Earthquake with magnitude of Md 3.0 on date 21-04-1989 and time 12:17:35 (UTC) in region 2 km SE Arquata del Tronto (AP)

A magnitude Md 3.0 earthquake occured in region: 2 km SE Arquata del Tronto (AP), on

  • 21-04-1989 12:17:35 (UTC)
  • 21-04-1989 14:17:35 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.76, 13.31 at 5 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
Arquata del Tronto AP 2 1178 1178
Acquasanta Terme AP 8 2916 4094
Accumoli RI 8 667 4761
Montegallo AP 10 523 5284
Amatrice RI 14 2657 7941
Valle Castellana TE 16 977 8918
Montemonaco AP 16 604 9522
Roccafluvione AP 18 2010 11532
Norcia PG 18 4957 16489
Rocca Santa Maria TE 19 537 17026
Cittareale RI 20 482 17508

Municipalities with at least 50000 inhabitants

An earthquake occurred to
34 Km W of Teramo (54892 inhabitants)
46 Km N of L'Aquila (69753 inhabitants)
54 Km E of Foligno (57155 inhabitants)
58 Km E of Terni (111501 inhabitants)
74 Km W of Montesilvano (53738 inhabitants)
81 Km W of Pescara (121014 inhabitants)
83 Km NW of Chieti (51815 inhabitants)
85 Km E of Perugia (166134 inhabitants)
97 Km NE of Guidonia Montecelio (88673 inhabitants)
97 Km S of Ancona (100861 inhabitants)
98 Km NE of Tivoli (56533 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 3.0
ML-VAX 2.5
1989-04-21
12:17:35
42.76 13.31 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 90269
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-04-21 12:17:35 ± 0.183
Latitude 42.76 ± 0.01
Longitude 13.31 ± 0.02
Depth (km) 5 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 90269

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) 1887.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 71
Number of associated phases, regardless of their use for origin computation 33
Number of defining phases 33
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.6
Epicentral distance of station closest to the epicenter (degree) 0.0017
Epicentral distance of station farthest from the epicenter (degree) 0.03092
Number of stations at which the event was observed 17
Number of stations from which data was used for origin computation 17
Magnitudes information

Md:3

Field Value
Value 3
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 90269
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:24:41

ML:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 6
Type of magnitude ML
Reference to an origin 90269
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2015-04-28 13:07:13
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.BOB.Z. 1989-04-21T12:18:29.70 10.0 undecidable manual PN 307 0.0309 0.25 0.6
--.SFI.Z. 1989-04-21T12:18:25.97 10.0 undecidable manual SN 317 0.0141 1.5 0.1
--.RFI.Z. 1989-04-21T12:18:24.19 10.0 undecidable manual SN 160 0.0138 0.36 0.4
--.CP9.Z. 1989-04-21T12:18:10.14 10.0 undecidable manual SG 196 0.0083 1.92 0
--.SGG.Z. 1989-04-21T12:18:06.20 10.0 undecidable manual PN 149 0.0142 2.24 0
--.AM8.Z. 1989-04-21T12:18:05.12 10.0 undecidable manual SG 14 0.0074 0.51 0.8
--.ARV.Z. 1989-04-21T12:18:04.48 10.0 undecidable manual SG 340 0.007 0.86 0.4
--.SFI.Z. 1989-04-21T12:18:04.63 10.0 undecidable manual PN 317 0.0141 0.89 0.6
--.PGD.Z. 1989-04-21T12:18:04.88 10.0 undecidable manual PN 314 0.0144 0.54 0.9
--.RFI.Z. 1989-04-21T12:18:03.95 10.0 undecidable manual PN 160 0.0138 0.58 0.9
--.MNS.Z. 1989-04-21T12:17:58.90 10.0 undecidable manual SG 231 0.0053 0.73 0.4
--.RDP.Z. 1989-04-21T12:17:57.30 10.0 undecidable manual PN 204 0.0098 -0.19 1.3
--.ASS.Z. 1989-04-21T12:17:57.81 10.0 undecidable manual SG 302 0.0051 1.18 0.2
--.MC8.Z. 1989-04-21T12:17:56.90 10.0 undecidable manual SG 8 0.0049 1.19 0.3
--.CP9.Z. 1989-04-21T12:17:53.91 10.0 undecidable manual PG 196 0.0083 -0.45 1.3
--.CM8.Z. 1989-04-21T12:17:52.89 10.0 undecidable manual SG 344 0.004 -0.01 0.9
--.AM8.Z. 1989-04-21T12:17:51.10 10.0 undecidable manual PG 14 0.0074 -1.17 1.1
--.ARV.Z. 1989-04-21T12:17:51.10 10.0 negative manual PG 340 0.007 -0.6 2.4
--.AZI.Z. 1989-04-21T12:17:50.90 10.0 undecidable manual PG 173 0.007 -1.34 0.4
--.AQU.Z. 1989-04-21T12:17:50.12 10.0 undecidable manual SG 170 0.0036 -1.08 0.3
--.ASS.Z. 1989-04-21T12:17:47.56 10.0 negative manual PG 302 0.0051 -0.11 3.1
--.MNS.Z. 1989-04-21T12:17:47.78 10.0 undecidable manual PG 231 0.0053 -0.31 1.4
--.SS8.Z. 1989-04-21T12:17:46.10 10.0 undecidable manual SG 346 0.0023 0.61 0.7
--.MC8.Z. 1989-04-21T12:17:46.90 10.0 undecidable manual PG 8 0.0049 -0.24 1.5
--.ALP.Z. 1989-04-21T12:17:44.10 10.0 undecidable manual SG 82 0.0017 1.2 0.3
--.CM8.Z. 1989-04-21T12:17:44.90 10.0 undecidable manual PG 344 0.004 -0.61 2.3
--.AQU.Z. 1989-04-21T12:17:43.76 10.0 undecidable manual PG 170 0.0036 -0.77 1
--.SS8.Z. 1989-04-21T12:17:41.40 10.0 undecidable manual PG 346 0.0023 0.16 3
--.ALP.Z. 1989-04-21T12:17:39.90 10.0 undecidable manual PG 82 0.0017 0.16 3
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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