Earthquake with magnitude of ML 1.1 on date 22-07-2021 and time 00:28:20 (UTC) in region 6 km N Montereale (AQ)

A magnitude ML 1.1 earthquake occured in region: 6 km N Montereale (AQ), on

  • 22-07-2021 00:28:20 (UTC)
  • 22-07-2021 02:28:20 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 42.577, 13.245 at 16 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
Montereale AQ 6 2581 2581
Amatrice RI 7 2657 5238
Capitignano AQ 8 665 5903
Cittareale RI 8 482 6385
Campotosto AQ 11 542 6927
Borbona RI 12 617 7544
Cagnano Amiterno AQ 13 1369 8913
Accumoli RI 13 667 9580
Posta RI 13 694 10274
Barete AQ 14 737 11011
Pizzoli AQ 16 4326 15337
Crognaleto TE 20 1297 16634

Municipalities with at least 50000 inhabitants

An earthquake occurred to
28 Km NW of L'Aquila (69753 inhabitants)
39 Km W of Teramo (54892 inhabitants)
49 Km E of Terni (111501 inhabitants)
61 Km SE of Foligno (57155 inhabitants)
75 Km W of Montesilvano (53738 inhabitants)
77 Km NE of Guidonia Montecelio (88673 inhabitants)
77 Km NE of Tivoli (56533 inhabitants)
80 Km W of Chieti (51815 inhabitants)
80 Km W of Pescara (121014 inhabitants)
91 Km SE of Perugia (166134 inhabitants)
95 Km E of Viterbo (67173 inhabitants)
98 Km NE of Roma (2864731 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 1.1 2021-07-22
00:28:20
42.5768 13.2448 16 2021-07-22
00:34:09
Sala Sismica INGV-Roma 93040801
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2021-07-22 00:28:20 ± 0.09
Latitude 42.5768 ± 0.0054
Longitude 13.2448 ± 0.0049
Depth (km) 16 ± 1 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 100 -> SURVEY-INGV
Event type earthquake
Origin ID 93040801

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 614
Semi-minor axis of confidence ellipse (meter) 113
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 171
Circular confidence region, given by single value of horizontal uncertainty (meter) 610
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 16
Number of defining phases 16
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) 0.06385
Epicentral distance of station farthest from the epicenter (degree) 0.28239
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:1.1

Field Value
Value 1.1
Uncertainty 0.2
Num. used stations 6
Type of magnitude ML
Reference to an origin 93040801
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2021-07-22 00:34:09
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.GAVE.EHZ. 2021-07-22T00:28:31.65 0.6 undecidable manual S 294 0.2824 105 0.22 47
IV.NRCA.HHZ. 2021-07-22T00:28:31.06 0.6 undecidable manual S 340 0.2743 105 -0.13 48
IV.TERO.HHZ. 2021-07-22T00:28:30.90 0.6 undecidable manual S 80 0.268 106 -0.12 48
IV.MTRA.EHZ. 2021-07-22T00:28:29.17 0.6 undecidable manual S 32 0.2113 112 -0.26 47
IV.LNSS.HHZ. 2021-07-22T00:28:27.81 0.6 undecidable manual S 280 0.1529 123 -0.08 49
IV.NRCA.HHZ. 2021-07-22T00:28:26.64 0.3 negative manual P 340 0.2743 105 0 74
IV.SMA1.EHZ. 2021-07-22T00:28:26.45 0.6 undecidable manual S 51 0.0854 143 0.02 50
IV.GAVE.EHZ. 2021-07-22T00:28:26.76 0.6 negative manual P 294 0.2824 105 -0.02 49
IV.T1299.HNZ. 2021-07-22T00:28:26.04 0.6 undecidable manual S 26 0.0639 152 -0.04 51
IV.TERO.HHZ. 2021-07-22T00:28:26.58 0.3 undecidable manual P 80 0.268 106 0.04 74
IV.RM33.EHZ. 2021-07-22T00:28:25.93 0.6 undecidable manual S 198 0.071 149 -0.27 48
IV.MTRA.EHZ. 2021-07-22T00:28:25.49 0.1 undecidable manual P 32 0.2113 112 -0.14 97
IV.SMA1.EHZ. 2021-07-22T00:28:24.23 0.1 positive manual P 51 0.0854 143 0.34 95
IV.LNSS.HHZ. 2021-07-22T00:28:24.70 0.1 undecidable manual P 280 0.1529 123 -0.04 99
IV.T1299.HNZ. 2021-07-22T00:28:23.81 0.1 undecidable manual P 26 0.0639 152 0.12 100
IV.RM33.EHZ. 2021-07-22T00:28:23.85 1.0 undecidable manual P 198 0.071 149 0.09 25
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.RM33.EHE. ML:1 9.895E-5 0.72 AML other m 2021-07-22T00:28:26.35
IV.RM33.EHN. ML:1.2 0.0001405 0.28 AML other m 2021-07-22T00:28:26.38
IV.SMA1.EHE. ML:1.4 0.000206 0.38 AML other m 2021-07-22T00:28:27.02
IV.SMA1.EHN. ML:0.9 6.895E-5 1.38 AML other m 2021-07-22T00:28:27.30
IV.NRCA.HHE. ML:1 4.04E-5 0.14 AML other m 2021-07-22T00:28:31.44
IV.NRCA.HHN. ML:1 3.845E-5 0.12 AML other m 2021-07-22T00:28:31.83
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