Earthquake with magnitude of ML 0.7 on date 31-12-2010 and time 00:56:31 (Italy) in region 3 km S Norcia (PG)

A magnitude ML 0.7 earthquake occured in region: 3 km S Norcia (PG), on

  • 30-12-2010 23:56:31 (UTC)
  • 31-12-2010 00:56:31 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.7680, 13.0850 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
Norcia PG 3 4957 4957
Cascia PG 8 3217 8174
Preci PG 13 724 8898
Poggiodomo PG 14 117 9015
Cerreto di Spoleto PG 15 1075 10090
Castelsantangelo sul Nera MC 15 281 10371
Accumoli RI 16 667 11038
Monteleone di Spoleto PG 17 599 11637
Arquata del Tronto AP 17 1178 12815
Cittareale RI 18 482 13297
Vallo di Nera PG 18 364 13661
Visso MC 18 1107 14768
Sellano PG 19 1079 15847

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km SE of Foligno (57155 inhabitants)
43 Km NE of Terni (111501 inhabitants)
52 Km W of Teramo (54892 inhabitants)
53 Km NW of L'Aquila (69753 inhabitants)
68 Km SE of Perugia (166134 inhabitants)
89 Km E of Viterbo (67173 inhabitants)
90 Km NE of Guidonia Montecelio (88673 inhabitants)
92 Km W of Montesilvano (53738 inhabitants)
92 Km N of Tivoli (56533 inhabitants)
98 Km W of Pescara (121014 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 1.8
ML 0.7
2010-12-30
23:56:31
42.768 13.085 11 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 1155479
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2010-12-30 23:56:31 ± 0.04
Latitude 42.7680 ± 0.0018
Longitude 13.0850 ± 0.0037
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1155479

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 366
Semi-minor axis of confidence ellipse (meter) 151
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 257
Circular confidence region, given by single value of horizontal uncertainty (meter) 360.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 140
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) 0.1
Epicentral distance of station closest to the epicenter (degree) 0.06925
Epicentral distance of station farthest from the epicenter (degree) 0.27160
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 4
Magnitudes information

ML:0.7

Field Value
Value 0.7
Uncertainty 0.3
Num. used stations
Type of magnitude ML
Reference to an origin 1155479
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 22:29:11

Md:1.8

Field Value
Value 1.8
Uncertainty 0.1
Num. used stations
Type of magnitude Md
Reference to an origin 1155479
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 22:29:11
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.CESI.HHE. 2010-12-30T23:56:42.20 0.3 undecidable manual Sg 331 30.1476 -0.06 97
IV.SMA1.EHZ. 2010-12-30T23:56:41.03 0.3 undecidable manual Sg 127 25.4523 0.017 98
IV.LNSS.HHN. 2010-12-30T23:56:39.18 0.3 undecidable manual Sg 191 18.6702 0.004 100
IV.CESI.HHE. 2010-12-30T23:56:37.88 0.3 undecidable manual Pg 331 30.1476 0.083 96
IV.SMA1.EHZ. 2010-12-30T23:56:37.04 0.3 undecidable manual Pg 127 25.4523 -0.04 98
IV.NRCA.HHN. 2010-12-30T23:56:36.23 0.3 undecidable manual Sg 18 7.6812 -0.085 100
IV.LNSS.HHN. 2010-12-30T23:56:35.99 0.3 undecidable manual Pg 191 18.6702 -0.025 99
IV.NRCA.HHN. 2010-12-30T23:56:34.50 0.3 undecidable manual Pg 18 7.6812 0.136 99
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