Istituto Nazionale di Geofisica e Vulcanologia

Earthquake with magnitude of ML 2.1 on date 20-09-2010 and time 18:21:54 (Italy) in region 4 km E Offida (AP)

A magnitude ML 2.1 earthquake occured in region: 4 km E Offida (AP), on

  • 20-09-2010 16:21:54 (UTC)
  • 20-09-2010 18:21:54 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.9330, 13.7390 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.

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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
Offida AP 4 5058 5058
Castorano AP 4 2380 7438
Spinetoli AP 6 7215 14653
Monsampolo del Tronto AP 6 4611 19264
Colli del Tronto AP 6 3668 22932
Acquaviva Picena AP 6 3831 26763
Appignano del Tronto AP 7 1785 28548
Cossignano AP 7 978 29526
Castel di Lama AP 7 8634 38160
Ripatransone AP 8 4309 42469
Monteprandone AP 8 12655 55124
Castignano AP 10 2796 57920
Ancarano TE 11 1857 59777
Controguerra TE 11 2436 62213
San Benedetto del Tronto AP 12 47303 109516
Maltignano AP 12 2401 111917
Carassai AP 12 1100 113017
Sant'Egidio alla Vibrata TE 12 9811 122828
Montalto delle Marche AP 12 2122 124950
Grottammare AP 12 16006 140956
Colonnella TE 13 3734 144690
Torano Nuovo TE 13 1611 146301
Montedinove AP 13 488 146789
Montefiore dell'Aso AP 13 2123 148912
Corropoli TE 14 5045 153957
Nereto TE 14 5242 159199
Massignano AP 14 1638 160837
Cupra Marittima AP 14 5398 166235
Rotella AP 15 906 167141
Folignano AP 15 9241 176382
Ortezzano FM 15 774 177156
Martinsicuro TE 15 16033 193189
Monte Vidon Combatte FM 16 433 193622
Ascoli Piceno AP 16 49407 243029
Petritoli FM 16 2335 245364
Monte Rinaldo FM 17 379 245743
Sant'Omero TE 17 5243 250986
Monterubbiano FM 17 2230 253216
Moresco FM 17 598 253814
Campofilone FM 18 1916 255730
Alba Adriatica TE 18 12353 268083
Civitella del Tronto TE 19 5116 273199
Montelparo FM 19 778 273977
Montottone FM 19 979 274956
Monte Giberto FM 20 801 275757
Altidona FM 20 3390 279147
Ponzano di Fermo FM 20 1674 280821
Lapedona FM 20 1166 281987

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km N of Teramo (54892 inhabitants)
57 Km NW of Montesilvano (53738 inhabitants)
65 Km NW of Pescara (121014 inhabitants)
70 Km NE of L'Aquila (69753 inhabitants)
74 Km NW of Chieti (51815 inhabitants)
78 Km S of Ancona (100861 inhabitants)
84 Km E of Foligno (57155 inhabitants)
98 Km E of Terni (111501 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 2.1 		2010-09-20
16:21:54		 42.933 13.739 11 2014-10-21
12:27:13		 Bollettino Sismico Italiano INGV 1116939
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2010-09-20 16:21:54 ± 0.14
Latitude 42.9330 ± 0.0081
Longitude 13.7390 ± 0.0098
Depth (km) 11 (operator assigned)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1116939

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1105
Semi-minor axis of confidence ellipse (meter) 579
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 37
Circular confidence region, given by single value of horizontal uncertainty (meter) 1204.2
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 207
Number of associated phases, regardless of their use for origin computation 35
Number of defining phases 25
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) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 1.46949
Number of stations at which the event was observed 26
Number of stations from which data was used for origin computation 19
Magnitudes information

ML:2.1

Field Value
Value 2.1
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 1116939
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 21:38:49

Md:2.6

Field Value
Value 2.6
Uncertainty 0.2
Num. used stations
Type of magnitude Md
Reference to an origin 1116939
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 21:38:49
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.PARC.HHZ. 2010-09-20T16:22:40.45 10.0 undecidable manual Sg 0 0 0
IV.ATFO.HHZ. 2010-09-20T16:22:29.15 10.0 undecidable manual Sg 0 0 0
IV.CRE.HHZ. 2010-09-20T16:22:22.15 0.3 undecidable manual Pg 298 163.1145 1.013 40
IV.FAGN.HHE. 2010-09-20T16:22:20.79 10.0 undecidable manual Sg 0 0 0
IV.PARC.HHZ. 2010-09-20T16:22:20.79 10.0 undecidable manual Pg 0 0 0
IV.SNTG.HHZ. 2010-09-20T16:22:17.21 0.6 undecidable manual Sg 299 73.8705 0.468 42
IV.BADI.EHZ. 2010-09-20T16:22:17.25 0.3 undecidable manual Pg 298 136.6632 0.194 59
IV.CESI.HHZ. 2010-09-20T16:22:16.18 0.6 undecidable manual Sg 277 68.1762 0.952 35
IV.VCEL.EHE. 2010-09-20T16:22:15.22 10.0 undecidable manual Pg 0 0 0
IV.CING.HHN. 2010-09-20T16:22:15.19 10.0 undecidable manual Pg 0 0 0
IV.ATPI.EHZ. 2010-09-20T16:22:14.54 0.6 undecidable manual Pg 298 122.3886 -0.314 40
IV.FSSB.SHZ. 2010-09-20T16:22:14.11 10.0 undecidable manual Pg 0 0 0
IV.ATVO.HHN. 2010-09-20T16:22:14.11 0.3 undecidable manual Pg 295 118.6923 -0.181 62
IV.ATPC.HHE. 2010-09-20T16:22:14.77 0.6 undecidable manual Pg 301 120.0909 0.266 40
IV.ATFO.HHZ. 2010-09-20T16:22:14.50 10.0 undecidable manual Pg 0 0 0
IV.FAGN.HHE. 2010-09-20T16:22:12.97 10.0 undecidable manual Pg 0 0 0
IV.MNS.HHZ. 2010-09-20T16:22:12.38 0.3 undecidable manual Pg 235 105.5166 0.121 64
IV.MURB.HHZ. 2010-09-20T16:22:11.96 0.3 undecidable manual Pg 291 104.9172 -0.202 64
IV.FDMO.HHZ. 2010-09-20T16:22:11.53 0.6 undecidable manual Sg 282 54.1014 0.062 48
IV.SMA1.EHZ. 2010-09-20T16:22:10.02 0.6 undecidable manual Sg 224 47.0196 0.446 45
IV.ARVD.HHZ. 2010-09-20T16:22:09.81 0.3 undecidable manual Pg 314 89.8434 -0.035 68
IV.TERO.HHN. 2010-09-20T16:22:07.53 0.3 undecidable manual Sg 198 36.1416 0.847 59
IV.GUMA.HHE. 2010-09-20T16:22:07.32 0.3 undecidable manual Sg 294 35.742 0.748 61
IV.AOI.HHE. 2010-09-20T16:22:07.17 0.3 undecidable manual Pg 351 69.2751 0.498 63
IV.CESI.HHZ. 2010-09-20T16:22:06.11 0.1 undecidable manual Pg 277 68.1762 -0.39 88
IV.SNTG.HHZ. 2010-09-20T16:22:06.79 0.1 undecidable manual Pg 299 73.8705 -0.585 82
IV.LNSS.HHZ. 2010-09-20T16:22:06.04 0.3 undecidable manual Pg 237 67.6767 -0.383 66
IV.TRTR.HHN. 2010-09-20T16:22:05.65 10.0 undecidable manual Pg 0 0 0
IV.RM33.EHN. 2010-09-20T16:22:05.25 0.3 undecidable manual Pg 222 63.5919 -0.541 64
IV.RM32.EHZ. 2010-09-20T16:22:04.10 0.3 undecidable manual Pg 222 54.6009 -0.313 68
IV.RM29.EHZ. 2010-09-20T16:22:04.96 0.3 undecidable manual Pg 226 59.7957 -0.24 69
IV.FDMO.HHZ. 2010-09-20T16:22:03.85 0.1 undecidable manual Pg 282 54.1014 -0.477 88
IV.SMA1.EHZ. 2010-09-20T16:22:02.98 0.1 undecidable manual Pg 224 47.0196 -0.254 94
IV.GUMA.HHE. 2010-09-20T16:22:01.50 0.1 negative manual Pg 294 35.742 -0.002 100
IV.TERO.HHN. 2010-09-20T16:22:01.69 0.1 undecidable manual Pg 198 36.1416 0.125 98
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
Waveforms Seismic signals in miniseed + resp format Download