Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of Md 2.5 on date 20-03-1992 and time 21:31:56 (Italy) in region 7 km SE Massa Martana (PG)

A magnitude Md 2.5 earthquake occured in region: 7 km SE Massa Martana (PG), on

  • 20-03-1992 20:31:56 (UTC)
  • 20-03-1992 21:31:56 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7440, 12.5920 at 8 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.

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Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Massa Martana PG 7 3770 3770
Acquasparta TR 7 4778 8548
Giano dell'Umbria PG 10 3846 12394
Castel Ritaldi PG 11 3278 15672
Spoleto PG 12 38218 53890
Montecastrilli TR 13 5022 58912
San Gemini TR 15 5018 63930
Todi PG 16 16851 80781
Avigliano Umbro TR 17 2558 83339
Campello sul Clitunno PG 17 2442 85781
Montefalco PG 18 5679 91460
Gualdo Cattaneo PG 19 6155 97615
Trevi PG 20 8469 106084
Scheggino PG 20 461 106545

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km N of Terni (111501 inhabitants)
25 Km SW of Foligno (57155 inhabitants)
44 Km SE of Perugia (166134 inhabitants)
54 Km NE of Viterbo (67173 inhabitants)
79 Km NW of L'Aquila (69753 inhabitants)
83 Km N of Guidonia Montecelio (88673 inhabitants)
88 Km N of Tivoli (56533 inhabitants)
92 Km W of Teramo (54892 inhabitants)
95 Km N of Roma (2864731 inhabitants)
98 Km NE of Civitavecchia (52991 inhabitants)
99 Km SE of Arezzo (99543 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
Bulletin
Rev1000 		Md 2.5
ML-VAX 2.0 		1992-03-20
20:31:56		 42.744 12.592 8 2013-07-15
08:40:51		 Bollettino Sismico Italiano INGV 160969
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1992-03-20 20:31:56 ± 0.628
Latitude 42.7440 ± 0.0115
Longitude 12.5920 ± 0.0220
Depth (km) 8 ± 4 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-VAX
Event type earthquake
Origin ID 160969

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) 2201.7
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 161
Number of associated phases, regardless of their use for origin computation 21
Number of defining phases 21
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) 0.00283
Epicentral distance of station farthest from the epicenter (degree) 0.01230
Number of stations at which the event was observed 11
Number of stations from which data was used for origin computation 11
Magnitudes information

Md:2.5

Field Value
Value 2.5
Uncertainty
Num. used stations 5
Type of magnitude Md
Reference to an origin 160969
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:30:26

ML:2.0

Field Value
Value 2.0
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 160969
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(km) Takeoff_angle Residual Weight
--.SDI.Z. 1992-03-20T20:32:39.00 10.0 undecidable manual SN 138 1.3653 -1.38 0.1
--.SFI.Z. 1992-03-20T20:32:38.34 10.0 undecidable manual SN 335 1.2765 0.16 0.6
--.PGD.Z. 1992-03-20T20:32:37.40 10.0 undecidable manual SN 331 1.2987 -1.17 0.2
--.CRE.Z. 1992-03-20T20:32:31.31 10.0 undecidable manual SG 332 0.9879 0.45 0.6
--.ARV.Z. 1992-03-20T20:32:25.00 10.0 undecidable manual SG 18 0.7881 0.39 0.7
--.AQU.Z. 1992-03-20T20:32:23.50 10.0 undecidable manual SG 122 0.7104 1.6 0.1
--.ALP.Z. 1992-03-20T20:32:22.80 10.0 undecidable manual SG 86 0.7104 0.77 0.5
--.PGD.Z. 1992-03-20T20:32:21.89 10.0 undecidable manual PN 331 1.2987 1.01 0.7
--.SDI.Z. 1992-03-20T20:32:21.79 10.0 undecidable manual PN 138 1.3653 -0.14 1.5
--.SFI.Z. 1992-03-20T20:32:20.95 10.0 undecidable manual PN 335 1.2765 0.3 1.5
--.CIO.Z. 1992-03-20T20:32:18.30 10.0 undecidable manual SG 41 0.5994 -0.14 1.2
--.CRE.Z. 1992-03-20T20:32:15.98 10.0 undecidable manual PG 332 0.9879 -0.46 1.5
--.ARV.Z. 1992-03-20T20:32:14.00 10.0 undecidable manual PG 18 0.7881 1.18 0.6
--.AQU.Z. 1992-03-20T20:32:12.47 10.0 undecidable manual PG 122 0.7104 1.21 0.6
--.MNS.Z. 1992-03-20T20:32:11.00 10.0 undecidable manual SG 169 0.3552 0.26 0.8
--.ALP.Z. 1992-03-20T20:32:11.10 10.0 undecidable manual PG 86 0.7104 -0.23 1.9
--.ASS.Z. 1992-03-20T20:32:09.22 10.0 undecidable manual SG 7 0.3108 -0.12 0.8
--.CIO.Z. 1992-03-20T20:32:08.70 10.0 undecidable manual PG 41 0.5994 -0.55 1.6
--.RMF.Z. 1992-03-20T20:32:06.50 10.0 undecidable manual PG 64 0.4995 -0.79 2.4
--.MNS.Z. 1992-03-20T20:32:04.80 10.0 undecidable manual PG 169 0.3552 -0.73 1.3
--.ASS.Z. 1992-03-20T20:32:03.74 10.0 undecidable manual PG 7 0.3108 -0.27 1.9
TDMT - Time Domain Moment Tensor
Fault Plane solutions in the area
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download