Earthquake with magnitude of ML 0.9 on date 06-12-2021 and time 00:15:41 (UTC) in region 5 km W Roccafluvione (AP)

A magnitude ML 0.9 earthquake occured in region: 5 km W Roccafluvione (AP), on

  • 06-12-2021 00:15:41 (UTC)
  • 06-12-2021 01:15:41 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.841, 13.425 at 19 km depth.

The earthquake was located by: Sala Sismica INGV-Roma.

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
Roccafluvione AP 5 2010 2010
Palmiano AP 7 196 2206
Venarotta AP 7 2066 4272
Montegallo AP 7 523 4795
Acquasanta Terme AP 8 2916 7711
Montemonaco AP 10 604 8315
Ascoli Piceno AP 13 49407 57722
Arquata del Tronto AP 13 1178 58900
Valle Castellana TE 13 977 59877
Comunanza AP 13 3166 63043
Montefortino FM 13 1178 64221
Force AP 15 1354 65575
Amandola FM 17 3629 69204
Montefalcone Appennino FM 17 424 69628
Rotella AP 17 906 70534
Folignano AP 17 9241 79775
Smerillo FM 18 365 80140
Rocca Santa Maria TE 19 537 80677
Castignano AP 19 2796 83473
Montedinove AP 20 488 83961

Municipalities with at least 50000 inhabitants

An earthquake occurred to
31 Km NW of Teramo (54892 inhabitants)
54 Km N of L'Aquila (69753 inhabitants)
60 Km E of Foligno (57155 inhabitants)
70 Km NW of Montesilvano (53738 inhabitants)
71 Km E of Terni (111501 inhabitants)
77 Km NW of Pescara (121014 inhabitants)
82 Km NW of Chieti (51815 inhabitants)
87 Km S of Ancona (100861 inhabitants)
89 Km E of Perugia (166134 inhabitants)
Recent and historical seismicity
Seismic hazard
Shakemap
Felt maps
Preliminary map of the earthquake effects from the web questionnaire

Preliminary map of the earthquake effects from the web questionnaire

This map shows the distribution of earthquake resentment in the area, expressed in terms of intensity on the MCS scale (Mercalli-Cancani-Sieberg). Intensities are determined using data from questionnaires collected on the website http://www.hsit.it. The intensities shown are determined considering all the reports received from each municipality, and are all the more reliable the greater the number of questionnaires. The collected data are subjected to an automatic statistical filter, but are not checked individually. In particular, intensities greater than or equal to the VI degree of the MCS or EMS scale require on-site verification by specialized personnel. The black star is the epicenter of the earthquake that occurred. This map is updated every time citizens fill out new questionnaires. The number of questionnaires processed to obtain this map, the date and time of the last update are shown at the top right.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Reviewed
Rev100
ML 0.9 2021-12-06
00:15:41
42.8412 13.4247 19 2021-12-06
00:43:30
Sala Sismica INGV-Roma 98196021
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-06 00:15:41 ± 0.14
Latitude 42.8412 ± 0.0063
Longitude 13.4247 ± 0.0074
Depth (km) 19 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98196021

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 692
Semi-minor axis of confidence ellipse (meter) 342
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 146
Circular confidence region, given by single value of horizontal uncertainty (meter) 690
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 258
Number of associated phases, regardless of their use for origin computation 12
Number of defining phases 11
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.12
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.34084
Number of stations at which the event was observed 7
Number of stations from which data was used for origin computation 6
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 4
Type of magnitude ML
Reference to an origin 98196021
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-06 00:43:30
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MGAB.HHZ. 2021-12-06T00:16:00.37 3.0 negative manual P 0.02 0
IV.CSP1.EHZ. 2021-12-06T00:15:53.35 0.3 undecidable manual S 327 0.2977 109 0.07 73
IV.FDMO.HHZ. 2021-12-06T00:15:53.61 0.3 undecidable manual S 308 0.3148 108 -0.14 72
IV.NRCA.HHZ. 2021-12-06T00:15:51.32 0.3 undecidable manual S 268 0.2275 117 -0.04 74
IV.MC2.EHZ. 2021-12-06T00:15:50.38 0.3 undecidable manual S 292 0.1862 123 0.08 75
IV.MF5.EHZ. 2021-12-06T00:15:49.29 0.3 undecidable manual S 10 0.1493 131 -0.13 75
IV.CSP1.EHZ. 2021-12-06T00:15:48.53 0.3 undecidable manual P 327 0.2977 109 0.17 71
IV.PF6.EHE. 2021-12-06T00:15:48.82 0.6 undecidable manual P 331 0.3408 106 -0.25 47
IV.FDMO.HHZ. 2021-12-06T00:15:48.56 0.1 undecidable manual P 308 0.3148 108 -0.08 98
IV.NRCA.HHZ. 2021-12-06T00:15:47.29 0.1 undecidable manual P 268 0.2275 117 0.04 100
IV.MF5.EHZ. 2021-12-06T00:15:46.19 0.1 undecidable manual P 10 0.1493 131 0.06 100
IV.MC2.EHZ. 2021-12-06T00:15:46.70 0.1 undecidable manual P 292 0.1862 123 0.05 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MC2.EHE. ML:0.9 4.29499E-5 0.1 AML other m 2021-12-06T00:15:50.83
IV.MC2.EHN. ML:0.9 4.434018E-5 0.1 AML other m 2021-12-06T00:15:50.51
IV.NRCA.HHE. ML:1 4.5231355E-5 0.2 AML other m 2021-12-06T00:15:51.55
IV.NRCA.HHN. ML:0.8 3.0028591E-5 0.1 AML other m 2021-12-06T00:15:52.90
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