ISTITUTO NAZIONALE DI GEOFISICA E VULCANOLOGIA

Earthquake with magnitude of Md 2.5 on date 03-08-1985 and time 06:20:21 (Italy) in region 5 km W Caldarola (MC)

A magnitude Md 2.5 earthquake occured in region: 5 km W Caldarola (MC), on

  • 03-08-1985 04:20:21 (UTC)
  • 03-08-1985 06:20:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 43.12, 13.18 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
Caldarola MC 5 1823 1823
Serrapetrona MC 6 966 2789
Belforte del Chienti MC 7 1886 4675
Cessapalombo MC 7 512 5187
Camporotondo di Fiastrone MC 8 563 5750
Camerino MC 9 6974 12724
Fiastra MC 10 559 13283
Pievebovigliana MC 10 866 14149
Acquacanina MC 10 121 14270
Muccia MC 12 915 15185
San Ginesio MC 12 3498 18683
San Severino Marche MC 12 12726 31409
Fiordimonte MC 12 202 31611
Tolentino MC 13 20069 51680
Pieve Torina MC 13 1458 53138
Castelraimondo MC 14 4587 57725
Sarnano MC 14 3264 60989
Gualdo MC 15 815 61804
Bolognola MC 15 142 61946
Colmurano MC 16 1263 63209
Gagliole MC 16 620 63829
Ripe San Ginesio MC 16 852 64681
Pioraco MC 17 1134 65815
Sant'Angelo in Pontano MC 18 1436 67251
Sefro MC 18 422 67673
Urbisaglia MC 18 2628 70301
Serravalle di Chienti MC 19 1070 71371
Matelica MC 20 9981 81352

Municipalities with at least 50000 inhabitants

An earthquake occurred to
43 Km E of Foligno (57155 inhabitants)
62 Km SW of Ancona (100861 inhabitants)
64 Km E of Perugia (166134 inhabitants)
67 Km NW of Teramo (54892 inhabitants)
76 Km NE of Terni (111501 inhabitants)
81 Km S of Fano (60888 inhabitants)
88 Km N of L'Aquila (69753 inhabitants)
90 Km S of Pesaro (94582 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 2.5 1985-08-03
04:20:21
43.12 13.18 10 2013-07-15
08:40:51
Bollettino Sismico Italiano INGV 11249
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1985-08-03 04:20:21 ± 0.254
Latitude 43.12 ± 0.02
Longitude 13.18 ± 0.03
Depth (km) 10 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 11249

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) 3217.1
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 159
Number of associated phases, regardless of their use for origin computation 11
Number of defining phases 11
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) 0.00065
Epicentral distance of station farthest from the epicenter (degree) 0.00915
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:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 4
Type of magnitude Md
Reference to an origin 11249
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 17:14:43
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
--.PO9.Z. 1985-08-03T04:20:43.50 10.0 undecidable manual SG 197 0.0052 1.76 0
--.CH1.Z. 1985-08-03T04:20:42.30 10.0 undecidable manual PG 299 0.0091 0.9 0.3
--.ALP.Z. 1985-08-03T04:20:38.20 10.0 undecidable manual SG 140 0.004 0.56 0.6
--.MNS.Z. 1985-08-03T04:20:37.00 10.0 undecidable manual PG 206 0.0074 -0.69 0.6
--.AR1.Z. 1985-08-03T04:20:36.00 10.0 undecidable manual SG 335 0.0036 -0.44 0.5
--.AS1.Z. 1985-08-03T04:20:35.00 10.0 undecidable manual SG 260 0.0034 -0.67 0.3
--.PO9.Z. 1985-08-03T04:20:32.80 10.0 undecidable manual PG 197 0.0052 -0.3 1.2
--.ALP.Z. 1985-08-03T04:20:30.30 10.0 positive manual PG 140 0.004 -0.43 2.3
--.AR1.Z. 1985-08-03T04:20:29.80 10.0 undecidable manual PG 335 0.0036 -0.24 1.4
--.AS1.Z. 1985-08-03T04:20:29.20 10.0 undecidable manual PG 260 0.0034 -0.4 1.2
--.CM2.Z. 1985-08-03T04:20:24.10 10.0 undecidable manual PG 340 0.0006 0.28 2.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Download
Type Description Link
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