Earthquake with magnitude of Md 2.8 on date 25-12-1985 and time 17:24:24 (UTC) in region 4 km SW Pertosa (SA)

A magnitude Md 2.8 earthquake occured in region: 4 km SW Pertosa (SA), on

  • 25-12-1985 17:24:24 (UTC)
  • 25-12-1985 18:24:24 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 40.51, 15.42 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
Pertosa SA 4 690 690
Petina SA 5 1159 1849
Auletta SA 5 2336 4185
Polla SA 6 5279 9464
Sant'Arsenio SA 7 2815 12279
San Pietro al Tanagro SA 9 1695 13974
Caggiano SA 9 2765 16739
Sant'Angelo a Fasanella SA 9 635 17374
Corleto Monforte SA 9 592 17966
Salvitelle SA 9 560 18526
San Rufo SA 9 1754 20280
Ottati SA 11 618 20898
Sicignano degli Alburni SA 11 3519 24417
Vietri di Potenza PZ 12 2832 27249
Sant'Angelo Le Fratte PZ 12 1429 28678
Romagnano al Monte SA 13 368 29046
Savoia di Lucania PZ 13 1127 30173
Atena Lucana SA 13 2336 32509
Bellosguardo SA 14 794 33303
Buccino SA 14 5047 38350
Roscigno SA 14 817 39167
Sacco SA 15 492 39659
San Gregorio Magno SA 16 4286 43945
Castelcivita SA 16 1739 45684
Aquara SA 16 1545 47229
Postiglione SA 17 2151 49380
Balvano PZ 17 1830 51210
Teggiano SA 18 7976 59186
Brienza PZ 18 4078 63264
Ricigliano SA 18 1144 64408
Controne SA 18 875 65283
Satriano di Lucania PZ 19 2374 67657
Sala Consilina SA 19 12664 80321
Piaggine SA 19 1311 81632
Valle dell'Angelo SA 19 248 81880
Castel San Lorenzo SA 20 2471 84351
Palomonte SA 20 3985 88336

Municipalities with at least 50000 inhabitants

An earthquake occurred to
35 Km W of Potenza (67122 inhabitants)
38 Km E of Battipaglia (50786 inhabitants)
59 Km E of Salerno (135261 inhabitants)
64 Km E of Cava de' Tirreni (53659 inhabitants)
69 Km SE of Avellino (54857 inhabitants)
80 Km E of Scafati (50787 inhabitants)
82 Km E of Castellammare di Stabia (66466 inhabitants)
87 Km SE of Benevento (60091 inhabitants)
93 Km SW of Cerignola (58396 inhabitants)
94 Km E of Torre del Greco (86275 inhabitants)
96 Km E of Portici (55274 inhabitants)
97 Km E of Ercolano (53709 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 2.8 1985-12-25
17:24:24
40.51 15.42 11 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 18969
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-12-25 17:24:24 ± 0.273
Latitude 40.51 ± 0.02
Longitude 15.42 ± 0.03
Depth (km) 11 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 18969

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) 3717.3
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 135
Number of associated phases, regardless of their use for origin computation 8
Number of defining phases 8
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) 0.00081
Epicentral distance of station farthest from the epicenter (degree) 0.01263
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:2.8

Field Value
Value 2.8
Uncertainty
Num. used stations 2
Type of magnitude Md
Reference to an origin 18969
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:21:41
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.CZI.Z. 1985-12-25T17:24:50.10 10.0 undecidable manual PN 156 0.0126 0.51 0.9
--.TR9.Z. 1985-12-25T17:24:44.30 10.0 undecidable manual SG 344 0.0049 0.34 0.7
--.ORI.Z. 1985-12-25T17:24:43.00 10.0 undecidable manual PG 120 0.0081 0.73 0.9
--.SOR.Z. 1985-12-25T17:24:40.80 10.0 undecidable manual PG 274 0.0074 0 1.7
--.MMN.Z. 1985-12-25T17:24:38.20 10.0 undecidable manual PG 144 0.0068 -1.34 0.3
--.TR9.Z. 1985-12-25T17:24:34.90 10.0 undecidable manual PG 344 0.0049 -0.78 1
--.SGO.Z. 1985-12-25T17:24:30.00 10.0 undecidable manual SG 297 0.0008 0.36 0.7
--.SGO.Z. 1985-12-25T17:24:27.50 10.0 undecidable manual PG 297 0.0008 0.09 1.9
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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Type Description Link
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