Earthquake with magnitude of ML 0.1 on date 22-04-2011 and time 02:16:21 (Italy) in region 3 km N Montereale (AQ)

A magnitude ML 0.1 earthquake occured in region: 3 km N Montereale (AQ), on

  • 22-04-2011 00:16:21 (UTC)
  • 22-04-2011 02:16:21 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.5510, 13.2520 at 6 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
Montereale AQ 3 2581 2581
Capitignano AQ 5 665 3246
Amatrice RI 9 2657 5903
Campotosto AQ 10 542 6445
Cagnano Amiterno AQ 10 1369 7814
Cittareale RI 11 482 8296
Borbona RI 11 617 8913
Barete AQ 11 737 9650
Posta RI 13 694 10344
Pizzoli AQ 13 4326 14670
Accumoli RI 16 667 15337
Crognaleto TE 19 1297 16634
Micigliano RI 20 127 16761
Scoppito AQ 20 3727 20488

Municipalities with at least 50000 inhabitants

An earthquake occurred to
25 Km NW of L'Aquila (69753 inhabitants)
39 Km W of Teramo (54892 inhabitants)
50 Km E of Terni (111501 inhabitants)
64 Km SE of Foligno (57155 inhabitants)
74 Km W of Montesilvano (53738 inhabitants)
75 Km NE of Guidonia Montecelio (88673 inhabitants)
75 Km NE of Tivoli (56533 inhabitants)
78 Km W of Chieti (51815 inhabitants)
80 Km W of Pescara (121014 inhabitants)
94 Km SE of Perugia (166134 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
97 Km NE of Roma (2864731 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 1.0
ML 0.1
2011-04-22
00:16:21
42.551 13.252 6 2014-10-21
12:27:13
Bollettino Sismico Italiano INGV 1199919
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2011-04-22 00:16:21 ± 0.12
Latitude 42.5510 ± 0.0063
Longitude 13.2520 ± 0.0037
Depth (km) 6 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-SISPICK
Event type earthquake
Origin ID 1199919

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 709
Semi-minor axis of confidence ellipse (meter) 99
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 160
Circular confidence region, given by single value of horizontal uncertainty (meter) 761.6
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 226
Number of associated phases, regardless of their use for origin computation 7
Number of defining phases 6
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.08
Epicentral distance of station closest to the epicenter (degree) 0.00000
Epicentral distance of station farthest from the epicenter (degree) 0.09982
Number of stations at which the event was observed 4
Number of stations from which data was used for origin computation 3
Magnitudes information

ML:0.1

Field Value
Value 0.1
Uncertainty 0.0
Num. used stations
Type of magnitude ML
Reference to an origin 1199919
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 23:28:31

Md:1.0

Field Value
Value 1.0
Uncertainty 0.1
Num. used stations
Type of magnitude Md
Reference to an origin 1199919
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2013-01-05 23:28:31
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance(km) Takeoff_angle Residual Weight
IV.SMA1.EHN. 2011-04-22T00:16:25.51 0.3 undecidable manual Sg 38 11.0778 0.048 73
IV.SMA1.EHN. 2011-04-22T00:16:23.53 0.1 undecidable manual Pg 38 11.0778 -0.063 98
IV.RM29.EHE. 2011-04-22T00:16:23.65 0.1 undecidable manual Sg 284 4.1958 0.003 100
IV.RM32.EHZ. 2011-04-22T00:16:23.57 0.1 undecidable manual Sg 58 3.996 -0.039 99
IV.RM29.EHE. 2011-04-22T00:16:22.54 0.1 undecidable manual Pg 284 4.1958 -0.005 100
IV.RM32.EHZ. 2011-04-22T00:16:22.59 0.1 undecidable manual Pg 58 3.996 0.067 99
IV.FIR.HHE. 2011-04-22T00:16:14.34 10.0 undecidable manual Pg 0 0 0
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