Earthquake with magnitude of ML 1.0 on date 21-11-2021 and time 12:55:50 (UTC) in region 5 km NE Cittareale (RI)

A magnitude ML 1.0 earthquake occured in region: 5 km NE Cittareale (RI), on

  • 21-11-2021 12:55:50 (UTC)
  • 21-11-2021 13:55:50 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.654, 13.19 at 14 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
Cittareale RI 5 482 482
Accumoli RI 7 667 1149
Amatrice RI 9 2657 3806
Montereale AQ 15 2581 6387
Arquata del Tronto AP 16 1178 7565
Cascia PG 16 3217 10782
Posta RI 16 694 11476
Borbona RI 16 617 12093
Capitignano AQ 17 665 12758
Norcia PG 17 4957 17715
Campotosto AQ 18 542 18257
Monteleone di Spoleto PG 20 599 18856

Municipalities with at least 50000 inhabitants

An earthquake occurred to
38 Km NW of L'Aquila (69753 inhabitants)
42 Km W of Teramo (54892 inhabitants)
46 Km E of Terni (111501 inhabitants)
52 Km SE of Foligno (57155 inhabitants)
80 Km W of Montesilvano (53738 inhabitants)
82 Km NE of Guidonia Montecelio (88673 inhabitants)
83 Km SE of Perugia (166134 inhabitants)
83 Km NE of Tivoli (56533 inhabitants)
86 Km W of Pescara (121014 inhabitants)
87 Km W of Chieti (51815 inhabitants)
93 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 1.0 2021-11-21
12:55:50
42.6537 13.1905 14 2021-11-21
13:00:28
Sala Sismica INGV-Roma 97658131
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-21 12:55:50 ± 0.14
Latitude 42.6537 ± 0.0045
Longitude 13.1905 ± 0.0049
Depth (km) 14 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97658131

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 489
Semi-minor axis of confidence ellipse (meter) 127
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 172
Circular confidence region, given by single value of horizontal uncertainty (meter) 490
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 73
Number of associated phases, regardless of their use for origin computation 15
Number of defining phases 14
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.14
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.30577
Number of stations at which the event was observed 8
Number of stations from which data was used for origin computation 7
Magnitude information

ML:1

Field Value
Value 1
Uncertainty 0.2
Num. used stations 12
Type of magnitude ML
Reference to an origin 97658131
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-21 13:00:28
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.TERO.HHZ. 2021-11-21T12:56:01.75 0.6 undecidable manual S 96 0.3058 99 -0.29 46
IV.GAVE.EHZ. 2021-11-21T12:55:59.53 0.6 undecidable manual S 280 0.2212 105 -0.06 48
IV.MTRA.EHZ. 2021-11-21T12:55:58.44 0.6 undecidable manual S 56 0.1826 111 -0.08 49
IV.NRCA.HHZ. 2021-11-21T12:55:58.43 0.6 undecidable manual S 343 0.188 110 -0.24 47
IV.RM33.EHZ. 2021-11-21T12:55:57.29 0.6 undecidable manual S 173 0.1457 119 -0.23 48
IV.TERO.HHZ. 2021-11-21T12:55:57.12 0.1 undecidable manual P 96 0.3058 99 -0.03 97
IV.SMA1.EHZ. 2021-11-21T12:55:56.80 0.6 undecidable manual S 102 0.1088 130 0.18 49
IV.MF5.EHZ. 2021-11-21T12:55:56.74 3.0 negative manual P -1.95 0
IV.LNSS.HHZ. 2021-11-21T12:55:56.78 0.6 undecidable manual S 245 0.1214 126 -0.13 49
IV.MTRA.EHZ. 2021-11-21T12:55:55.23 0.1 undecidable manual P 56 0.1826 111 0.11 98
IV.NRCA.HHZ. 2021-11-21T12:55:55.31 1.0 positive manual P 343 0.188 110 0.11 25
IV.GAVE.EHZ. 2021-11-21T12:55:55.82 0.3 positive manual P 280 0.2212 105 0.08 74
IV.LNSS.HHZ. 2021-11-21T12:55:54.27 0.1 positive manual P 245 0.1214 126 0.08 100
IV.SMA1.EHZ. 2021-11-21T12:55:54.29 0.3 positive manual P 102 0.1088 130 0.27 72
IV.RM33.EHZ. 2021-11-21T12:55:54.61 1.0 negative manual P 173 0.1457 119 0.07 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.SMA1.EHE. ML:1.4 0.0002165 0.3 AML other m 2021-11-21T12:55:57.21
IV.LNSS.HHE. ML:1.2 0.0001285 1.56 AML other m 2021-11-21T12:55:57.14
IV.LNSS.HHN. ML:1.2 0.0001315 1.3 AML other m 2021-11-21T12:55:57.32
IV.RM33.EHE. ML:0.8 4.38E-5 0.26 AML other m 2021-11-21T12:55:57.59
IV.RM33.EHN. ML:0.8 5.185E-5 0.24 AML other m 2021-11-21T12:55:57.55
IV.SMA1.EHN. ML:1 9.785E-5 0.5 AML other m 2021-11-21T12:55:57.77
IV.MTRA.EHN. ML:0.9 4.905E-5 0.18 AML other m 2021-11-21T12:55:58.58
IV.NRCA.HHE. ML:1 6.52E-5 0.14 AML other m 2021-11-21T12:55:58.63
IV.NRCA.HHN. ML:0.7 3.175E-5 0.36 AML other m 2021-11-21T12:55:58.72
IV.MTRA.EHE. ML:0.8 4.265E-5 0.46 AML other m 2021-11-21T12:55:59.59
IV.GAVE.EHE. ML:1 5.5187745E-5 0.1216 AML other m 2021-11-21T12:56:00.21
IV.GAVE.EHN. ML:0.9 4.52029545E-5 0.2816 AML other m 2021-11-21T12:55:59.81
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