manual SG 344 0.0086 0.37 0.4
--.SDI.Z. 1991-07-05T23:38:23.92 10.0 undecidable manual SG 156 0.0085 0 0.6
--.ASS.Z. 1991-07-05T23:38:15.79 10.0 undecidable manual SG 315 0.0061 0.36 0.5
--.CIO.Z. 1991-07-05T23:38:13.82 10.0 undecidable manual SG 349 0.0056 0.1 0.8
--.SDI.Z. 1991-07-05T23:38:11.28 10.0 undecidable manual PG 156 0.0085 1 0.1
--.MNS.Z. 1991-07-05T23:38:10.29 10.0 undecidable manual SG 247 0.0045 0.68 0.3
--.ARV.Z. 1991-07-05T23:38:10.16 10.0 undecidable manual PG 344 0.0086 -0.35 1.1
--.RMF.Z. 1991-07-05T23:38:05.61 10.0 undecidable manual SG 349 0.0034 -0.23 0.8
--.ASS.Z. 1991-07-05T23:38:05.63 10.0 undecidable manual PG 315 0.0061 0.25 1.7
--.CIO.Z. 1991-07-05T23:38:04.22 10.0 undecidable manual PG 349 0.0056 -0.17 1.9
--.ALP.Z. 1991-07-05T23:38:02.88 10.0 undecidable manual SG 43 0.0024 0.37 0.6
--.MNS.Z. 1991-07-05T23:38:01.52 10.0 undecidable manual PG 247 0.0045 -0.5 1
--.AQU.Z. 1991-07-05T23:38:00.52 10.0 undecidable manual SG 162 0.0021 -0.59 0.2
--.RMF.Z. 1991-07-05T23:37:59.78 10.0 undecidable manual PG 349 0.0034 -0.06 2.1
--.ALP.Z. 1991-07-05T23:37:57.86 10.0 undecidable manual PG 43 0.0024 -0.07 2.1
--.AQU.Z. 1991-07-05T23:37:56.93 10.0 undecidable manual PG 162 0.0021 -0.19 1.8
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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