Earthquake with magnitude of ML 0.9 on date 07-12-2021 and time 02:01:13 (UTC) in region 3 km S Accumoli (RI)

A magnitude ML 0.9 earthquake occured in region: 3 km S Accumoli (RI), on

  • 07-12-2021 02:01:13 (UTC)
  • 07-12-2021 03:01:13 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.668, 13.253 at 10 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
Accumoli RI 3 667 667
Amatrice RI 5 2657 3324
Cittareale RI 9 482 3806
Arquata del Tronto AP 12 1178 4984
Campotosto AQ 16 542 5526
Montereale AQ 16 2581 8107
Capitignano AQ 17 665 8772
Acquasanta Terme AP 17 2916 11688
Norcia PG 19 4957 16645
Borbona RI 20 617 17262

Municipalities with at least 50000 inhabitants

An earthquake occurred to
37 Km W of Teramo (54892 inhabitants)
37 Km NW of L'Aquila (69753 inhabitants)
51 Km E of Terni (111501 inhabitants)
55 Km SE of Foligno (57155 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
82 Km W of Pescara (121014 inhabitants)
83 Km W of Chieti (51815 inhabitants)
86 Km SE of Perugia (166134 inhabitants)
86 Km NE of Guidonia Montecelio (88673 inhabitants)
87 Km NE of Tivoli (56533 inhabitants)
98 Km E of Viterbo (67173 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 2021-12-07
02:01:13
42.6683 13.253 10 2021-12-07
02:11:17
Sala Sismica INGV-Roma 98224451
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-12-07 02:01:13 ± 0.11
Latitude 42.6683 ± 0.0063
Longitude 13.2530 ± 0.0073
Depth (km) 10 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 98224451

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 680
Semi-minor axis of confidence ellipse (meter) 599
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 206
Circular confidence region, given by single value of horizontal uncertainty (meter) 680
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 108
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 15
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.35
Epicentral distance of station closest to the epicenter (degree) 0.07105
Epicentral distance of station farthest from the epicenter (degree) 0.35343
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 8
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.1
Num. used stations 11
Type of magnitude ML
Reference to an origin 98224451
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-12-07 02:11:17
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.MF5.EHE. 2021-12-07T02:01:27.21 0.1 undecidable manual S 25 0.3534 50 0.85 75
IV.TERO.HHZ. 2021-12-07T02:01:23.05 0.1 undecidable manual S 100 0.2617 50 -0.6 85
IV.MC2.EHZ. 2021-12-07T02:01:23.12 0.1 undecidable manual S 349 0.2473 50 -0.1 97
IV.NRCA.HHZ. 2021-12-07T02:01:21.06 0.1 undecidable manual S 328 0.1943 115 -0.41 92
IV.MF5.EHE. 2021-12-07T02:01:21.10 0.1 undecidable manual P 25 0.3534 50 0.3 91
IV.LNSS.HHZ. 2021-12-07T02:01:20.66 0.1 undecidable manual S 247 0.1691 118 0.03 100
IV.MTRA.EHZ. 2021-12-07T02:01:19.36 0.1 undecidable manual S 50 0.1376 124 -0.21 97
IV.TERO.HHZ. 2021-12-07T02:01:18.96 0.1 undecidable manual P 100 0.2617 50 -0.28 93
IV.MC2.EHZ. 2021-12-07T02:01:18.97 1.0 positive manual P 349 0.2473 50 -0.02 25
IV.LNSS.HHZ. 2021-12-07T02:01:17.57 0.1 positive manual P 247 0.1691 118 0.07 99
IV.CAMP.HHE. 2021-12-07T02:01:17.60 0.1 undecidable manual P 139 0.1754 118 -0.01 100
IV.SMA1.EHZ. 2021-12-07T02:01:17.84 0.1 undecidable manual S 122 0.071 142 0.16 99
IV.NRCA.HHZ. 2021-12-07T02:01:17.87 0.1 undecidable manual P 328 0.1943 115 -0.11 98
IV.SMA1.EHZ. 2021-12-07T02:01:16.14 0.1 undecidable manual P 122 0.071 142 0.35 95
IV.MTRA.EHZ. 2021-12-07T02:01:16.95 0.1 undecidable manual P 50 0.1376 124 0.06 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:0.9 0.000119047015 0.3808 AML other m 2021-12-07T02:01:18.01
IV.SMA1.EHN. ML:0.9 0.00011851755 0.24 AML other m 2021-12-07T02:01:18.47
IV.MTRA.HNE. ML:1.1 0.000118232875 0.52 AML other m 2021-12-07T02:01:20.25
IV.MTRA.EHE. ML:0.9 7.2440505E-5 0.12 AML other m 2021-12-07T02:01:19.43
IV.MTRA.EHN. ML:0.7 5.1635665E-5 0.24 AML other m 2021-12-07T02:01:20.16
IV.LNSS.HHE. ML:0.8 4.335649E-5 0.2208 AML other m 2021-12-07T02:01:21.64
IV.LNSS.HHN. ML:0.9 6.297585E-5 0.2592 AML other m 2021-12-07T02:01:20.90
IV.NRCA.HNE. ML:0.9 5.5623985E-5 0.1712 AML other m 2021-12-07T02:01:21.36
IV.NRCA.HHE. ML:0.9 5.0573925E-5 0.16 AML other m 2021-12-07T02:01:21.45
IV.NRCA.HHN. ML:0.8 3.883565E-5 0.0592 AML other m 2021-12-07T02:01:21.53
IV.TERO.HHN. ML:1 4.879011E-5 0.08 AML other m 2021-12-07T02:01:23.92
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