Earthquake with magnitude of ML 1.2 on date 06-12-2021 and time 01:43:40 (Italy) in region 6 km W Roccafluvione (AP)

A magnitude ML 1.2 earthquake occured in region: 6 km W Roccafluvione (AP), on

  • 06-12-2021 00:43:40 (UTC)
  • 06-12-2021 01:43:40 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.844, 13.409 at 11 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 6 2010 2010
Montegallo AP 6 523 2533
Palmiano AP 8 196 2729
Venarotta AP 8 2066 4795
Acquasanta Terme AP 8 2916 7711
Montemonaco AP 9 604 8315
Arquata del Tronto AP 12 1178 9493
Montefortino FM 12 1178 10671
Comunanza AP 13 3166 13837
Ascoli Piceno AP 14 49407 63244
Valle Castellana TE 14 977 64221
Force AP 15 1354 65575
Amandola FM 16 3629 69204
Montefalcone Appennino FM 17 424 69628
Rotella AP 18 906 70534
Smerillo FM 18 365 70899
Folignano AP 19 9241 80140
Rocca Santa Maria TE 20 537 80677

Municipalities with at least 50000 inhabitants

An earthquake occurred to
32 Km NW of Teramo (54892 inhabitants)
55 Km N of L'Aquila (69753 inhabitants)
59 Km E of Foligno (57155 inhabitants)
70 Km E of Terni (111501 inhabitants)
71 Km NW of Montesilvano (53738 inhabitants)
78 Km NW of Pescara (121014 inhabitants)
83 Km NW of Chieti (51815 inhabitants)
87 Km S of Ancona (100861 inhabitants)
88 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 1.2 2021-12-06
00:43:40
42.8435 13.4088 11 2021-12-06
00:51:53
Sala Sismica INGV-Roma 98196461
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-06 00:43:40 ± 0.09
Latitude 42.8435 ± 0.0036
Longitude 13.4088 ± 0.0123
Depth (km) 11 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98196461

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 989
Semi-minor axis of confidence ellipse (meter) 348
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 99
Circular confidence region, given by single value of horizontal uncertainty (meter) 990
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 154
Number of associated phases, regardless of their use for origin computation 22
Number of defining phases 21
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.26
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.5351
Number of stations at which the event was observed 12
Number of stations from which data was used for origin computation 11
Magnitude information

ML:1.2

Field Value
Value 1.2
Uncertainty 0.2
Num. used stations 10
Type of magnitude ML
Reference to an origin 98196461
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-06 00:51:53
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.ATFO.HHZ. 2021-12-06T00:44:09.59 3.0 undecidable manual S 0.13 0
IV.EL6.EHZ. 2021-12-06T00:43:59.64 0.3 undecidable manual S 335 0.5351 50 0.53 61
IV.LNSS.HHZ. 2021-12-06T00:43:54.45 0.3 undecidable manual S 228 0.3615 50 0.46 64
IV.FDMO.HHZ. 2021-12-06T00:43:52.02 0.3 undecidable manual S 309 0.304 50 -0.26 68
IV.EL6.EHZ. 2021-12-06T00:43:51.23 0.3 undecidable manual P 335 0.5351 50 -0.11 67
IV.CSP1.EHZ. 2021-12-06T00:43:51.81 0.3 undecidable manual S 329 0.2896 50 -0.03 72
IV.GUMA.HHZ. 2021-12-06T00:43:50.29 0.3 undecidable manual S 346 0.2257 50 0.34 68
IV.SMA1.EHZ. 2021-12-06T00:43:49.64 0.3 undecidable manual S 194 0.2194 50 -0.13 72
IV.NRCA.HHZ. 2021-12-06T00:43:49.76 0.3 undecidable manual S 267 0.2158 50 0.09 72
IV.LNSS.HHZ. 2021-12-06T00:43:48.53 0.3 undecidable manual P 228 0.3615 50 0.14 69
IV.MC2.EHZ. 2021-12-06T00:43:48.80 0.3 undecidable manual S 293 0.1745 119 0.37 68
IV.MNTT.EHZ. 2021-12-06T00:43:47.04 0.3 undecidable manual P 32 0.2572 50 0.44 66
IV.MF5.EHZ. 2021-12-06T00:43:47.69 0.3 undecidable manual S 14 0.1493 123 0.11 73
IV.CSP1.EHZ. 2021-12-06T00:43:46.71 0.1 undecidable manual P 329 0.2896 50 -0.44 88
IV.FDMO.HHZ. 2021-12-06T00:43:46.97 0.1 undecidable manual P 309 0.304 50 -0.43 88
IV.MC2.EHZ. 2021-12-06T00:43:45.10 0.1 undecidable manual P 293 0.1745 119 -0.08 97
IV.MTRA.EHZ. 2021-12-06T00:43:45.99 0.3 undecidable manual S 186 0.0872 138 0.24 72
IV.SMA1.EHZ. 2021-12-06T00:43:45.74 0.1 undecidable manual P 194 0.2194 50 -0.21 94
IV.NRCA.HHZ. 2021-12-06T00:43:45.69 0.1 undecidable manual P 267 0.2158 50 -0.2 94
IV.GUMA.HHZ. 2021-12-06T00:43:45.89 0.1 undecidable manual P 346 0.2257 50 -0.16 95
IV.MF5.EHZ. 2021-12-06T00:43:44.60 0.1 undecidable manual P 14 0.1493 123 -0.08 97
IV.MTRA.EHZ. 2021-12-06T00:43:43.66 0.1 undecidable manual P 186 0.0872 138 0.03 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.MTRA.EHE. ML:1.3 0.0002555 0.16 AML other m 2021-12-06T00:43:46.05
IV.MTRA.EHN. ML:1 0.0001265 0.26 AML other m 2021-12-06T00:43:46.17
IV.MC2.EHE. ML:1.3 0.0001515 1.72 AML other m 2021-12-06T00:43:48.02
IV.NRCA.HHE. ML:1.3 0.000113 0.2 AML other m 2021-12-06T00:43:49.87
IV.NRCA.HHN. ML:1.1 7.69E-5 1.92 AML other m 2021-12-06T00:43:50.98
IV.MC2.EHN. ML:1.3 0.0001413 1.14 AML other m 2021-12-06T00:43:50.66
IV.MTRA.HNE. ML:1.3 0.00025089447 0.16 AML other m 2021-12-06T00:43:46.04
IV.MTRA.HNN. ML:1 0.000117819715 0.08 AML other m 2021-12-06T00:43:46.16
IV.CSP1.EHE. ML:1.3 8.482083E-5 0.36 AML other m 2021-12-06T00:43:52.05
IV.LNSS.HHE. ML:0.9 2.7127656E-5 0.1 AML other m 2021-12-06T00:43:55.02
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