Earthquake with magnitude of Md 2.6 on date 20-12-1990 and time 04:46:32 (Italy) in region 3 km W Falerone (FM)

A magnitude Md 2.6 earthquake occured in region: 3 km W Falerone (FM), on

  • 20-12-1990 03:46:32 (UTC)
  • 20-12-1990 04:46:32 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 43.1, 13.44 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
Falerone FM 3 3337 3337
Sant'Angelo in Pontano MC 4 1436 4773
Monte Vidon Corrado FM 4 731 5504
Montappone FM 4 1682 7186
Servigliano FM 5 2336 9522
Penna San Giovanni MC 5 1108 10630
Massa Fermana FM 6 963 11593
Loro Piceno MC 7 2401 13994
Ripe San Ginesio MC 7 852 14846
Monte San Martino MC 8 765 15611
Belmonte Piceno FM 8 646 16257
Montegiorgio FM 8 6851 23108
Gualdo MC 9 815 23923
Colmurano MC 10 1263 25186
Monteleone di Fermo FM 10 395 25581
Mogliano MC 10 4696 30277
San Ginesio MC 10 3498 33775
Monsampietro Morico FM 10 659 34434
Santa Vittoria in Matenano FM 10 1330 35764
Smerillo FM 11 365 36129
Urbisaglia MC 12 2628 38757
Montelparo FM 12 778 39535
Magliano di Tenna FM 13 1452 40987
Francavilla d'Ete FM 13 964 41951
Montottone FM 13 979 42930
Montefalcone Appennino FM 13 424 43354
Grottazzolina FM 13 3398 46752
Petriolo MC 13 1998 48750
Sarnano MC 14 3264 52014
Rapagnano FM 14 2145 54159
Monte Rinaldo FM 14 379 54538
Camporotondo di Fiastrone MC 15 563 55101
Cessapalombo MC 15 512 55613
Monte San Pietrangeli FM 15 2458 58071
Amandola FM 15 3629 61700
Monte Giberto FM 16 801 62501
Ortezzano FM 16 774 63275
Force AP 16 1354 64629
Torre San Patrizio FM 16 2048 66677
Comunanza AP 16 3166 69843
Monte Vidon Combatte FM 17 433 70276
Corridonia MC 17 15430 85706
Tolentino MC 17 20069 105775
Belforte del Chienti MC 18 1886 107661
Ponzano di Fermo FM 18 1674 109335
Caldarola MC 18 1823 111158
Petritoli FM 18 2335 113493
Montalto delle Marche AP 19 2122 115615
Montedinove AP 19 488 116103
Monte San Giusto MC 19 8191 124294
Rotella AP 19 906 125200
Pollenza MC 20 6618 131818
Montefortino FM 20 1178 132996

Municipalities with at least 50000 inhabitants

An earthquake occurred to
54 Km NW of Teramo (54892 inhabitants)
57 Km S of Ancona (100861 inhabitants)
62 Km E of Foligno (57155 inhabitants)
84 Km N of L'Aquila (69753 inhabitants)
85 Km E of Perugia (166134 inhabitants)
88 Km NW of Montesilvano (53738 inhabitants)
89 Km NE of Terni (111501 inhabitants)
89 Km SE of Fano (60888 inhabitants)
95 Km NW of Pescara (121014 inhabitants)
99 Km SE 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
Bulletin
Rev1000
Md 2.6
ML-VAX 2.0
1990-12-20
03:46:32
43.11 13.44 5 2013-07-15
08:41:04
Bollettino Sismico Italiano INGV 132819
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 1990-12-20 03:46:32 ± 0.233
Latitude 43.11 ± 0.01
Longitude 13.44 ± 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 132819

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) 2286.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 149
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.7
Epicentral distance of station closest to the epicenter (degree) 0.0017
Epicentral distance of station farthest from the epicenter (degree) 0.01263
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitudes information

Md:2.6

Field Value
Value 2.6
Uncertainty
Num. used stations 3
Type of magnitude Md
Reference to an origin 132819
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-04 19:03:45

ML:2

Field Value
Value 2
Uncertainty
Num. used stations 2
Type of magnitude ML
Reference to an origin 132819
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
--.CRE.Z. 1990-12-20T03:47:13.52 10.0 undecidable manual SN 295 0.0108 0.95 0.2
--.SFI.Z. 1990-12-20T03:46:59.00 10.0 undecidable manual PN 305 0.0126 0.66 0.6
--.AQU.Z. 1990-12-20T03:46:58.48 10.0 undecidable manual SG 182 0.0067 -0.72 0.4
--.CRE.Z. 1990-12-20T03:46:56.70 10.0 undecidable manual PN 295 0.0108 1.18 0.3
--.ASS.Z. 1990-12-20T03:46:52.91 10.0 undecidable manual SG 266 0.0052 -0.71 0.4
--.ARV.Z. 1990-12-20T03:46:51.25 10.0 undecidable manual SG 317 0.0048 -1 0.3
--.AOI.Z. 1990-12-20T03:46:49.40 10.0 undecidable manual SG 14 0.0041 -0.42 0.8
--.AQU.Z. 1990-12-20T03:46:49.30 10.0 undecidable manual PG 182 0.0067 1.23 0.4
--.ALP.Z. 1990-12-20T03:46:45.60 10.0 undecidable manual SG 164 0.003 0.28 0.8
--.ASS.Z. 1990-12-20T03:46:43.57 10.0 positive manual PG 266 0.0052 -1.01 1.4
--.CIO.Z. 1990-12-20T03:46:42.30 10.0 undecidable manual SG 292 0.0021 0.88 0.5
--.ARV.Z. 1990-12-20T03:46:42.81 10.0 negative manual PG 317 0.0048 -0.98 1.4
--.AOI.Z. 1990-12-20T03:46:41.50 10.0 undecidable manual PG 14 0.0041 -0.88 1.6
--.SSO.Z. 1990-12-20T03:46:40.90 10.0 undecidable manual SG 355 0.0017 1.19 0.3
--.ALP.Z. 1990-12-20T03:46:39.70 10.0 undecidable manual PG 164 0.003 -0.08 2.9
--.SSO.Z. 1990-12-20T03:46:37.30 10.0 undecidable manual PG 355 0.0017 0.75 1.9
--.CIO.Z. 1990-12-20T03:46:37.90 10.0 undecidable manual PG 292 0.0021 0.37 2.7
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
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