Earthquake with magnitude of ML 0.9 on date 21-11-2021 and time 16:32:49 (UTC) in region 5 km E Norcia (PG)

A magnitude ML 0.9 earthquake occured in region: 5 km E Norcia (PG), on

  • 21-11-2021 16:32:49 (UTC)
  • 21-11-2021 17:32:49 (UTC +01:00) Italian time

and geographic coordinates (lat, lon) 42.808, 13.149 at 13 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
Norcia PG 5 4957 4957
Castelsantangelo sul Nera MC 10 281 5238
Preci PG 12 724 5962
Arquata del Tronto AP 13 1178 7140
Visso MC 15 1107 8247
Cascia PG 15 3217 11464
Accumoli RI 15 667 12131
Ussita MC 15 444 12575
Montegallo AP 16 523 13098
Montemonaco AP 18 604 13702
Cerreto di Spoleto PG 19 1075 14777

Municipalities with at least 50000 inhabitants

An earthquake occurred to
40 Km E of Foligno (57155 inhabitants)
48 Km W of Teramo (54892 inhabitants)
49 Km NE of Terni (111501 inhabitants)
55 Km NW of L'Aquila (69753 inhabitants)
70 Km E of Perugia (166134 inhabitants)
88 Km W of Montesilvano (53738 inhabitants)
95 Km SW of Ancona (100861 inhabitants)
95 Km W of Pescara (121014 inhabitants)
96 Km E of Viterbo (67173 inhabitants)
96 Km NE of Guidonia Montecelio (88673 inhabitants)
98 Km NW of Chieti (51815 inhabitants)
98 Km NE of Tivoli (56533 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 2021-11-21
16:32:49
42.8082 13.1492 13 2021-11-21
16:39:14
Sala Sismica INGV-Roma 97661351
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-11-21 16:32:49 ± 0.06
Latitude 42.8082 ± 0.0036
Longitude 13.1492 ± 0.0061
Depth (km) 13 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 97661351

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 504
Semi-minor axis of confidence ellipse (meter) 167
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 263
Circular confidence region, given by single value of horizontal uncertainty (meter) 500
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 114
Number of associated phases, regardless of their use for origin computation 27
Number of defining phases 25
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.18
Epicentral distance of station closest to the epicenter (degree) 0
Epicentral distance of station farthest from the epicenter (degree) 0.33275
Number of stations at which the event was observed 16
Number of stations from which data was used for origin computation 14
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.3
Num. used stations 20
Type of magnitude ML
Reference to an origin 97661351
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-11-21 16:39:14
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.CAMP.HHN. 2021-11-21T16:33:02.07 0.3 undecidable manual S 145 0.3327 96 0.04 71
IV.MML1.EHZ. 2021-11-21T16:33:01.98 0.6 undecidable manual S 337 0.3318 96 -0.02 47
IV.MF5.EHZ. 2021-11-21T16:33:01.47 0.6 undecidable manual S 52 0.2896 97 0.7 41
IV.CESI.HHZ. 2021-11-21T16:33:00.14 0.6 undecidable manual S 318 0.2662 98 0.07 47
IV.FOSV.EHZ. 2021-11-21T16:33:00.85 3.0 undecidable manual P -0.13 0
IV.LNSS.HHZ. 2021-11-21T16:32:59.16 0.6 undecidable manual S 201 0.2203 101 0.43 44
IV.FDMO.HHZ. 2021-11-21T16:32:59.59 0.6 undecidable manual S 349 0.2329 100 0.49 44
IT.MTCL.HGE. 2021-11-21T16:32:58.38 0.3 undecidable manual S 329 0.2158 102 -0.22 69
IV.TERO.HHZ. 2021-11-21T16:32:57.50 3.0 undecidable manual P -0.15 0
IV.FEMA.HNE. 2021-11-21T16:32:57.22 0.3 undecidable manual S 335 0.17 108 -0.08 72
IV.MML1.EHZ. 2021-11-21T16:32:56.70 1.0 negative manual P 337 0.3318 96 -0.1 23
IV.MF5.EHZ. 2021-11-21T16:32:56.43 1.0 negative manual P 52 0.2896 97 0.34 22
IV.MMO1.EHE. 2021-11-21T16:32:56.52 0.6 undecidable manual S 55 0.1592 111 -0.46 44
IV.RM33.EHZ. 2021-11-21T16:32:56.54 1.0 positive manual P 0.07 0.55
IV.CAMP.HHN. 2021-11-21T16:32:56.64 0.1 undecidable manual P 145 0.3327 96 -0.17 91
IV.MC2.EHZ. 2021-11-21T16:32:55.71 0.6 undecidable manual S 16 0.107 126 0.08 49
IV.CESI.HHZ. 2021-11-21T16:32:55.71 0.3 negative manual P 318 0.2662 98 0.03 71
IV.SMA1.EHZ. 2021-11-21T16:32:54.98 0.6 undecidable manual P -0.01 1.09
IV.FEMA.HNE. 2021-11-21T16:32:54.28 0.1 undecidable manual P 335 0.17 108 0.2 94
IV.MTRA.EHZ. 2021-11-21T16:32:54.34 1.0 undecidable manual P 0.09 0.55
IV.NRCA.HNZ. 2021-11-21T16:32:54.18 0.6 undecidable manual S 315 0.036 159 -0.17 48
IT.MTCL.HGE. 2021-11-21T16:32:54.72 0.1 undecidable manual P 329 0.2158 102 -0.12 95
IV.LNSS.HHZ. 2021-11-21T16:32:54.78 0.1 undecidable manual P 201 0.2203 101 -0.13 95
IV.FDMO.HHZ. 2021-11-21T16:32:54.97 0.1 undecidable manual P 349 0.2329 100 -0.15 94
IV.MMO1.EHE. 2021-11-21T16:32:53.83 0.1 undecidable manual P 55 0.1592 111 -0.07 96
IV.MC2.EHZ. 2021-11-21T16:32:53.14 1.0 undecidable manual P 16 0.107 126 0.02 25
IV.NRCA.HNZ. 2021-11-21T16:32:52.42 0.1 undecidable manual P 315 0.036 159 0.04 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.NRCA.HNE. ML:1.4 0.0003562448 0.4736 AML other m 2021-11-21T16:32:54.00
IV.NRCA.HNN. ML:1.6 0.0005670596 0.1536 AML other m 2021-11-21T16:32:54.20
IV.MC2.EHE. ML:1.5 0.00031136165 0.2432 AML other m 2021-11-21T16:32:56.69
IV.MC2.EHN. ML:1.5 0.00028304195 0.32 AML other m 2021-11-21T16:32:56.36
IV.MTRA.EHE. ML:0.8 4.1613575E-5 0.2432 AML other m 2021-11-21T16:32:59.48
IV.MTRA.EHN. ML:0.9 5.1145135E-5 0.2304 AML other m 2021-11-21T16:32:59.09
IV.LNSS.HHE. ML:1.1 6.7967505E-5 0.1152 AML other m 2021-11-21T16:32:59.56
IV.LNSS.HHN. ML:1.2 7.9065835E-5 0.1152 AML other m 2021-11-21T16:32:59.80
IV.FDMO.HHE. ML:0.6 1.9488565E-5 0.1792 AML other m 2021-11-21T16:33:02.91
IV.FDMO.HHN. ML:0.6 1.901149E-5 0.1664 AML other m 2021-11-21T16:33:00.09
IV.SMA1.EHE. ML:0.8 3.5488125E-5 0.1536 AML other m 2021-11-21T16:32:59.45
IV.SMA1.EHN. ML:1 4.8648135E-5 0.1792 AML other m 2021-11-21T16:32:59.36
IV.CESI.HHE. ML:0.8 3.0400105E-5 0.1792 AML other m 2021-11-21T16:33:00.57
IV.CESI.HHN. ML:0.9 3.337289E-5 0.128 AML other m 2021-11-21T16:33:00.56
IV.RM33.EHE. ML:0.8 2.504367E-5 0.1408 AML other m 2021-11-21T16:33:02.30
IV.RM33.EHN. ML:0.7 2.011054E-5 0.1664 AML other m 2021-11-21T16:33:03.33
IV.MML1.EHE. ML:0.6 1.5141205E-5 0.1536 AML other m 2021-11-21T16:33:03.74
IV.MML1.EHN. ML:0.6 1.2957465E-5 0.128 AML other m 2021-11-21T16:33:03.12
IV.TERO.HHE. ML:1.9 0.0002441641 0.4992 AML other m 2021-11-21T16:33:03.20
IV.TERO.HHN. ML:0.8 2.2258655E-5 0.1152 AML other m 2021-11-21T16:33:04.06
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