Earthquake with magnitude of Md 2.1 on date 04-01-1989 and time 07:54:54 (Italy) in region 7 km E Accumoli (RI)

A magnitude Md 2.1 earthquake occured in region: 7 km E Accumoli (RI), on

  • 04-01-1989 06:54:54 (UTC)
  • 04-01-1989 07:54:54 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.71, 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
Accumoli RI 7 667 667
Arquata del Tronto AP 7 1178 1845
Acquasanta Terme AP 9 2916 4761
Amatrice RI 10 2657 7418
Valle Castellana TE 14 977 8395
Montegallo AP 15 523 8918
Rocca Santa Maria TE 16 537 9455
Cortino TE 18 656 10111
Campotosto AQ 18 542 10653
Cittareale RI 18 482 11135

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km W of Teramo (54892 inhabitants)
41 Km N of L'Aquila (69753 inhabitants)
58 Km E of Foligno (57155 inhabitants)
59 Km E of Terni (111501 inhabitants)
70 Km W of Montesilvano (53738 inhabitants)
77 Km W of Pescara (121014 inhabitants)
79 Km NW of Chieti (51815 inhabitants)
89 Km SE of Perugia (166134 inhabitants)
94 Km NE of Guidonia Montecelio (88673 inhabitants)
94 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 2.1
ML-VAX 1.8
1989-01-04
06:54:54
42.71 13.33 10 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 84649
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1989-01-04 06:54:54 ± 0.141
Latitude 42.71 ± 0.01
Longitude 13.33 ± 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 84649

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) 1172.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 167
Number of associated phases, regardless of their use for origin computation 14
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.2
Epicentral distance of station closest to the epicenter (degree) 0.00162
Epicentral distance of station farthest from the epicenter (degree) 0.00769
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 7
Magnitudes information

Md:2.1

Field Value
Value 2.1
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 84649
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 18:19:27

ML:1.8

Field Value
Value 1.8
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 84649
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
--.AM8.Z. 1989-01-04T06:55:25.10 10.0 undecidable manual SG 13 0.0077 0.78 0
--.ARV.Z. 1989-01-04T06:55:24.11 10.0 undecidable manual SG 340 0.0074 0.52 0.1
--.ASS.Z. 1989-01-04T06:55:16.72 10.0 undecidable manual SG 305 0.0054 0.39 0.3
--.MNS.Z. 1989-01-04T06:55:15.75 10.0 undecidable manual SG 236 0.0052 0.29 0.4
--.CM8.Z. 1989-01-04T06:55:12.70 10.0 undecidable manual SG 344 0.0045 -0.16 0.8
--.AM8.Z. 1989-01-04T06:55:11.20 10.0 undecidable manual PG 13 0.0077 -0.67 0.1
--.ARV.Z. 1989-01-04T06:55:11.30 10.0 undecidable manual PG 340 0.0074 -0.15 1
--.ASS.Z. 1989-01-04T06:55:07.31 10.0 undecidable manual PG 305 0.0054 0.05 1.3
--.MNS.Z. 1989-01-04T06:55:06.75 10.0 undecidable manual PG 236 0.0052 -0.01 1.4
--.SS8.Z. 1989-01-04T06:55:06.60 10.0 undecidable manual SG 345 0.0027 0.08 0.8
--.CM8.Z. 1989-01-04T06:55:04.90 10.0 undecidable manual PG 344 0.0045 -0.36 1.5
--.ALP.Z. 1989-01-04T06:55:02.70 10.0 undecidable manual SG 68 0.0016 0.01 0.9
--.SS8.Z. 1989-01-04T06:55:01.50 10.0 undecidable manual PG 345 0.0027 -0.09 2.7
--.ALP.Z. 1989-01-04T06:54:59.50 10.0 undecidable manual PG 68 0.0016 0.12 2.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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