Earthquake with magnitude of ML 0.9 on date 22-09-2021 and time 00:26:26 (UTC) in region 2 km NW Cagnano Amiterno (AQ)

A magnitude ML 0.9 earthquake occured in region: 2 km NW Cagnano Amiterno (AQ), on

  • 22-09-2021 00:26:26 (UTC)
  • 22-09-2021 02:26:26 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.476, 13.206 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
Cagnano Amiterno AQ 2 1369 1369
Montereale AQ 6 2581 3950
Barete AQ 7 737 4687
Borbona RI 7 617 5304
Pizzoli AQ 9 4326 9630
Capitignano AQ 9 665 10295
Posta RI 10 694 10989
Antrodoco RI 12 2588 13577
Scoppito AQ 12 3727 17304
Micigliano RI 13 127 17431
Borgo Velino RI 14 972 18403
Cittareale RI 16 482 18885
Campotosto AQ 16 542 19427
Castel Sant'Angelo RI 17 1308 20735
Amatrice RI 18 2657 23392

Municipalities with at least 50000 inhabitants

An earthquake occurred to
21 Km NW of L'Aquila (69753 inhabitants)
46 Km W of Teramo (54892 inhabitants)
47 Km E of Terni (111501 inhabitants)
66 Km NE of Guidonia Montecelio (88673 inhabitants)
66 Km NE of Tivoli (56533 inhabitants)
67 Km SE of Foligno (57155 inhabitants)
78 Km W of Montesilvano (53738 inhabitants)
80 Km W of Chieti (51815 inhabitants)
83 Km W of Pescara (121014 inhabitants)
88 Km NE of Roma (2864731 inhabitants)
91 Km E of Viterbo (67173 inhabitants)
95 Km NE of Velletri (53303 inhabitants)
97 Km SE 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 2021-09-22
00:26:26
42.4763 13.2058 11 2021-09-22
01:04:35
Sala Sismica INGV-Roma 95717931
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-09-22 00:26:26 ± 0.06
Latitude 42.4763 ± 0.0027
Longitude 13.2058 ± 0.0049
Depth (km) 11 ± 0 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 95717931

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 369
Semi-minor axis of confidence ellipse (meter) 295
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 293
Circular confidence region, given by single value of horizontal uncertainty (meter) 370
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 118
Number of associated phases, regardless of their use for origin computation 17
Number of defining phases 17
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) 0.03327
Epicentral distance of station farthest from the epicenter (degree) 0.36333
Number of stations at which the event was observed 9
Number of stations from which data was used for origin computation 9
Magnitude information

ML:0.9

Field Value
Value 0.9
Uncertainty 0.2
Num. used stations 4
Type of magnitude ML
Reference to an origin 95717931
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-09-22 01:04:35
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.NRCA.HHZ. 2021-09-22T00:26:39.77 0.3 undecidable manual S 349 0.3633 90 -0.12 71
IV.TERO.HHZ. 2021-09-22T00:26:38.57 0.3 undecidable manual S 63 0.3274 90 -0.26 69
IV.FIAM.HNE. 2021-09-22T00:26:35.49 0.3 undecidable manual S 198 0.2185 90 -0.1 73
IV.LNSS.HHZ. 2021-09-22T00:26:34.18 0.3 undecidable manual S 316 0.1754 91 -0.15 73
IV.NRCA.HHZ. 2021-09-22T00:26:34.33 0.6 undecidable manual P 349 0.3633 90 0.03 49
IV.SMA1.EHZ. 2021-09-22T00:26:34.60 0.3 undecidable manual S 32 0.1808 91 0.11 75
IV.T1299.EHN. 2021-09-22T00:26:34.16 0.3 undecidable manual S 20 0.1673 91 0.07 75
IV.TERO.HHZ. 2021-09-22T00:26:33.48 0.3 negative manual P 63 0.3274 90 -0.21 70
IV.CAMP.HHE. 2021-09-22T00:26:33.85 0.3 undecidable manual S 68 0.161 91 -0.05 75
IV.SMA1.EHZ. 2021-09-22T00:26:31.33 0.3 positive manual P 32 0.1808 91 0.14 74
IV.LNSS.HHZ. 2021-09-22T00:26:31.26 0.6 undecidable manual P 316 0.1754 91 0.17 49
IV.FIAM.HNE. 2021-09-22T00:26:31.82 0.3 undecidable manual P 198 0.2185 90 0 75
MN.AQU.HHN. 2021-09-22T00:26:31.83 1.0 undecidable manual P 130 0.1916 91 0.47 23
IV.CAMP.HHE. 2021-09-22T00:26:30.89 0.3 undecidable manual P 68 0.161 91 0.05 76
IV.T1299.EHN. 2021-09-22T00:26:30.99 0.3 undecidable manual P 20 0.1673 91 0.04 76
IV.RM33.EHZ. 2021-09-22T00:26:30.55 0.3 undecidable manual S 11 0.0333 156 -0.19 76
IV.RM33.EHZ. 2021-09-22T00:26:29.16 0.1 undecidable manual P 11 0.0333 156 0.14 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:1.2 0.000225 0.34 AML other m 2021-09-22T00:26:30.94
IV.RM33.EHN. ML:0.9 0.0001278 0.16 AML other m 2021-09-22T00:26:31.11
IV.SMA1.EHE. ML:0.9 5.485E-5 1.14 AML other m 2021-09-22T00:26:34.90
IV.SMA1.EHN. ML:0.8 4.09E-5 0.76 AML other m 2021-09-22T00:26:37.41
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